UC-NRLF SB 27fl S MKNT A!, v Nl " -MTTJ jjrtiljmctxul <] PERTAINING TO THE WORK OF HANDLING WHOLE AND FRACTIONAL HUM^fiS AND A GREAT VARIETY OF IMPORTANT PRACTICAL 'OBLEMS BEING A COMPLETE IHTEOE7CTOHY vVOEZ S ( .' ! K i 377. IN MEMORIAM FLOR1AN CAJORI SOULE'S EMBRACING MENTAL AND WRITTEN jirttijmettcal (J.xcrdses *ni Camples* I'KKTAININ<; TO Til K WORK OF HANDLING NUM HERS AND THK APPLICATION TUKREOF TO SIMPLE PRACTICAL QUESTIONS INVOLVING THE PRINCIPLES OF Addition, Subtraction, Multiplication and Division OF WHOLE AND FRACTIONAL NUMBERS. Also a great varii'ty ami ;i large number of important practical problems, such an occur in the ('oiiiitiiigio.mi, Factory, Workshop, on the Plantation, and throughout the various departments of business life. /)rsie found in the vast fields of thought. And all who aspire to pre-eminence in brain power all who hope to ascend to the highest planes of mathematical knowledge, must devote themselves earnestly to this subject. In the selection of the material and the elements for it prob- lems, this work does not present the toys and play things of the nursery, nor does it confine itself to the articles bought and sold on 'change. Instead of gyrating in the non-practical and non- progressive paths described by its hundreds of predecessors, it has diverged into new channels and derived the facts and ele- ments of many of its problems from geography, history and chronology ; from educational and commercial statistics ; from Natural Philosophy, Astronomy, Geology and Chemistry ; from Anatomy, Physiology and Hygiene; and from many other PREFACE. V departments of scientific knowledge. Through this means, the work is rendered far rno^e interesting, and as it brings into use different organs of the mind from those which consider the com- putation of numbers only, it thereby imtaes the mind of the learner with much valuable information without the cost of additional study or the expenditure of additional time. The work has been prepared during such intervals of time as the author could command from his professional duties as teacher of Business Sciences, and Consulting and Practical Accountant ; and, nowithstanding great care has been bestowed upon it, it is not improbable that some typographical or other errors may have escaped notice. Should any such be found, the author will esteem it a favor to be informed of them, in order that they may be expunged in future editions. The author avails himself of this occasion to extend his thanks to his associate instructors and advanced students for their kindly aid in proof reading, and especially does he express his gratitude to his assistant instructor, Mr B. I). Rowlee, for services cheerfully rendered in proof reading and the re-working of problems. Soliciting for the work a thorough examination and a just measure of its merits, with the earnest hope that it may prove acceptable, and be of service in unfolding the principles of the beautiful science of numbers, and aid in advancing the interests of the rising generation, it is now submitted to the public. THE AUTHOR. NEW ORLEANS, Jan. 4, 1877. TOPICAL INDEX. Pago. DEFINITIONS 1 to 5 FRENCH SYSTEM OF NUMERATION 6 ENGLISH SYSTEM OF NUMERATION 7 THE ROMAN SYSTEM OF NOTATION 8 TABLE OF ROMAN CHARACTERS 8 EXERCISES IN NOTATION AND NUMERATION 9 ADDITION (Definitions and Introduction.) 10 Addition Tables 11 to 12 Addition and Subtraction Tables 13 to 14 Signs and Abbreviations 15 Mental Exercises in Addition 10 to 17 Examples in Addition IT to 23 Proof of Addition 18 Dollar and Cent Signs 23 Addition of Dollars and Cents 23 Miscellaneous Examples in Addition 24 to 31 STBTRACTION Definitions and Introduction 31 to 32 Oral Exercises in Subtraction 32 Examples in Subtraction 32 to 39 To subtract Dollars and Cents 35 MULTIPLICATION Definitions and Introduction... 40 Multiplication Table 41 Oral Exercises in Multiplication 42 to 43 To Multiply when the Multiplier consists of only one figure 43 Examples in Multiplication 43 to 53 To Multiply when the Multiplier consists of more than one figure 45 To Multiply when either the Multiplicand or Multiplier or both have naughts on the right 47 To Multiply by the Factors of a number 48 To Multiply when the Multiplicand or Mul- tiplier contains dollars and cents Miscellaneous Problems in Multiplication... 49 to 53 DIVISION Introduction and Definition 53 Principles of Division 53 to 54 Proof of Division .. 54 TOPICAL INDEX. Vll DIVISION Oral Exercises in 54 to 55 Fractional Numbers and Examples 55 to 57 Written Exercises 57 To Divde when the Divisor does not exceed 12 57 Short Division , 57 to 60 To Divide when the Divisor exceeds 12 59 Examples in Short Division 58 to 59 Long Division 60 To divide when there are naughts on the right of the Divisor 61 Examples in Long Division 60 to 70 To Divide by the Factors of a number 63 Problems involving the English Money of Account 69 to 70 Miscellaneous Problems involving the Prin- ciples of Addition, Subtraction, Multipli- cation and Division 70 to 72 CANCELLATION Fully explained 72 to 75 PROPERTIES and Definitions of Numbers 75 to 77 Divisibility of Numbers 77 to 78 FRACTIONS and Definitions of Fractions 78 Classification of Fractions 79 to 80 General Principles of Fractions 80 REDUCTION OF FRACTIONS 80 Oral Exercises in Fractions 80 to 86 Greatest Common Divisor and Examples... 86 to 87 Least Common Multiple and Examples 88 To Reduce Fractions to their lowest terms.. 89 To Reduce Whole or Mixed numbers to Improper Fractions 90 To Reduce Improper Fractions to Whole or Mixed numbers 90 To Reduce Compound Fractions to Simple Fractions 91 To reduce fractions of different denomina- tors to equivalent fractions of a common denominator or of the least common de- nominator 92 to 94 DENOMINATE FRACTIONS 94 To reduce a denominate fraction from a greater unit to a less 94 To reduce a denominate fraction from a less unit to a greater 94 ADDITION OF FRACTIONS 94 to 98 SUBTRACTION OF FRACTIONS... 99 to 102 Vlll TOPICAL INDEX. MULTIPLICATION OF FRACTIONS 103 to 111 To multiply Abstract Fractional numbers... 108 Miscellaneous examples in Multiplication of Fractions 108 to 111 DIVISION OF FRACTIONS 112 to 121 Division of Abstract numbers 116 Miscellaneous examples in Division of Frac- tions 117 to 121 Miscellaneous examples involving the prin- ciples of Addition, Subtraction, Multipli- cation and Division of Fractions 121 to 127 DECIMAL FRACTIONS Definition* and Intro- duction 127 to 144 Exercises 131 Principles 133 Reduction of Decimals 133 To reduce Decimal Fractions to a common denominator 133 To reduce a decimal to a common fraction.. 133 To reduce common fractions to equivalent decimals 134 ADDITION OF DECIMALS l.:<; SUBTRACTION OF DECIMALS 137 MULTIPLICATION OF DECIMALS 138 To multiply a decimal or mixed number by 10, 100, 1000, etc 140 DIVISION OF DECIMALS 140 To divide Decimal Fractions by 10, 100, 1000, etc 143 MISCELLANEOUS PRACTICAL PROBLEMS ^uch as occur in the counting-room, factory, workshop, on the plantation, and in the various departments of business life 144 to 149 BILLS AND INVOICES 149 to 165 WEIGHTS AND MEASURES 165 Definitions and comparison of different units. 165 to 167 Tables of 167 to 173 DEFINITIONS. 1. Definition is the meaning or import of a word ex pressed by other words. is classified knowledge. >. Quantity i s nn y thin^ that can he increased or diminished. 4. A I llit is ti single tiling of whatsoever denomination or nature. 5. A Number is a unit or a collection of units. <>. All Abstract Xmilber is one in which the kind of unit or (juantity is not designated, thus: three, four, five, etc. 7. A Denominate or Concrete Number is one in which the kind of unit is designated. Thus: two pounds, five vards. nine dollars, etc. K. A Compound Number is a denominate numher expressed in two or more denominations, thus: ,"> years. 4 months and S days: '1 milrs, ."> furlongs and 10 rods: 2 yards, '2 feet and 5 inches. !>. An Arithmetical Complement of a Number i.sthe dillerenc<- hetwern the numher and a unit of the next higher nrder, thus: .'I is the arithmetical Complement of 7 ; -(> is the arithmetical complement of 71 : l!> is the arith- metical complement of J)Sl. 1 (> . A Problem is a <|uestion ju-oposed or given for solution. 11. Philosophy the knowledge of phenomena as explained hy and resolved into causes and reasons, powers aud hi\vs. 4 Arithmetical Exercises and Examples. 12. ^ Arithmetic is tin- Science of Numbers: or to define it more extemledly, it is that branch of .Mathematics which treats of the properties and relations of numbers when expressed by the aid of figures, either singly or com- bined. These principles and relations of numbers combined with the facts relating to problems, aie applied, by the rea- soning powers of man to the solution of all numerical prob- lems of business affairs and practical life. 13. Figures; in Arithmetic _ ///////> x are characters used to represent numbers. The ten Arable figures which we use, are Nan-lit or Cipher One T\v.> Tim-.. F"iir Fi\i- Six Seren Ki^lit Nino 1 2 3 4 5 (I 7 8 !) By properly combining these ten figures all possible num- bers may be represented. The 1, 2, 3, 4, 5, 6, 7, 8, and H are sometimes called dibits. They are also called the significant figures because each sig- nifies a number when alone. The is so called because by itself it docs not signify or represent any number. It expresses number only when used in connection with other figures. 14. Yalue of Figures Figures have two values, a afin}rfc and a local value: thus when we write 2, independ- ent of other figures, it has only a simple value, representing two units ; but when we write it to the left of another fig- ure or figures, thus, 23 or 241, it has a local value as well as a simple value. This local value depends on the scale or system of numbers employed and its location in the scale. 15. Order of Figures The successive places occu- pied by figures are often called orders. Thus a figure in the first place is called a figure of \\\Q first order, or of the order of units ; a figure in the second place is a figure of the second order, or of the order of tens ; in the third place, of the third order, or of the order of hundreds ; and so on, each figure next to the left belonging to a distinct order, the unit of which is tenfold the size or value of a unit of Definitions. the order of the figure on its right ; and this increase in value from right to left Ly ten constitutes the Decimal Scale or fystem of numbers. 16. Notation is a method of writing numbers. There are two systems, the Arabic and Roman. By the Arabic Notation numbers are expressed or writ- ten by Jipures. By the Roman Notation numbers are expressed or writ- ten in letters. pi 17. Numeration is the method of reading written numbers. There are two systems of numerating or reading numbers, the French and the English. The French system is the one in general use in the United States and the Continent of Europe. The Enf/1Ixh system is that generally used in England and the English Provinces. Arithmetical Examples and Exercises. FRENCH S VST KM < K M MKKATIoN. 18. The Fivnch system separates liirure^ into Croups or periods of three figuivs each. and -ives a different name to each period, thus : ' 2, = 7 f |J|J " ' ft v i - - " ' ft I 4^ -= , " ? , r ic Bundreda of |ft|J cc Tens of Octillions. ( * Octillions | "ii Hundreds of ! f-f !'] ~ Tens of " 2, I J-* Se|lilli)iis. I hmdivd- of Tt-us of SrxtilliniH. / >rXtiHinilliun>, Decillions I'ndecillions, Duodecillions, Tredecillions, Quatuordecillioiis, Qnindecilliona SexdeciUions, Se|>t^ndecillions, Octod'.'cilli'.!is >'tvfuidecil lions Vii:;intillious, &c. English System of Numeration. ENGLISH SYSTEM OF NUMERATION. 19. The English system of numeration separates the figures into groups or periods of six figures each, and desig- nates each period by a distinct name, thus : ic Hundreds of Thousands of Quadrillions. GO Tens of Thousands of Quadrillions. 4-* Thousands of Quadrillions. ^i Hundreds of Quadrillions. cs Tens of Quadrillions. ^ Quadrillions. .: Hundreds of Thousands of Trillion-. i~ Tens of Thousands of Trillions. -j. Thousands of Trillions. Hundreds of Trillions. - 1 Ten- nf Trillions. j> Trillions. - Hundreds of Thousands of Billion-. o Tens of Thousands of Millions. 4- Thousands of Billions. - I lundreds of Billions. -: Tens of Billions. t~ I i II ion-. 4- Hundreds of Thousands of Millions. / Tt-ns of Thousands of Millions. -i Thousand^ of Millions, tc 1 lundreds of Millions. ~- Tens of Millions. :; Millions. Hundreds of Thousands. co Tens of Thousands. r> Thousands. ^. Hundreds. C5 Tens. /. I'n its. By examining and comparing the two systems, it will be observed that they are the same to the ninth figure or the hundreds of millions, but at that figure a variation is made. Hence, if we wish to know the value of numbers higher than hundreds of millions, when we hear them spoken or see them in print, we must know whether they are ex- pressed according to the French or the English system of numeration, Arithuwtical K.\ari^cs and Examples. TIIK KO.MAN SYSTFM OF NOTATION. *JO. hi tin- Roman system of notation the letter 1 repre- sents '///.; Vjfive; X. ////; L. //////; (', nut- Jntmlnd; 1>, ///v hundred &ud M. ///J. The intermediate and 'lini: nnml.-is are express. -d aeeordinL: to (lie Ibllow- iiiLT principles : First. Kvery time a letter i.- repeated, its value is re- peat- d : thu> II ivpivseiits fteo; XX rejr->ents ///v uti/. Srcond. Wlieiia Irt ter o{' / xs/ / value is jilaeed before one of i/rt-utt r value, the lesser i> taken iroin the greater : ifplaeed afii-r the greater, it is to lie added to it. Thus, IV repre- sents f<'i\ while V I represent.- >/./; XL represents Jrtij^ I A represent.^ >/.////. Third. A line or Kir . plaeed over a letter, increase> it> value a thou>and /inn*. Thus X re]rt'-ent> t> n sitnd ; L re]>resents ////// OF KO.MAN CHARACTERS. I II 111 IV V VI VI I II 11 IX X XI XII XIII XIV XV XVI XVII XVIII XIX XX XXI XXII XXIII XXIV one. XXV twenty-live. two. XXVI twenty-six. three. XXVII lweuty->even. four. XXVIIJ twenty-ei.uht. five. X X 1 X twenty-nine. ->ix. X X X thirty. seven. XL forty. eight. L fifty. nine. LX sixty. ten. LXX seventy. eleven. LXXX eighty. twelve. xc ninety. thirteen, ( one hundred. fourteen. cc two hundred. fifteen. ( < three hundred. sixteen. ( ( ( ( four hundred. seventeen. I) live hundred. eighteen. DC six hundred. nineteen. DCC seven hundred. twenty. IK.'v (' ei<;lil hundred. twenty-one. pcccc nine hundred. twenty-two. twenty-three. M MM one thousand. two thousand. twenty-four MixrrLXXVI 1876, Exercises in Notation and Numeration. 9 EXERCISES IN NOTATION AND NUMERATION. 21. In Writing Numbers begin at the left hand with the highest order and write each period in regular order, separating them by com mas. Write in figures the following numbers and nuni'Titc them according to the French .system of numeration. 1. One thousand, six hundred and ninety- four. 2. Eighteen hundred and seventy-seven. .'{. Twenty-four hundred and six. 4. Three hundred forty-one thousand and twenty two. 5. Sixty-five million, one hundred thirty two thousand. three hundred and eighty -seven. 6. Twelve billion, sixteen million, forty-throe thousand. one hundred and eleven. 7. Nine hundred thousand, three hundred and iifiy. 8. Six million, one hundred and sixty-nine thousand, four hundred and thirty-seven. 1). Seventy-six million, four hundred thousand, one hundred. 10. Twenty-two billion, one hundred three million, five hundred seventy-six thousand, one hundred and two. 11. One hundred two trillion, one hundred twenty live million, four hundred and three. 12. Eight trillion, seven billion and seventy-six. 22. Write in figures the following numbers and nume- rate them according to the English system of numeration: 1. Four hundred twenty-three thousand, five hundred and fourteen. 2. Six hundred nineteen thousand, one hundred lil'ly- two million, t\venfy-one thousand and fortv seven. !>. Fifty-three billion, two hundred twelve tlmus-nd. twenty-six million, seventy-live thousand three hundred and eighty-four. 2:J. Write in the Koman System <;f Notation the follow- ing numbers : l< ->, 12. 14,37,49, s: 1 ,. His, ;,i!>. i:,ij. 11701. ssivrr,. 13140363. 1<> Arithmetical Exercises and Examples. A D hi T I o\. -I. Addition -"/'"'/'"*''"// is the prm-ess if uniting two or mure numbers oi' the same name or kind, so us t<> make one equivalent IIUlllh'T. -"). The number obtained }>\ tliis process is called the Sum "i Amount. L'O. The SiiCIl Of Addition is a perpendicular CFO8S, . called plus: it means more- ; thus 7 -\ !' is read. 7 plus !>, and means that 7 ami !> ar to he added. When used after a niuiiher. thus. 5 --)- -. which is read ."> plus, it means ."> and a small exo '11. The SilTll Ol' Kqimlity is ^t is read equals, or eijual to. and denotes that the numhers hetween which it is placed are njual to each other ; thus 7 | !> ^= 1C means that 7 and !> added art 1 njual to Hi. The expression is read. 7 ]>lus !> equals 1 ( J. rrhn-ijtli' <>f' Addition. Xumhers of the same kind, order or character only, can he added. Thus we cannot add - apples and 3 oranges, nor 5 pounds of sui^ar and (I boxes oi' peaches ; nor (I units and f> hundreds; nor 2 and }. etc. \Ve can only add apples to apples, oranges to oranges, suirar to suu'ar, peaches to peaches, units to units, hundreds to hundreds, halves to halves, fourths to fourths, etc. We can enlist together things of different kinds, apples, peaches, fiances, etc.. hut by coll-ectitii: them together we do not increase the number or sum of either aud hcuce there is no addition. Addition Tables. 1 1 ADDITION TABLE. oU. No. I. Kan. In h-iiniiiii:- thr.-M- tal.l.-s ami hamllin.ir all numliiTs. all intlh,ul.| I mitt.'.l. Thus in.-t.-a.l ..f savini: or thinking, that ~1 ami - ar.- 1. :' an-1 5 ura >. etc., M$ Ot tliinU 1 : v : etc. /.\rj>/<(itn(i> Hence, though the table does not 6.5.4 7 contain all the possible combma- 1 4> O 1 ._'""J' 8 tions, it does contain all that are i .0.0.4 essential and of value in this con- 1.2.3.4 g 8.7.6.5 nection. Arithmetical \rn i; .srs un.l Examples. ADDITION TAB LK. ]_>;; j ;, :i x - j; - } Explanation. In this table we >lin\v ihi- LT) (litlt'ivnt combinations L'.:5. I. :> :>. S.T.I; of the :> significant ii^mvs th<> .>', " ( . sum of which equals f> // or more. 1'2 ' s -< ( - '!> attain rapidity in adding, it I ;,.i; is absolutely necessary that, the MS" '_^__ learner should be so familiar with ">."'. 7 , . these eombinatiuns that he can 9.8.7 instantly see the result without 15 adding, i. e. he must know the J.a result by the combination, just as r+ o y'g l^ he knows the value of 4, or 5, by the combination of lines forming 8 -j *r 9 the figure, or as he knows the pro- nunciation of a word without 18 spelling it, The rapid increasing and decreasing operations in the science of numbers depend upon the capacity of the calculator to instantly apprehend and accurately apply, the result of two or more figures, no matter how they may be combined. And the object of these tables is to aid in acquiring the desired capacity* Addition and Subtraction Tables* 13 K w H ^ . EC H rH N TAI'.LKS. 33. TA15LK IV. 1 A i 7=100 26 A ?=100 :.i , loo 76 & ?=lfO 1 100 27 100 52 loo 77 loo 3 loo 28 100 53 loo 78 100 4 100 29 100 54 loo 100 5 100 30 100 loo 10 6 100 31 100 56 loo si 100 7 100 32 100 57 100 100 8 100 33 100 58 100 83 100 !> 100 34 loo r>9 loo 100 10 100 100 100 100 11 100 36 100 til 100 100 12 100 37 loo 62 100 87 100 13 100 38 100 63 100 88 100 14 100 39 100 64 100 89 100 15 100 40 100 65 100 90 100 16 100 41 100 66 100 91 100 17 100 42 10* 67 100 92 loo 18 100 43 100 68 100 93 100 19 100 44 100 69 100 94 100 20 100 45 100 70 100 95 100 21 100 46 100 71 100 96 100 22 100 47 100 72 100 97 100 23 100 48 100 73 100 r. Debit or Debitor. l a One and one-half. Gal. Gallons. ] I, 2 doz. No. 4 (oj 5 shillings per doz., and (5 doz. No. 5 (fV 4 shillings sixpence per dozen. 16 Arithmetical Exercises and Examples. 35. Name the unit result of the following numbers : !) 898989887 9 5 6 9866442298797 3 8 7 6 8 5 5 6 9 4 7 5 9 3 3 4 4 7 5 (i 1 7 7 8 3 4 5 1 1 9 8 g 3 6 5 5 2 2 3 3 2 1 5 7 4 7 7 9 8 7 8 2 4 6 8 9 3 7 1 8 4 6 5 4 9 7 9 7 4 8 2 7 7 8 5 6 8 8 5 5 8 9 9 8 9 8 8 5 6 9 For further explanation of Addition, the importance of it, and the most rapid processes of adding see Soule's Con- tractions in Numbers. EXERCISES. 1. Write all the combinations of two figures that make 10, 11, 12, 13, 14, 15, 16, 17 and 18. 2. Commence with 1 and orally add thereto 2, and con- tinue to add 2 to the successively occurring sums until you produce 21. Thus 3, 5, 7, 9, 11, 13, etc. 3. Commence with 1 and in like manner add 3 until you produce 31. Thus 4, 7, 10, 13, etc. 4. Commence with 1 and in like manner add 4 until you produce 41. 5. Commence with 1 and in like manner add 5 until you produce 51. 6. Commence with 1 and in like manner add 6 until you produce 61. Examples in Addition. 17 7. Commence with 1 and in like manner add 7 until you produce 71. 8. Commence with 1 and in like manner add 8 until you produce 81. 9. Commence with 1 and in like manner add 9 until you produce 91. 10. Oially add by 2'' until you produce 20. 11. " 3'* " " 30. 12. " " -1 v " " 40. 13. " " ") " " 50. 14. " " 6' 8 " " GO. 15. " 7' 8 " " 70. 16. " " 8' 8 " " 80. 17. t{ " 9" " " 90. 18. " " 10'" " k ' 100. 19. Commence at 1 and orally add by 3 and 5 altern- ately until you produce 100. 20. Commence at 1 and orally add by 4 and 7 altern- ately until you produce 100. EXAMPLES IN ADDITION. 36. Add the following numbers : 6376, 564, 309, 485 and 5092. OPERATION. w j Explanation. In all addition pro- || blems we firgt write the numbers so |lc| that units of the same order will stand in the same column, i. e., units in the 6o7o units or first column; tens in the tens r f>(H or second column; hundreds in the ;;OJI hundreds or third column and so on through the numbers. We then begin at the units or first column and add the columns separately. In adding the first column, we commence with the 2 Swn 12,826 and 5, and name only the successive 1^ results thus, 7, 16, 20, 26; which is 2 tens and 6 units; the 6 we write in the first place or column of units and place the 2 tens which is to be carried to the column of tens directly below the 6 in a small figure. Then adding the 2 18 Arithmetical Exercises and Examples. tens to the tens column, we say, 11, 10, !!:>, .".2; which is:* hundred and 2 tens: the 2 tens we write in the column of tens and place the 3 hundreds, which is to be carried to the hundreds column directly under it. Then adding the 3 hundred to the hundreds column, we say, 7, 10, 15, 18, which is 1 thnumtml and S hun- dred; the 8 hundred we write in th hundreds column and the carrying figure, 1 thousand, directly under. Then adding ihn 1 thousand, to the fourth or thousands' column, we say <;, \'2, which is I (en thousand and 2 thnuxtinrl, and this being the last column to add we write the figures in their respective columns and produce 12826 as the siim of all the numbers. When adding, set the result in pencil figures, being careful to place the carrying figure or figures directly beneath the unit figure of each column added as shown in the preceding problem. PROOF OF ADDITION. The best proof of the correctness of addition is to be proficient in your work, and then re-add the columns in the reverse direction. What is the sums of the following groups of numbers ? (3) W (5) (6) 780 89 777 9040 1261 706 888 1288 537 73 999 9907 309 4009 666 6543 6987 8888 645 2018 Examples in Addition. 19 Add the following groups of numbers : 818 (8) 412 582 (10) 328 (ii) 809 (12) 981 390 297 578 346 523 350 970 318 757 386 605 269 270 824 420 672 848 789 752 932 731 793 945 696 843 373 542 64 397 136 805 570 853 905 684 169 129 876 684 448 976 295 768 444 743 404 666 468 9U4 102 915 151 217 687 972 814 080 148 879 825 114 331 637 263 516 951 340 554 917 295 259 784 545 101 650 101 890 122 022 m 411 401 864 440 749 490 237 874 565 450 717 876 349 898 150 414 222 902 489 769 514 654 234 390 698 243 446 789 100 484 228 174 576 458 305 235 433 952 489 747 272 380 949 683 394 030 729 .624 087 574 407 241 955 897 702 956 812 477 177 477 849 658 798 081 20 Arithmetical Examples and Exercises. Add the following groups of numbers: (13) 864 ,H) B77 595 (16) 849 (17) 539 257 363 305 249 : ) >77 476 629 420 n;.; 027 702 426 145 982 830 651 235 684 174 217 221 543 492 144 326 232 502 950 343 176 111 151 113 446 002 767 871 :;^7 438 834 182 644 512 516 455 540 955 747 814 247 328 919 156 376 331 633 358 989 106 468 281 (524 149 855 872 189 S2S 581 268 954 694 177 986 491 002 126 788 885 817 888 693 136 866 264 918 992 682 564 044 294 IN!) 202 355 163 922 896 259 548 223 764 116 597 365 521 921 911 814 329 208 530 515 866 277 678 662 874 735 179 476 040 704 528 393 129 716 821 387 584 550 659 778 802 584 457 587 848 255 025 202 888 932 Examples in Addition. 21 Add the following groups of numbers: 19 20 21 22 23 24 883 792 743 153 919 547 356 414 560 214 620 380 595 454 871 248 922 616 638 366 349 636 369 874 679 464 955 549 158 682 594 933 936 f>!>4 862 232 953 686 746 783 874 713 178 641 793 225 935 499 215 939 798 61!) 951 874 119 201 324 232 959 779 753 S71 687 478 865 622 311 438 843 484 724 718 1 S2 218 421 252 645 180 686 869 586 648 148 477 896 189 518 551 227 396 996 595 959 995 193 495 293 521 152 475 947 568 2(52 727 572 D77 797 130 515 259 425 362 736 111 833 585 458 485 328 682 745 177 217 631 803 685 125 413 841 194 729 996 245 825 972 698 169 492 968 868 489 258 845 194 540 799 386 277 477 864 Arithmetical Exercises and Example*. -11 28 15656:; 13331H2 IMJ4SJH' -.VJ7 8368G9 7391 573 f>7sr,7* 78754d 2. M24<> 35175(11) 5775!>4 !U 14:12 7H5183 8598674 GGSU7S wwi< :;i5!>^7 6<;7 :7s:;iji ;.viG78 5398 678789 I5(;.i:^ (;c,47:); :H;H;T:{ :ur>7l8 795568 895437 7;:>391 (IDDC.sn 569128 \\r.\\X\ 7893344 i;s!i7si; i;7snsi> 137987 688968 ><;'J771 r)i;;7-: i):;r,7 668339 :>4 1321 7788JHJ 'jrHiL'.-U 891389 431348 4235564 L>1>. Add 6, s. <>, 7, 6, 8, r>, 4, 9 5 4, 8, 7, 6, 9, 14, 19, IS, ITT, HS. 47, 59, 65, 74, 83, 9i'. Ans. 632. 30. Add 528,791, 14389,888,91361,587,301,7004, 52800. 71 6, Sii, 76, 65, 54, 43. Ans. 2248. 33. Add seven million four thousand and ninety-six, and three hundred eighty-seven thousand five hundred and sixty- tvo. Ans. 7391658. 34. Find the sum of 4888765, 92238, 1600084, 8888888, 99999999999, 4100000808707 and 222222333- 333444444. Ans. 222226533349723125. 35. Find the sum of 999999999, 88888888, 7777777, 666666, 55555, 4444, 333, 22, 1, and sixty-three millions. Ans. 1160393685. Examples in Addition. 23 80. Add 781), 67!). <>;.ii<;. 8555.55, 84-14.44, $333.33, $222.22, $111,11 and I/. Ans. 8-4. 999. 96. 53. Add $1)87.65. $876.54. 8765.4:;, 8(554 32, 8543.- 21, $123.45, $234.56, $345.67, $456.78, $567.89, $678.90 and $789. Any. $7,123.40. 54. Middle-miss bought a hat for $2, a coat for $9.50, a pair of shoes for $2.75, a pair of pants for $4, a vest for $1.75, and had $41.05 left. How much money had he at first? Ans. $61.05. 55. Miss Smith paid for a broom 35/, for soap $1.60, for starch 75/, for matches 5^, for salt 15/, for sugar $1.50, for rice $2, for butter 80/, Graham flour $1.25 and for a hygienic cook book $1. What was the sum paid for all? Ans. $9.45. 56. Prophet paid for a reader $1.35, for an arithmetic $1.50, for a history $2,' for a set of drawing instruments $3.70, for paper $.60, for pens $.15, for ink $.05, for a pair of Indian clubs $3.50, and for the boy's own book $1. What did all cost ? Ans. $13.85. 57. Conrad paid $1.75 for Chesterfield's letters ; $1.80 for Cutter's Anatomy, Physiology and Hygiene ; $1.75 ^Examples in Addition. 25 for Comb's Constitution of Man ; $1-25 for How to Read Character by Wells; $1.50 for .Nordhoff's Politics for Young Americans; $1.75 for Physical Perfection by Jac- ques ; $4 for Plutarch's Lives ; $8 for Shakspeare's Works ; $2 for the Literary Header ; $6 for Carey's Social Science ; $5 for Parson's Laws of Business; $5 for Soule's Philoso- phic Work on Commercial and Exchange Calculations, and $1 for Cushing's Manual. How much did he pay for all? Ans~ $40.80. 58. If you should travel by rail 160 miles, by steamer 214, and walk 8, how far would you travel? Ans. 382. 59. A planter raises 9842 pounds of sugar, 2351 pounds of cotton, 1827 pounds of rice, 3840 bushels of corn, 325 bushels of sweet potatoes and 194 bushels of beans. How many pounds and how many bushels does he raise in all? Ans. 14020 pounds, 4359 bushels. (JO. Conrad loaned to Purccll 8:> : to ( Iresham $3.50 ; to Ilanna 75/ ; to Mitchell 85;'; to Sweeney 5/ ; to IJothick $1 ; to Keen 25/J to Abbott 75/ ; to Prophet 50/. What sum did he loan to all? Ans. 16.65. til. Keen has Si I3.o:> ; Courct $91 ; McCoard $18.30; Bush90/; Nevers 25 c ; Fischer *:>.<>.'> : Heck $9 ; Meyers s<; ; Levy $7 : Brown $7 ; Kk-e $45 ; Shotwell 27 ; Wise $15.80 ; Moffett $5.50 ; Limlsey 888.70. How much have all? Ans. $460.55. 62. A merchant bought four adjacent lots of ground for $6850. He built a house thereon which cost $11875. Paid for fences $912 ; for flagging $1819.55 ; for furniture $3481.12. How much did the whole cost? Ans. $24,937.67. 63. If you pay $175 for a horse, $450 for a carriage, $75 for a set of harness, s:;s for a saddle and bridle and $6.50 for a whip. What will the whole cost? Ans. $744.50. 64. A planter has 54 cows, 321 sheep, 174 mules, 23 horses, 42 oxen, 43 calves, 7 colts. How much live stock has he altogether ? Ans. 664. Q - Arithmetical Exercises and Examples. !.">. A merchant bought at one time 250 barrels Flour for 81 ")()() ; at another .'> if) banvls for 8- H5 ; and at another 21)0 barrels for 1625. How many barrels did he buy and what was the total cost 7 Ans. 795 Bbls., $5540 Cost. 66. The weight of ten bales of cotton is as follows : 481, 503, :-ws, 4r>2, 470. IT ( J, mi, :;:T. n;:i, 511 pounds, what is the total weight? Ans. 4565. 67. Bought at one time 43 yards of calico and 32 yards of silk ; at another 104 yards of calico and 24 yards of silk, and at another 96 yards of calico and 48 yards of silk. How many yards of each kind did I buy? Ans. Calico 2415, Silk 104. 68. Paid $425 for a lot of BUgar, s 1 20 i;, r rice and 75 for potatoes. Sold the sugar at a profit of $ H and the rice and potatoes at cost. What did I get for the whole? Ans. 661. 69. From New Orleans to the Iligolets is 31 miles ; hence to Montgomery, 18; hence to Bay St. Louis, 3; hence to Pass Christian, 6 ; hence to Mississippi City, 13 ; hence to Biloxi, 9 ; hence to Ocean Springs, 4 ; hence to East Pascagoula, 16; hence to St. Elmo, 21; hence to Mobile, 20. How many miles to Mobile? Ans. 141. 70. From New Orleans to Kenner is 10 miles ; hence to Manchac, 27 ; hence to Ponchatoula, 11 ; hence to Ham- mond, 4; hence to Amite, 16 ; hence to Tangipahoa, 10 ; hence to Osyka, 10 ; hence to Magnolia, 10 ; hence to Me Comb City, 7; hence to Summit, 3 ; hence to Bogue Chitto, 10 ; hence to Brookhaveu, 10 ; hence to Beauregard, 11 ; hence to Crystal Springs, 19 ; hence to Terry, 9 ; hence to Jackson, 15; hence to Madison, 13; hence to Canton, 11. How many miles is it to Canton ? Ans. 206. 71. A young man paid $125 for a year's tuition at col- lege, $22.50 for books, lost $40, and has $378.35 on hand. How much had he at first? Ans. $565.85. 72. A boy gave Jane 6 oranges. Kate 4, John 3, he ate 2, and had 5 remaining. How many had he at first ? Ans. 20. Examples in Addition. '11 73. Louisiana contains 41 255 square miles ; Mississippi, 47156; Texas, 237504; Arkansas, 52198; Tennessee, 45600; Kentucky, 37680; Alabama, 50722; Georgia, 52009; South Carolina. 293S5 : North CJardifta, 50704; Missouri, 07380; Virginia, r, 1:552: Maryland. 11124: Florida, 592C.8 ; California. 1KS982. How many square miles in the fifteen states? Ans. 1,032,319. 74. The population of London is 3311000; Paris. 1852000; Si. Petersburg, Iili7000 : Pun Janeiro. 2750(10: Constantinople. 400000 ; Vienna. S3 1-000 ; Berlin, S25000 : Lisbon, 224000; IVkin. ir,!SOOO; Tokio or Jeddo, 790- 000; Bomhav. 1117000; Madrid. 332000; (ilasgow, 489000; Dublin, 31 1000; Amsterdam. 27SOOO ; Brussels, 176000; Stockholm. 139000; Copenhagen, 181000; Cairo, (Egypt) 351000; Tunis. 125000. What is the popula- tion of all? Ans. 13,858,000. 75. The lenizth of the Mississippi Hiver is 1200 miles : of the Nile, 4000: Ama/on. 3750 : Yenisei. 3 400 ; ()l,i. 3000: Yang-tse-Kian- 3320; tfiger, 3000 ; Lena, 2700 : Amoor, 2. Lake Sii])erior is 100 miles in Iciiiith . Lake Michi- gan, 320 ; Lake Ihmm, 210; Lake El ie, 240 ; Lake On- tario. 180; Lake Baikal, 375: L-ike Pontehartrain, 40. What is the comhined length oi' all ? Ans. 1795. 77. There are in the world 3910(10000 Christians: 500000000 Buddhists: 1 150000m) Brahmins; 100000000 Confucians; 15000000 Slmdoan : 199000000 Mohamme- dans ; 7000000 Isndites. 1 low many combined ? Ans. 1.3(iO,000.000. 78. Mount Kvei-est of the Himalaya chain in Asia the highest point on the globe, is 29002 feet high; Mt. St. E.ias, the highest mountain in North America, is 17900 feet; -Mt. Illampu, the highest mountain in South America, 28 Arithmetical Exercises and Examples. is 24812 feet; Mt. Blanc, the highest mountain in Europe, is 15780 feet; Mt. Kilima Xj.iro, the highest mountain in Africa, is 200G5 feet; Mt. Koseiusko. the highest mountain in Australia, is 717U feet. What is (lie nunhined heiirht of all? Ans. 114.795 feet. 70. l>v the census of 1 STO. the population of New York was 942992; Philadelphia, 674022; Brooklyn. :J!M>niM) ; St. Louis, 310864 ; Chicago, 2!.77 ; Baltimore, 2U7354; Boston, 2:>or>2i; ; Cincinnati. 2Hi2:!'J: New Orleans'. 19141S: San Francisco, 140473 ; Buffalo, 117714 ; Wash- ington, 100199; Newark, 105059; Louisville, 100753; Mobile, 32034; Galveston, 13818; Memphis, 40226. What is the population of all combined ? . ADS. 4211571)7. 80. On Monday 85482 persons entered the gate -s at the Centennial Exhibition, Philadelphia; on Tuesday. 10S121 : on Wednesday, 98792; on Thursday. HI 9515; on Friday, 103819, and on Saturday, 174587. How many entered in the six days? Ans. (>(;:. ()5 4. 81. The standing army of the United States is liL'OOO , of Great Britain and Ireland, 192000 ; of France, 454000 ; of the German Empire, 402000; of Russia. 7 : hemv t Chucahoula, ft ; hence to Tigerville. 5 ; IUMICC to L'0;i 8 -. 4; hence to Bayou Beuf, 3; hence to Ramos, 3 : benee to Morgan City, 4; hence to Galveston, 240. How many miles to Ualveston ? A us. 321 miles. 89. 24 peaches were eaten, 5 being spoiled, were thrown away, and 32 remained in the basket. How many were there at first ? A us. (51. 90. A man was 2H years of age when lie was married. TIow old will he be when he has been married 1 I years ? AIIS. 1<> years. !H. A young man graduated from college when he was 22 years of age. lie married l> years afterward.-. 2 year- after that he was presented with a son. What will he his age when the son is 21 years old? A us. ,">! year<. 92. A lady paid (f.50 for a dress, $8 for a shawl, $1 for a bonnet and 83.75 for a pair of shoes. What was tho total cost? Ans. 822.2."). 93. A boy sold his pony for $45, and lost 15 by the sale. What did the pony cost him? Ans. $60. 94. A merchant paid for a lot of goods $580, he sold them and gained $190. How much did he receive for them? Ans. 8770. 95. Henry is 16 years old, James is 3 years older, and William is 2 years older than James. How old are James and William? Ans. James 1 ( J, William 21. 96. The internal framework of the human body con- sists of bones, which united by strong ligaments constitute the skeleton. In the skull are 8 bones; in the face 14 ; in each ear 3 ; in the tongue 1 ; in the trunk and spinal column and pelvis 55 ; in each shoulder 2 ; in each arm 3 ; in each wrist 8 ; in the palm of each hand 5 ; in each thumb 2 ; in each finger 3 ; in each leg 4 ; in each ank'e 7 ; in each foot 5 ; in each great toe 2 ; in each of the other toes 3 ; and there are_ 32 teeth. How inaiiy bones in the whole body? Ans. 240, Examples in Addition. 31 97. How many pupils in a school in which there are 6 grades, the first containing 63, the second 58, the third 27, the fourth 41), the fifth 35 and the sixth 24? Ans. 256. 98. Bothick has $420; Conrad has $130 more than Bothick, and Prophet has as much as Bothick and Conrad together. What sum have all three ? Ans. $1940. 99. Keen, Soule and Abbott form a copartnership, Keen invests 83400, Soule $4000, and Abbott $500 more than both Keen and Soule. What is the capital of the linn? Ans. $15,300. 100. A father gave his son seven thousand eight hun- dred dollars ; his daughter nineteen hundred and fifty dol- lars ; and his wife three thousand five hundred more than he gave to both, the son and daughter. What sum did he give away ?- Ans. $23,000. SUBTRACTION, (Decreasing.) 39. Subtraction is the process or operation of finding the difference between two numbers of the same kind. 40. The result obtained by subtraction is called the Difference or.Remainder. 41. The greater number is called the Minuend, which means a number to be decreased. 4'J. The lesser number is called the Subtrahend, winch moans the number to be subtracted. 4:>. The sijjn of subtraction is a horizontal line, . It is read minus and means less. When this sign is placed between two numbers it nu,in> that the number nfte.r it, is to be subtracted trom the nuin- I'cr Injure it. Thus 8 3 is read 8 minus 3. For Subtraction Tables and contracted method^ of sub^ fraction see Soule's Contractions in Numbers. 32 Arithmetical Examples and Exercises. \ I. The sign, ( ), parenthesis, or , vinculum, indi- cate that the numbers included within the parenthesis, or below the vinculum, are to be considered as one, or together. Thus (9+3) 57, or with the vinculum thus 9+3 5 7. 45. ORAL EXERCISES. 1. Commence at 50 and orally count to by continually subtracting 1, thus : 49, 48, 47, 46, 45, etc. 2. Commence at 50 and orally count to by continually subtracting 2, thus : 48, 46, 44, 42, etc. 3. Commence at 50 and orally count to by successively subtracting 3, thus 47, 44, 41, 38, etc. 4. In like manner commence at 50 and subtract respect- ively 4, 5, 6, 7, 8, 9 and 10 until you produce or a num- ber less than the subtracted number, thus 46, 41, 35, 28, etc. 5. Commence at 50 and subtract alternately 2 and 5 until you produce 1, thus, 48, 43, 41, 36, etc. 6. Commence at 50 and subtract alternately 8 and 3 until you produce 6, thus 42, 39, 31, etc. 46. To subtract one number from another irhrti any figure of the subtrahend is less than the corretpondiitg figure of the minuend. 1. From 897 subtract (>41. OPERATION. 897 641 Explanation. First set the numbers p } ^| or gQ-7 with the less under or over the greater, so that units of the same order \\ill ~ , stand in the same column. Then com- 2o6 Lob mence with the units figure and subtract each order separately ; thus, 1 from 7 leaves 6 ; 4 from 9 leaves 5 ; 6 from 8 leaves 2. By this work we obtain the difference or remainder, 256. Subtract the following : Gi) (:*) W (5) (6) 843 384 978 425 9876 521 762 655 679 3456 Subtraction Decreasing. 33 47. 1o subtract one number from another when any figure of the subtrahend is greater than the corresponding figure of the minuend. 1. From 4173 subtract 2345. FIRST OPERATION. Minuend 4173 Subtrahend 2346 Subtrahend 2346 Minuend 4173 Difference 1827 Difference 1827 Explanation. Having written the numbers as in the preceding problem, with the lesser number either above or below the greater, we observe that 6 units cannot be taken from 3 units ; we therefore mentally add 10 to the 3 units making 13 units, and then say 6 from 13 leaves 7; then as we added 10 to the minnend we now mentally add its equivalent, 1 ten, to the tens figure of the subtrahend, and say 5 from 7 leaves 2 ; we next observe that 3 hundreds cannot be taken from 1 hundred, we therefore mentally add 10 hundreds to the 1 hundred making 11 hundreds, and then say !' from 11 leaves 8 ; then having added 10 hundreds to the hundreds figure of the minuend we now mentally add I thousand, the equivalent of the 10 hundreds, to the thousands figure of the subtrahend and say 3 from 4 leaves 1. This completes the operation and gives 1827 as the difference of the two numbers. The addition of 10 to the units and 10 hundreds to the hun- dreds of the minuend, and its equivalent 1 ten and 1 thousand to the tens and thousands columns of the subtrahend, is done upon the principle that the difference between two numbers is the same as the difference between the same two numbers f^unllti incrcasi'd. In all problems of subtraction the operation of adding 10 to the minuend and its equivalent, 1, of the next higher order to the subtrahend is repeated as often as the subtrahend figure is greater than its corresponding minuend figure. To Prove subtraction add the difference or remainder to the subtrahend and if the sum is equal to the -minuend the work may be considered correct, Arithmetical Exercises and Examples. SECOND OPERATION. 11 To -117:5 1Q97 1 j - Explanation* Here we say 8 from 15 , .".,' leaves 7 ; 3 from 4 leaves 1 ; 2 from 2 leaves 0; 1 from 3 leaves 2 ; from 7 leaves 7. 72017 SECOND OPERATION. 73245 122S 72017 Explanation. Here we say 8 and 7 make 15; 3 and 1 make 4; 2 and make 2 ; 1 and 2 make 3 ; and 7 make 7. 3. From 56802 subtract 50531. FIRST OPERATION. 56802 50531 Explanation. Here we say 1 from 2 1 ; 3 from 10, 7 ; G from 8, 2 ; from 6, 6 ; 5 from 5, 0, which being the last figure on the left has no value, and hence is not set. Explanation. Here we say 1 and 1 2 ; 3 and 710 ; and 2 =8 ; and 6=6 ; 5 and 0=5. The naught is not set for the reason given in the first solution. EXAMPLES. Write the following groups of numbers as they are here 6271 SECOND OPERATION. 56802 50531 6271 Subtraction. 31> written and subtract the lesser from the greater of each group : 467 1807 3842 607 3001 6879 342 4251 1291 8013 1009 9640 Subtract the following numbers : 7. From 5307 take 309. Ans. 4998. 8. From 1090 take 1009. Ans. 81. 9. From 7608 take 3705. Ans. 3903. 10. From 184240 take 39460. Ans. 144780. 11. From 41074089 take 1875429. Ans. 39198G60. 12. From 9876543210 take 123456781)0. Ans. 8641975320. 48. To Subtract Dollars and Cents. 1. What is the difference between $483 and $51.65. Ans. $431.35. OPERATION. Explanation. In all problems of this $483.00 kind we first set the numbers in the .- i\.r same manner as when adding dollars and cents, with dollars under dollars and cents under cents, so that units of $431.35 the same order will stand in the same column and the points in a vertical line. When there are no cents in the minuend, we fill the place of cents with naughts. The operation of subtraction is performed with dollars and cents, the same as with other numbers. What is the difference between the numbers in each of the following groups ? $16.25 $8~00 $.75 $4l!o4 $10.50 $L93 9.38 3.75 .59 6.61 4.78 .47 $6.87 $4.25 *3ft Arithmetical Exercises and Example*. $681.85 $127.05 $24S.oo silUl $8527.09 90.38 lo:>.r>n 181.15 !>.s<> 12 1:; 14 IT, 875.00 1971.50 lti-10.10 5184.62 43.50 >.oo 1270.UO 52!). 7S 10. Paid for rice 85500, and fur sugar 80875.40. 1 1 >w much more was paid for sugar than rice ? Ans. 1375.10 17. Bought a lot of flour for $2225, and sold the same for 8'2SOO, what was the gain ? ADS. $575. IS. It is 700 niilos to Shivveport and 320 to (Jalveston. How much farther is it to Shivvepurt than to (Jalveston? Ans. 3SO miles. 10. The ant has fifty eyes, the dra.-on fly 12000 ; how many more has the dragon fly than the ant ? Ans. 11 950 eyes. 20. The total coinage of gold and silver at the different mints of the U. 8. during the fiscal year ending June 30th 1875, was 843,854,708. Of thls-aniount $33,553,965 was g< Id, what was the amount of silver coined. Ans. $10.300,743. 21. A student had 40 problems to work, he worked 17, how many has he yet to work ? Ans. 23. 22. Man has 26 bones in each foot, and 1!> in each hand, how many more has he in the foot than in the hand ? Ans. 7. 23. Sound travels through the air at the rate of 1118 feet per second, and a bullet fired from a rifle travels 1750 feet per second ; how much faster does the ball travel than sound ? Ans. 632 feet per second. 24. Physiologists have determined with the aid of the microscope, that the lungs of man contain not less than 600,000,000 air cells ; they have also determined that a sin- gle drop of human blood contains more than 4jOOOjOOO,000 Subtraction. 37 of corpuscles ; how many more corpuscles in one drop of blood than air cells in the lungs ? Ans. 3,400,000,000. 25. Geologists have demonstrated that the formation of the stalactites and stalagmites in the Mammoth Cave of Kentucky, required not less than 75000 years of time ; and that the wearing away of the rock of Niagara Falls by friction, from Queenstown where they first were after the glacial epoch, to their present location, 7 miles above, required at least 40,000 years ; how much longer did it require to form the stalactites and stalagmites, than for the Falls of Niagara to recede to their present location? Ans. 35000 years. How many years from the date of each of the following events to the present year ? 20. Quills first used for writing IJ30 A. I>. 27. Figures used by the Arabs, borrowed from the Indians, 813 A. D. 2H. High towers first erected on churches, 1000 A. D. 2!). Glass Windows first used in Kn-land, 11 SO A. D. 30. Chimneys built in Kngland, 1230 A. D. 31. Spectacles invented by Spinu. 1299 A. D. 32^_\Voolen cloths first made in England, 1331 A. D. 33. Muskets used in .Knglaml. 1421, A. D. 34. Printing invented, 14 K) A. D. 35. Almanacs first published in Hilda, 1400 A. D. 30. Tobacco discovered in St. Domingo, 1490 A. D. 37. Spinning- wheel invented at Brunswick, 1530 A. D. 33. Needles first made in Kniiland by an Kast Indian, 1545 A. D. 39. Decimal Arithmetic invented at Bruges, 1602 A. D. 40. Circulation of the blood discovered by Harvey, 1619 A. D. 41. Newspapers first published, 1030 A. D. 42. Coffee brought to England, 1041 A. D. 43. Steam engines invented by the Marquis of Wor- cester, 1049 A. D. 44. Cotton first planted in the United States. 1709 A. D. 38' Arithmetical Exercises and Examples. 45. Cotton first spun in America. 1787 A. D. 4G. Steam first used to propel boats by Fulton, in Amer- ica, 1807 A. D. 47. First Locomotive was made at Liverpool, 1820 A. D. H. Electro-Magnetic Telegraphy invented by Morse, of America, IS.'!:* A. D. 4 ( J. America was discovered in 141)2 A. 1). 50. The electric telegraphy was first used in the Tinted States in 1844 A. D. 51. (Jem-rul (Jeorge. Washington was burn in 1732 and died in 171W; (Jeneral 11. H. Lee was born in 1807 and died in 1870. How much older was Ueiieral Washington thaa General Lee, when he died? Ans. 4 years. 52. What is the difference between 23222 and 11 thou- sand 11 hundred and 1 1 ? Ans. 11111. 53. What is the difference between dozen dozen and half a dozen dozen ? Ans. 792. 54. What number must be ndded to G8741 to make a million? Ans. 931251). 55. Philadelphia has 153151 buildings; New Orleans 35600. How many more has Philadelphia than New Orleans? Ans. 117551. 5G. James, who is 23, is 7 years older than Henry; how old is Henry? Ans. lb' years. 57. William has 8500 which is $150 more than I, and I have $75 more than Lewis, how much has Lewis, and how much have I ? Ans. Lewis has $275. I have $350. 58. There are* two parties who owe me $8000, one of them owes $4250. The other wishes to pay me $1700 on account ; how much will he then owe ? Ans. $2050. 59. A speculator bought a lot of apples for $215., and sold them for such a price, that if he had got $22.50 more he would have gained as much as they cost him. How much did he sell them for ? Ans. $407.50. 60. From New Orleans to Vicksburg is 401 miles, and Subtraction. 39 to Natchez 277 miles ; how far is it from Natchez to Vicks- burg? Ans. 124 miles 61. What is the difference between one million, seven- teen thousand and seven, and one thousand sixteen hundred and sixteen ? Ans. 1,014,391. 62. The sum of two numbers is 1463, one of the num- bers is 628, what is the other ? Ans. 835. 63. The velocity of our earth on its yearly voyage through space, around the sun, is 99733 feet per second ; the velocity of a 12 pound cannon ball fired from a gun with an average charge of powder is 1734 feet per second, how many feet farther does the earth travel, in each second, than a cannon ball ? Ans. 97999 feet, or 18 miles and 2959 feet. 64. What number is that to which if 17821 be added the sum will be 37907 ? Ans. 20086. 65. At an election the defeated candidate received 23742 votes; had he received 5112 votes more he would have been elected by 1000 majority; how many votes did the elected candidate receive ? Ans. 278.") I. 66. A father divided his plantation consisting of 4500 acres between his five sons Albert, Edward, William. Frank and Robert. To Albert he ^ave SOO acres; to Edward he gave 150 acres more than he gave Albert; to William he gave 100 acres less than he gave Edward; to Frank he gave as much as he gave I'M ward, and the re- mainder he gave to Robert. How many acres did Robert receive? Ans. 950 acres. I 40 Arithmetical Exercises and Examples. MULTIPLIC ATIO>-( -W. Multiplication is the processor operation of in- creasing one of two numbers as many times as there are units in the other. Or, differently explained, it is a short method of performing addition. The number to be multiplied is called the multiplicand. The number which shows how many times the multipli- cand is to be increased or repeated is called the innlfi/t/irr. The result obtained by the operation of mttltiplyiog is called the Product. The multiplicand and multiplier are railed furffirs. The meaning of the word factor is //< ///,/_/ or pm>/ or fiims. Thus 8 >< >, is read 8 multiplied by 3, or 3 times 8. 51. Principles of Multiplication. In all cases of multiplication the multiplier must -be regarded as an abstract number. Two denominate numbers cannot be multiplied together as denominate numbers. In all multiplication operations the product is the xj 16J32 \>- M 80 '.MM 1 1- 12s 144J160 17J3J 5J 6J 85 78| 91J104J1I7130 84| !)8J112]l2G|140 '.MI I(i:.jl20|13."i r,-{|l70 18J36J5472 ' ..... 8(126J144J162|180 L9|38J57|76 96 114J133J152 I71|190 20]40|6Tl|80 KHI l^n I 1(1,1(11) ISII^IKI Erplanfilion WP rrcomnipnd tliif* taMp as being far superior to the one pre- Bftitod in the School and College Text Nooks of the country, and urge all who apire to proficiency in computing numlci> to learn it. In learning tint table, or in the use of it. we caution the calculator apainet the use of all intermediate words, whether he speak.* or thinks them; thus, instead of saying or thinking, ( J times 3 are 27; 17 thm* r, are lu^, AT., say or think, 9, 3, 27; 17, 6, 102, per curd what will 34 cords of wood oos( ? 9. Paid $4 per barrel for potatoes and bought 47 bar- rels, what did they cost? 10. If you receive 2 per day for labor and work 17 days how much money will you receive ? Solution. Since 1 day's labor is worth $2, 17 days' labor is worth 17 times as much, which is $3i. Or thus, since I receive $2 for 1 day's work, for 17 days' work I will receive 17 limes as much, which is $34. 11. Multiply from times 8 to 15 times 8 and reverse. 12. Multiply from times 9 to 16 times 9 and reverse. 13. Multiply from times 11 to 16 times 11 and reverse. 14. 12 inches make a foot, how many inches in 16 feet ? 15. 4 quarts mako a gallon. How many quarts in a barrel that holds 42 gallons ? 16. What will 6 dozen shirts cost @ $18 per dozen ? 17. If you buy 15 boxes of peaches (a} $2 per box, what will they cost ? 18. Multiply from times 12 to 19 times 12 and reverse. 19. How many are 9 times 12 plus 8? 20. How many are 12 times 7 minus 6 ? 21. If you buy 7 pencils at 5 cents each and hand to Multiplication. 43 the seller 50^, how much change ought you to receive ? 22. A merchant bought 23 barrels of apples at $4 per barrel and paid $65 on account. How much does he still owe ? 53. To multi.ply whwi the multiplier consists of only <: figure. 1. What is the product of 947 multiplied by 6 ? OPERATION. Krplanation. In all problems of this = r : ^ kind we place the multiplier under the E.7 7 units' figure of the multiplicand and i. then commencing with the units figure we say, 6 times 7 are 42, which is 4 Multiplicand 947 / to the column of tens ; we next sa . v 6 times 4 are 24 plus the 4 tens re- tained in the mind, are 28, which is 2 hundreds and 8 *<*, the 8 /<;/.v-we write in the tens column ot the product, and retain in the mind the 2 hundreds to add to the column of hundreds. We then say (> times t> are 54. plus 2 hundreds are ,"G. which is 5 thousand and '> lnnnln In practice, instead of saying U times 7 are 42, G times 4 are 24, etc., we should only name the result of the combination, thus 42, 24, etc. In handling fif/ur?x NV slum/if /////w//,s j>ron<!. ToProvo the operations of multiplication, repeat the work or multiply the multiplier by the multiplicand. If the result is the same as the first, the work is probably correct. EXAMPLES. Perform the following multiplications: j -i Multiplicand 5t:j '.)>:; 27(i!) 7 problem is, since 1 barrel of Hour ',, i " cost $6, 245 barrels will cost 245 MulUplicand I, times as much. The $6 is the real multiplicand, but in the operation #1470 Ans. we used it as the multiplier. This wt> do for convenience in performing the operation, in all pro- blems where the multiplicand is less than the multiplier. The result is the same whichever factor we use as a multiplier. 18. What will 42 dozen hats cost at $9 per dnzen ? Ans. TJ. At $7 a piece what will 48 chairs cost ? A us. Multiplication. 45 55. To multiply when the multiplier consists of more than one figure. 1. What is the product of 397 multiplied by 653 ? . S*| = * s ss .= = ? '3 Multiplicand ' 397 Multiplier 653 1st Partial product by 3 units 11 $\=3 times the multiplicand. 2d Partial product by 5 tens 1985 =50 times " 3d " " 6 h'ds- 2382 =600 " " Total product 259,241= 653 " Ksplanation. In all problems of this kind we first write the multiplier under the multiplicand so that units of the same order will stand in the same column, and then multiply by one figure at a time. We first multiply by the units figure, then the /<;/.*, hurn/rrt/A and so on in regular order through the multiplier and add the several partial products together and thus obtain the required product. In this problem we first multiply by .?, the units figure, in the same manner as explained in the first problem where there was but one figure in the multiplier, and obtain 1191 as the first partial product. This we write below the multiplier so that units of the same order will stand in the same column. Next we multiply by the 5 tens ; we say 5 times 7 are 35, which is 3 hundreds and 5 tens ; we write the 5 tens in the tens column directly below the multiplying figure and reierve in the mind the 3 hundreds to add to the hundreds column. We then say 5 times 9 are 45 -f- 3 hundreds which were reserved are 48 hun- dreds which is 4 thousands and 8 hundreds; we write the 8 hundreds in the column of hundreds and reserve the 4 thous- ands to add to the thousands column. We then say 5 times 3 are 15 plus 4 thousands, reserved, are 19 thousands, which is 1 ten thousand and 9 thousands, which we write in tlmir respect- ive columns. We then in like manner multiply by the 6 hundreds in the multiplier, being careful to write the first figure obtained (2) in the hundreds column, directly under the G of the multiplier, and the other figures in their respective columns, thousands, ten K > Arithmetical Exercises and Examples. th. Multiply 1208 by 1020. I). Multiply DIMM) by 707. 7. Multiply 2:;:)0o by i2o:;o. 5. Multiply 1000 by IJ20S. <). Multiply SI 00!) by <)0200. 10. Multiply 45U7H by 57SO. 11. Multiply !)>7000 by 4!>. ,">7. T<* multiply ly the /'c/r/o/-.s < t f u NOTK. FaM'tors of a nuinbiT are such numbers as will wht3ii multiplie I together proluoe the numhor. 'J'htis <; and (J are the factors of o<> ; 7 and 8 are the factors of 5f>, or it is a number that will exactly divide a number. 1. Multiply 2435 by 42. OPERATION. >4;-f, Explanation. In all problems of this 1 kind we separate the multiplier into two or more factors and multiply the multi- plicand by one of the factors and the 17045 resulting product by another factor and (J so on until we have used all the factors. The last product will be the correct pro- duct. 102270 2. Multiply 781 by 63. :*. Multiply 3140 by 36. 4. Multiply 588 by 81. 5. Multiply 480 by 361. 6. Multiply 1756 by 125 7. Multiply 3281 by 128 58. To multiply when the Multiplicand or multiplier con- tains dollars and cents. Multiplication. 49 1. Multiply $342.15 by 6. OPERATION. Explanation. In all problems of $342 15 *^ s kind we multiply in the regu- lar manner and then prefix the dollar sign $ and place the p<^it (.) two places from the right. Wir Product $2052.1)0 answer is then in dollars and cents. EXAMPLES. 2. What will 1082 pounds of sugar cost at 9/ per pound ? Ans. $151.38. 3. A merchant's monthly expenses are $1342.75. What are they for 12 months?. ' Ans. $1 Gil 3.00 4. It costs a family $2.30 a day for marketing, what will be the expense for 30 days ? Ans. 861UM). 5. What will 37 boxes oranges cost at 83.75 per box? Ans. $138.75. (>. At 16 cents per pound what is the value of 23780 pounds Cotton ? Ans. $3804.80. 7. If it costs $17500 to construct one mile of railroad what would be the cost to build 3(J4 miles .' Ans. sr.:;70ooo. 8! What will S75 tons of railroad iron cost, at $55 per ton ? Ans. 4S125. !>. Multiply one million and twenty-six by nineteen thousand seven hundred and ten. Ans. 11)710512460. 10. One cubic foot contains 1728 cubic inches. How many cuijic inches in 324 cubic feet ? Ans. 559872. 11. One square foot contains 144 square inches. How many square inches in !>5 square feet? Ans. 13680. 12. One gallon contains 231 cubic inches. How many cubic inches in a cistern that holds 3500 gallons ? Ans. 808500. 13. One bushel contains 2150.42 cubic inches. How many cubic inches in 20 bushels ? Ans. 43008.40. 14. One mile contains 5280 feet. How many feet in 25 miles? Ans. 132000. r>n Arithmetical Exercises and Examples. 15. One year contains :>r>5 days. How many days in 21 years? Ans. 7665. 1(>. The human heart beats 4200 times an hour. How many times does it boat in 10 years, there being 24 hours in one day and :*i;5 day.- in each \var? Ans. .'Ji7i^OUUO. 17. Sound travels 11 IS foot per second. How far will it travel in 10 minutes, there boini; 60 seconds in a minute. Ans. 670800 feet. 1 S. Light (ravels 1 H2500 miles per second. How many miles will it travel in 1 day, there being 24 hours in a day, 60 minutes in an hour, and GO seconds in a minute. ^ Ans. 16,632,000,000. It). A railroad train runs 25 miles an hour. How far will it uu in :J days, allowing 3 hours for lost time in stoppa.L-. Ans. 1725. 20. 1.1' a person respire 20 times in a minute, how many times will he breathe in a day? Ans. 28,800. 21. If a person inhales 1 gallon of air at each respira- tion, and respires 20 times per minute, how many gallons will he inhale in 24 hours. Ans. 28800. 22. At 17 per ounce what is the worth of 9 pounds of uold, there being 12 ounces in a pound Troy or Mint weight? Ans.. $1836. 23. How many pounds of coffee in 180 bags if each bag contains 162 pounds? Ans. 29160. 24. How many pounds of cotton in 87 bales, if each bale weighs 475 pounds ? Ans. 41325. 25. What will 27893 pounds of tobacco cost at 56 cents per pound ? Ans. $15,620.08. 26. What will 1870 acres of land cost at $18 per acre ? Ans. $33,660. 27. The Senate and House of Representatives of the State of Louisiana consists of 138 members who receive $8 per day. The regular session continues 60 days. What is the yearly expense for the salaries of the State's law makers? Ans. $66240. 27. A contractor has 865 men employed at $1.50 per day. What are the weekly wages of all for 6 days' labor? Ans. $7785. Multiplication. 51 28. What will it cost to build 37428 cubic yards of levee at 45 cents per cubic yard ? Ans. $16842.60. 29. A steamboat arrives with 3840 bales of cotton ; 1320 sacks cotton seed and 580 barrels molasses. Her freight charges are $2 per bale for cotton, 25/ per sack far cotton seed and 50/ per barrel for molasses. What is the amount of her freight bills? Ans. $8300. 30. A drayman charges 75 cents a load, and he has hauled 63 loads. How much is due him ? Ans. 847.25. 31. What will it cost to slate the roof of a house contain- ing 52 squares at $13.25 per square ? Ans. $689. 32. The walks around a dwelling contain 129 square yards. What will it cost to flag them with German flans at $3.10 per square yard? Ans. $399.90. 33. What will it cost to pave a street containing 20000 square yards, with stone at $4.75 per square yard ? Ans. $95000. 34. Bought 2180 barrels of coal at 4S/ per barrel. What was the cost? Ans. 104ti.4o. 35. Multiply 5 billions and 16 ly 5 millions and 1 thousand. Ans. 25,005,000,080,016,000. 36. A Hogshead of sugar contains 10S5 pounds; how many pounds in 107 hogsheads of equal weight ? 37. A planter produced 68 bales of cotton, if the average weight of the bales was 460 pounds, and the cotton sold for 13 cents per pound, bow much money would it bring? Ans. $4,066.40 38. What will 3 cases containing 2 dozen pairs each of shoes cost (a) $2.90 per pair ? Ans. 2tS.sn. 39. If it costs $1.50 a day to support one person, what will it cost to support a family of 13 for one year or .'>(>.") days? Ans. $7117.50. 40. There are 35600 dwellings in New Orleans, allow- ing 7 persons to each dwelling, what would be the popula- tion of the city ? Ans. 249200. 41. A merchant sold thrw dor.cn dozen ladies' hose at 52 Arithmetical Exercises and Examples. one quarter of a <1<>\< n :, , t cents a pair. How much did he receive fur them? A us. 155.52 42. The pressure of tli o atmosphere is 15 puunds on every square inch nf surface. The exterior surface of a m;in of average size is aliout 2501} square inches. How many pounds weight does he sustain ? Ans. .'J7500 pounds. 43. How many dollars aiv .'>7-") *lo o-,,l,l pieces worth? Ans. $-J750. 44. What is the value uf 21 -HI dimes? Ans. 82 14. (JO -IT). AYhat is the valucof 1010 ,,uar. dol. Ans. $252.50 4(>. What is the value of 72S nirkels ? Ans. s.'ili.lO -17. What is the value of 1612 hall 1 , dol. Ana. ssou.oo 48. During the fiscal year ending Sept. 1, ls7i>, there was received .'501 Si hn^slu-ads nf Tuhaeeu. 11' each hlid. contained 12 pounds of poison, how many pounds of poison were there in the whole? Ans. .".U2172. 49. The circumfer'-nce of the earth is nearly 25000 miles, the distance to the sun is .'WOO times as many miles. How far is it to the sun ? Ans. 95000060. 50. -1S75 is the thirteenth part of a number. What is the number? Ans. (l!5!7r>. 51. The sun is loSl.^oo nines as large aft the earth; the earth is 4f> times as larire as the moon. How many times is the sun larger than the moon ? Ans. 62302500. ___ 52. Lio-ht travels l!)2.")00 miles a second and it requires 100000 years to travel to us from some of the fixed stars that are seen with the telescope. Allowing !>(>.') days, 5 hours, 48 minutes and 41) seconds to a year and remembering that there are 24 hours in a day, (JO minutes in an hour and 60 seconds in a minute, how far distant arc such stars? Ans. 607470883250000000 miles. 53. A man's receipts are $1800 a year and his disburse- ments are 1125 a year. How much arc his net receipts in 3 years? Ans. 2025. 54. It is estimated by Astronomers that 7500000 vis- ible meteors fall upon the earth daily ; it is also estimated that the average weight of each is 100 grains. From thcs<- Division Decreasing. 53 figures and allowing 365 days to the year, what is the annual growth of the earth in weight by the accession of the visible meteoric matter ? Ans. 273750000000 grains. DIVISION. (Decreasing.) 59. Division is the process of finding how many times one number is equal to another. Or it is the process of find- ing one of the factors of a given product when the other factor is known. 60. The Dividend is the number to be divided or it is the number to be measured. 61. The Divisor is the number by which we divide or it is the number used as a unit of measure. 62. The Quotient is the result of the division, and shows how many times the dividend is equal to the divisor. 63. The Remainder is the number left after dividing dividends, which are not multiples of the divisor, or which are not an exact number of times equal to the divisor. It * must always be less than the divisor. 64. The Sign Of Division is a horizontal line with a point above and below, thus -f-. It is read divided l>y ; and it indicates that the number before it, is to be divided by the number after it ; thus 25 -j- 5, is read 25 divided by 5. The horizontal line, and the vertical or curved line when placed between two numbers also indicates division. Thus, - 3 j 6 , 4|36 or 4)36, are all read 36 divided by 4. 65. PRINCIPLES OF DIVISION. 1. When the divisor and dividend are both denominate or both abstract numbers, the quotient will be an abstract number. 2. When the divisor is an abstract number and the dividend a denominate number, the quotient will be a denominate number. 3. When there is a remainder it is a part of the divi- dend and, is therefore the same in name or kind. B* 54 Arithmetical Exercises and Examples. 4. Multiplying the dividend or dividing the divisor i))nltij)/irs the quotient. 5. Dividing the dividend or multiplying the divisor divides the quotient. (5. Multiplying or dividing both the divisor and divi- dend by the same number does not change the quotient. 66. Prnnf of Division. Multiply the quotient by the divisor and if there is no remainder the product should he equal to the dividend ; when there is a remainder add it to the product, and it' the work is correct the sum will equal the dividend. I >i vision operations may be performed by the process of addition or subtraction. Hut as tlies processes are too lengthy for practical purposes, we will not give them place here. For contracted methods in division, see Sonle's Con- tractions in Numbers. 1. 3. 4. 5. 6. 7, 8. 9. 10. 11. 12. 13. 14. 15. 16. 17, 67. ORAL EXERCISES. How many times is equal to 1 ? or 1 " " 1 u 0?or 1 Ans. An infinite number of times. How many times is 1 equal to 1 ? or 1 2 " 1 ? or 2 " 3 " 1 ? or 3 " " 4 " 2 ? or 4- " " 8 " 2 ? or 8- " " !l " :*? or 9 " " 12 u 4? or 12 " 20 " 5? or 20- " 24 " 6 ? or 24 -35 " 7 ? or 35 " " 56 " 8 ? or 56- " 63 9 ? or 63 72 80 88 96 9 ? or 72 10 ? or SO- 11 ? or 88- 12 ? or 96 = ? Division Fractional Numbers. 55 19. 3g 6 -=? 4)42=? 9)45=? 77-=- 7? -%*=? 6)48=? 5)55=? 8412? 20. How many times is 24 equal to 3, to 4, to 6, to 8, to 12, to 24? 21. How many times is 36 equal to 3, to 4, to 6, to 9, to 12, to 36? 22. How many times is 42 equal to 2, to 6, to 7, to 42 ? 23. " " 64 " 2, to 4, to 8, to 64 ? 24. " " 72 " 2, to 8, to 9, to 72 ? 68. FRACTIONAL NUMBERS. When we divide a unit or a number of units of any kind into equal parts, these parts are sometimes called frac- tions. The name of the equal parts varies according to the number of parts into which the thing or number was divided. When the unit or number is divided into 2 equal parts 1 of the parts is called om--h Arithmetical Exercises and Examples. EXAMPLES. 1 . If 3 hats cost 8l> what will 1 hat cost ? . Ans. 2. Analytic solution. Since 3 hats cost $0, 1 hat will cost J part of SJ, which i L > . If 8 yards cost 56 cents what will 1 yard cost ? :>. Paid *:>< for (> barn-Is of flour, what did 1 bam-1 cost ? 4. gallons of molasses cost 4.50, what did 1 gallon cost? AHS. 50/. 5. Bought 12 shirts for $30, how much did 1 cost? Ans. $2.50. (>. Paid SI. 00 for 8 pounds of sugar, what was the price per pound ? Ans. &.12]. 7. 7 dozen oranges cost $2.10, what was the price per dozen? Ans. 8. .'Jo. 8. Bought 20 peaches for 60^, how much did 1 peach cost? Ans. $.03. 9. At $2 a yard how many yards can you buy for $'1 1 ? Ans. 12 yards. Analytic solution. Since $2 buy 1 yard, $1 will buy .] of a yard, and $24 will buy 24 times J a yard, which is, y or 12 yards. Or thus. Since $2 buy 1 yard, for $24 we can buy as many yards as $24 is equal to $2, which is 12 times. 10. At 9 cents per pound how many pounds can be bought for 45 cents ? Ans. 5 pounds. Analytic solution. Since 9 cents buy 1 pound, 1 cent will buy ^ of a pound, and 45 cents will buy 45 times ^ of a pound, which are -\ 5 - or 5 pounds. 11. Flour is worth 8 per barrel, how many barrels can be purchased for $56 ? Ans. 7 barrels. Analytic solution. Since $8 buy 1 barrel, $1 will buy J of a barrel, and $56 will buy 56 times J of a barrel, which are -% 6 or 7 barrels. 12. For $,95 how many papers can you buy at 5 cents a paper? Ans. 19 papers. Short Division. 57 13. If 25 cents buy 1 yard how many yards will 75 cents buy ? Ans. 3 yards. 14. At $3 a piece how many chairs can be bought for $36? Ans. 12 chairs. 15. If the printer charges 1.50 to set 1 page of this book, how many pages can be set for $75 ? Ans. 50 pages. WRITTEN EXERCISES. 69. To divide irJten the divisor docs not exceed 12. 1. Divide 3048 by 5. OPERATION. Kffhniation. In all problems of Divisor 5) 3048 dividend this kind we write the numbers as shown in the operation, and then begin on the left of the dividend Quotient 729 and 3rem. to (livide> We bc?in on the left in order to carry the remainder, it' any, of the higher order of units to the next lower order. In this problem we first take the 3 (thousands,) and as it is not equal to 5, we therefore unite it with the <> hundreds, making 36 hundreds, which by trial multiplication and subtraction mentally performed, we find is equal to 5, 7 (hundreds) times and 1 remainder; the 7 we write in the hundreds column of the quotient line, directly under the > the last figure used of the dividend ; then to the 1 remainder we mentally annex the -1 tens, making 14 tens, as the second partial dividend, and which by mental multiplication and subtraction, we find is equal to 5, 2 (tens) times and 4 remainder; the 2 we write in the tens column of the quotient line, and to the 4 we mentally annex the units figure of the dividend, making 48 units as the third and last partial dividend ; this we find, by mental multiplication and subtraction to be equal to i">, !> times and 3 remainder. The remainder is usually expressed fractionally by writing it over the divisor, thus 2, this expresses the part of a unit of times that the remainder is equal to the divisor. SHORT DIVISION". Operations in division according to the foregoing method are called short divixittn, because tlu i multiplication and subtraction work in finding the remainder of the partial dividends were mentally performed. 2. II ow many times is 840 er\ '7'-*Q-' />nr 7 tion and commence to divide as fttU ^Vo explained in the first written ex- '- ample. But as the divisor is too large to be conveniently used men- 1 S7 tally, we therefore write tho oper- jgQ ation of multiplying the divisor by the quotient figures, and sub- ^ . , ttacting the successive products 7 remainder f rom t ne several partial dividends. In performing the division we first see that 7, (thousands) are not equal to 36, and hence there will be no thousands in the quotient. We then annex to the 7 thousands the 3 hundreds, making 73 hundreds as the first partial dividend; this is equal to 30, 2 times, and a remainder; we write the 2 in the hundreds column of the quotient, multiply the divisor by it, write the product under and subtract the same from the 73 hundreds of the dividend. This work gives us 1 hundred remainder, to which we annex the 8 tens, making 18 tens as the second partial dividend ; this partial dividend not being equal to 36, we write 00 Arithmetical Exercises and Examples. (no tens) in the tens column of the quotient, ami annex to the 18 tons the 7 units, making 187 units as the third and last partial dividend. This is equal to 36, 5 times and a remainder, \ve write the 5 in the quotient, and multiply and subtract as we did with the first obtained figure of the quotient, and thus pro- duce 7 remainder, which we write over the divisor as explained in short division. LONG DIVISION. Operations in division, according to the above method, are called long tl iris fun, for the reason that the multiplica- tion and subtraction work in finding the remainders of the partial dividends is written. 2. How many times is 66804 equal to 5'1 ? OPERATION Divisor Dividend 53) i;r,sn4 0-< ; 53 138 106 Proof. 1260 Quotient, 53 Divisor. 3780 6300 24 Remainder. 320 318 24 3. What is the quotient of 107941 --396? OPERATION. 396)107941(272 Quotient. 792 2874 2772 1021 792 229 Remainder. 66804 Dividend. 4. Divide 7167901 by 11 207. OPERATION. 11267)7167901(636 Quoti't. 67602 40770 33801 69691 67602 2089 Remainder. Long Division. 61 5. Divide 784 by 82. STATEMENT. 82)784(9|f Ans. 6. Divide 91070 by 8761. STATEMENT. 8761)91070(10-fff Ans. 7. Divide 2461 by 74. 8. Divide 4809 by 91. 9. Divide 13872 by 263. 10. Divide 54123 by 1423. 11. Divide 628100 by 156. 12. Divide 10000 by 304. 13. Divide 37021 by 2002. 4 Divide 8888888 by 332211. Divide $6805 equally between 5 men, and what will be the share of each ? Ans. 1361. 16. What is the sir.iy-fniirth part of $44800? Ans. $700. 17. 145 men picked 1305000 pounds of cotton, sup- posing they all picked an equal quantity, how much did one man pick ? Ans. 9000 pounds. 18. A father gave his 7 sons a Christmas present of 1353.50 to l>c shared equally, what was each one's share? Aus. $50.50. 71. To divide w/trn th<*i-< r> nnnylitu on the right of tin 1 divisor. 1. Divide 2843 by 200. Ans. 14^fr OPERATION. Explanation. Since by our scale 'M))2843( of n m bers tnc y increase from I ' ~* ( __ right to left in a tenfold ratio, and ~~ decrease from left to right in a 14 and 4.5 Kern, corresponding manner, it is clear t.h:it the removal of any order of figures from left to right dimin- ishes its value ten times for each place of removal. And as previously shown, that the annexing of naughts multiplies num- bers, by removing them to places of higher value, so in like manner cutting figures off from the right of a number removes the remaining orders to the right, and hence decreases them tenfold for every figure cut off. Hence to cut off one figure is dividing by 10 ; to cut off two figures divides by 100 ; to cut off three figures divides by 1000 and so on. 62 Arithmetical Exercises and Examples. Considering these principles, in all cases of this kind we cut off the naughts from the right of the divisor and the same num- ber of figures from the right of the dividend ; and then divide the remaining figures of the dividend by the remaining figun-s of the divisor. When there is a remainder annex the figures nit, off, and we obtain the true remainder. 2. Divide S7JK51 by 1000. Ans. 87 T Vu- OPERATION. 1|000) 87(931 Quotient 87 and 931 Remainder. 3. Divide 178 by 10. I 4. Divide 6581 by :;on. OPERATION. OPERATION. 10;17S 3 00)65 H Quotient 21 2S1 Rein. Ans. LM Quotient 17 8 Remainder Ans. 17 /V 6. Divide 714G8071 by'.341000. OPERATION. Ans. 682 3268 3069 6. 7. 8. 9. 10. 199 Divide 8897600 by 8100. Divide 1000000 " 10000. Divide 99999 by 9000. Divide 33440 by 270. Divide 140817 by 6800. Ans. 1098-ff. Ans. 100. Ans. ll-fffo. Ans. 123ffg, Ans. 20f ffrf Division. 63 72. To divide by the Factors of a number. 1. Divide 936 by 24. Explanation. In ail problems OPERATION. where the divisor is a compos- 4)936 ite number we may divide by the factors and thus shorten the operation In this example the factors are 4 and 6, and we first divide by 4 which gives a quo- 39 tient 6 times too large, for the reason that 4 is but J of 24 the true divisor. We therefore divide this quotient by 6 and obtain the true quotient. 2. Divide 588 by 28. The factors are 4 and 7. ADS. 21. 3. Divide 6976 by 32. The factors are 4 and 8. Ans. 218. 4. Divide 2583 by 63. The factors are 7 and 9. Ans. 41. 5. Divide 10206 by 81. The factors are 9 and 9. Ans. 126. 6. Divide 11984 by 56. The factors are 8 and 7. Ans. 214. 7. Divide^ 1607 by 72, using the factors 3, 4 and 6, and find the true 'remainder. Ans. 22 quotient, and 23 remainder. FIRST OPERATION. 3^) 1607 Explanation In this ex- ' ample using as divisors 3, . 4 and 6, the factors of 72. 4)535 2, 1st remainder, we obtain for remainders 2, 3 and 1. 6) 133 3, 2d remainder. The first remainder 2, is clearly units of the given 9> i Qrl * v, ; 1 dividend, and hence a part 1, 3d remainder. of the tr ' ue remainder / The second remainder, 3 being fourths of the second dividend. 535 which are reciprocal thirds of the given dividend, it is hence | of the reciprocal of J of J 9, of the given dividend and true remainder. 41 The third remainder, 1 being sixths of the third dividend 133, which are reciprocal twelfths of the given dividend, it is hence J of the reciprocal of J of ^ of ^ 12 of the given dividend G4 Arithmetical Exercises and Examples. and true remainder. Therefore 2, the first remainder, plus 0, the unit value of the second remainder, plus 12, the unit value of the third remainder =_ 23, the true remainder. Or we may obtain the true remainder without considering the reciprocal relationship of the quotients ami divisors, tlni> : First remainder.' _' Plus 2d, remainder 3. X tnc preceding divisor 3, = ! Plus 3d, remainder 1, > x ft U tlu ' preceding divisors, 4 and 3= 12 which added gives the true remainder 23 From the foregoing we see that the true remainder may be obtained by adding to the first remainder the product of the other remainders by all the divisors preceding the one which produced it. 8. Divide 7851 by ini: tlu> factors S and S. Ans. l'2'2 quoti. -nt. 4i> remainder. OPERATION. Ks/'ftimrfinn. Here the 1st re- 8)7851 mainder is 3, to which we add the ' _ product of the 2d remainder f>, . multiplied by the preceding divi- 3, 1st; remainder. sor 8j equals 40, making 43, the true remainder. 1225, 2d remainder. 9. Divide 17803 by 96, using the factor* 2, 3, 4 and 4. Ans. IK, OPERATION. Explanation. 2)17803 ' __ 1st remainder 3)8901 1 2d remainder 3X3X 2 18 4^2967 3d remainder IX^X^X^^= 24 4)7413 True Remainder 43 ' 1851 10. Divide 27865 by the factors of 81. Ans. 344 g\. 11. Divide 101041 by the factors of 84. Ans. 1202|| Division. 65 12. Divide 899 by the factors of 108. Ans. 13. If $4691 are divided equally between 35 men, what will each one receive ? Ans. $134^. 14. There are 32 quarts in one bushel, how many bushels are there in 1536 quarts ? Aus. 48 bushels. 15. A hogshead of wine contains 63 gallons. How many hogsheads in 2898 gallons ? Ans. 46 hogsheads. 16. One of the factors of 10800 is 225 ; what is the other? Ans. 48. 17. What number multiplied by 137 will give 959137 fbrjhe_product ? Ans. 7001. ""18. Multiplying 372 by an unknown number gives 44640 ; what is the number? Ans. 120. 19. What is the quotient of 9126 divided by 9 ? Ans. 1014. 20. Divide four million, eight thousand and sixteen by MMDCXLIV. Ans. ISlSfffl 21. What number is that to which, if sixteen be added the sum multiplied by 8 and 13 substracted from the pro- duct the remainder will be 33!) ? Ans. 2S. 22. Theie is a number from which if you subtract 55, and divide the remainder by 12, your quotient will be 36. What is that number? Ans. 487. 23. A merchant owes a debt of 1 < S 7.">, which he agreed to pay by weekly installments ot 825. He has made 55 pavments, how many more payments has he to make. Ans. 20. 24. A merchant bought 350 barrels of flour at $6 a barrel, and sold it at $7.50 per barrel. The gain he gave in equal parts to 4 worthy boys to aid them in obtaining an education. What was the cost and selling price of the flour, and how much money did each boy receive. Ans. 82100 cost, 2625 selling price,$131.25 each boy received. 25. An acre contains 160 square rods ; how many acres in a plantation containing 123200 square rods? Ans. 770 acres^ 66 Arithmetical Exercises and Examples. 2('>. A boy sold 50 oranges at 5^ each and thereby gained $1.50. At what rate did he buy the oranges? A i is. 2/ a piece. 27. How many times 13G will produce 1708? Ans. i:^. IN. Dividejhe product of 750 and 875 by their differ- ence. Ans. 525o. 21). The diameter of the earth at the equator is 71)25 miles ; how long would it take a locomotive to travel that distance at the rate >f 25 miles an hour? Ans. 317 hours 13 days 5 hours. 30. The first Atlantic Telegraph Cable as originally made cost $125^250. 10 miles of deep sea cable was made at a cost of 81450 j H >r mile, and 25 miles of shore ends was made at a. cost of $1250 per mile. The remainder cost $485 per mile. How many miles of Cable were made ? ^ Ans. 25i 55 mile,-. 31. A grocer wishes to put 3335 pounds of sugar in 3 kinds "of boxes, containing respectively 20, 50 and 75 pounds, using the same number of boxes of each kind or size. How many boxes will he require ? Ans. 23 of each size. 32. The Northern Pacific Railroad from Lake Superior to Puget Sound, as located, is 2000 miles long. The esti- mated co*t and equipment of the road, including interest i- > ^5277000. What will be the average cost per mile ? Ans. $42638.50. 33. It is estimated that, by reason of intemperance the United States loses annually $08400000. How many School Houses costing $5000 each, and how many Libraries costing $3000 could be established with this amount of money? Ans. 12300 of each. 34. ^Ten freedmen agreed to pick 20000 pounds of cot- ton and receive for their labor I of the cotton picked. After they had picked 7000 pounds 4 freedmen quit, leaving the other 6 to finish the work. How much cotton i> each entitled to when the work is finished ? Ans. 140 pounds each for those who left, ami 573f each for those who remained. Divison. . 67 35. A merchant bought 800 gallons of molasses at and sold J of it at 72^ a gallon. From the profit he bought his children a set of Cutter's Anatomical and Phy- siological charts, and had $8.20 left. What did the charts cost? Ans. $19.80 36. The capacity of steam engines is measured by horse power ; and 1 horse power is a force that will raise 33000 pounds 1 foot in 1 minute. How many horse power has a steam engine that possesses a capacity of 1188000 pounds? Ans. 36. 37. The average weight of man is 150 pounds. About \ of this weight is blood. Allowing that the heart throws out 2 ounces of blood at each pulsation, and that it beats 72 times a minute, and that 16 ounces make a pound, how long will it take the heart to circulate all the blood in the body ? Ans. 3|^ minutes. 38. Prof. Wilson, a physician and physiologist, has counted in the skin of the palm of the hand 3528 perspi- ratory pores to [the square inch ; but as there are less to the square inch on some other parts of the body, he esti- mates that 2800 is a fair average to allow to the square inch for the whole surface of the body. The average size man has 2 ")()() 5000. Of this an:uunt $3300000 \\vrc -ivm to the public schools of the South. What part of the whole spc-iliid donation did he gives to the South ? v... 8800000 ' Ans - b ;;i.v 4'2. Stephen (Jinml, of Philadelphia, gave SI;Ow many gal- lons of each are iherc in a room 2'2 feet long and 21 leet wide and 10 feet high, which contains IM^UO gallons of air? Ans. (JIU2 Oxygen. L'Tn'iS Nitrogen. 44. A room contains iM-^liO gallons of air, a man inhales u'OO gallons per hour, how long will it take for 10 men to inhale the air in the room. Ans. .") ( |;";|;;;- hours. 4,"). A room 1(5 feet long, 10 feet wide, and 8 feet high, contains 12SO cubic feet of air. Every time a person breathes he throws out from his lungs a sufficient quantity of carbonic acid, or carbon di-oxide, (a most deadly gas.) to pollute or render poisonous and unfit for breathing 3 cubic feet of air, and he breathes '20 times a minute. How long- will it take for the air of a room of the above dimen- sions to become poisonous if occupied by 5 persons, and DO change of air is made by ventilation. Ans. 4-3%-^ minutes. 46. A man produces by breathing at least 6 gallons of carbonic acid gas every minute, a single burning gas jet, 10 gallons, an ordinary stove, 60 gallons, How many gallons Division. 69 of carbonic acid gas will an audience of 1000 people, 2 heated stoves, and 50 burning gas jets produce in 3 hours, and how many times would the quantity fill a room 100 feet long, 50 feet wide and 30 feet high ? Ans. 1191600 gallons. l^WoVA time - NOTE. Theie are 60 minutes in an hour, 231 cubic inches in a gallon, and 1728 cubic inches in a cubic foot. 47. Astronomers estimate that 7500000 visible meteors fall upon the earth daily, the average weight of which is estimated to to 100 grains. Allowing for an equal quan- tity of matter to be brought down by the invisible meteors and the serolhes, how many pounds a year does our earth increase in weight, there being 7000 grains in a pound, and 365 days in a year? Ans. 78214285f pounds. 73. PROBLEMS INVOLVING THE ENGLISH MONEY OF ACCOUNT. 1. What will 13840 pounds of cotton cost at 8 pence a pound. Ans. 461. 6s. 8d. OPERATION. Estimation. In this problem the 13840 price is given in one of the subdivi- o * sions of the English monetary unit, and hence we must know what that unit and its subdivisions are, before 12) 110720d. we can solve the problem. The En- glish monetary unit is the Pound Ster- 20) 9226 8d liuff, which is divided into 20 Shillings ; each shilling is divided into 12 Pen- " nies, and each penny into 4 Farthings. uS- With this knowledge of English money we can work all problems of the above character. In this example we first multiply the price of one pound by the num- ber of pounds and thus produce the value of the whole in pence. Then to reduce the pence to shillings, we divide them by 12, and obtain 9*22(5 shillings and a remainder of 8, which being a part of the dividend is therefore 8d. Then to reduce the shillings to pounds we divide them by 20, and obtain 4GI pounds and a remainder of 6, which being a part of the second dividend is therefore 6s. N the English monetary system the following abbreviations are used : . represents pounds, s. represents shillings, d. represents pence, and f. represents far- things. 70 Arithmetical Exercises and Examples. '1. What is the value of 3. What will 241 boxee 483 yards of cloth at 1(J shil- cheese cost at 3 per box ? ling per yard V Ans. JC3Sfi. 8s. OPERATK li r72 shillings Ans. .C723. OPERATION. 241 3 723 pounds. 386 8s. I. Sold 4S(' yards of calico at 5 pence a yard, what did it amount to? Ans. .10 2s. (id. T>. Bought 38495 pounds of good middling cotton at 7 pence a pound. .How much did it CM - Ans. 1122 15a :>d. U. What is the value of S,">0 ham-Is ol' flour at 34 shillings a harrel ? Ans. 14-1."). 7. How much will 1S12 tons of iron cost at 52, 4s. per ton? Ans. !l4r>S(j 8s. 8. Bought 3> 121 pounds of cotton at 9 pence per pound what did it cost? Ans. C1440 15s. 9d. 74. MISCELLANKors PROBLEMS INVOLVING THE I'HIN- CIl'LKS OK ADDITION, SUBTRACTION, MULTIPLICA- TION AM) DIVISION'. 1. The subtrahend is 210, and the remainder 184, what is the minuend ? Ans. 400. 2. A irrocer paid 8350 for some tea and coffee ; for the tea he paid $50 more than for the coffee, what did he pay for each ? Ans. tea 8200, coffee $150. 3. John has 25 cents, and James has four times as many lacking 10 cents, how many cents has James? Ans. 90 cents. 4. A slate cost 15 cents; an arithmetic four times as much as the slate, and a philosoj hy twice as much, lacking 25 cents, as the slate and arithmetic. What did they all cost? Ans. $2.00. Division, 71 B. The sum of two numbers is 480, and their difference is 80, what are the numbers ? Ans 200, 280. 6. A man purchased a horse and cow. For the horse he paid $175, and for the cow $110 less than for the horse, what did the cow cost ? Ans. 65. 7. The less of two numbers is 224 and their difference 100, what is the greater? Ans. 324. 8. The product of two numbers is G450, and one of the numbers is 150, what is the other? Aus. 43. 9. A merchant bought 415 yards calico at 10 cts. per yard and sold it for 13 cts. per yard. How much did he gain? Ans. 812.45. 10. The dividend is 37500 and the quotient 75, what is the divisor ? Ans. 500. 11. A boy sold 5 chickens at 25/ a piece ; 8 ducks at 50^ each ; received in payment 3 pigeons at 30^ each, and the balance in money ; how much money did he receive ? Ans. $4.35. 12. The divisor is 37; the quotient 21, and the re- mainder 23, what is the dividend ? Ans. 800. 13. A news boy sold 20 papers at 5/ each, and with the money bought oranges at 4c each, how many oranges did he get? Ans. 25. 14. The first battle of the Revolution was fought April 19, 1775, how many years, months and days have passed since then ? 15. H. Zuberbier has an orange orchard consisting of 480 trees, and each tree produces 5 barrels of oranges which are worth in the market $4 a barrel ; what is the value of his orange crop ? Ans. 81)600. 16. C. Quentell bought a barrel of sirop de batterie containing 43 gallons at 95/ per gallon ; 4 gallons having leaked out he sold the remainder at $1.U5 a gallon. How much did he gain by the transactions? Ans. $.10 gain. 17. W. C. Martin bought ;354 barrels of flour for $2478. He sold the same at $7.50 per barrel ; how mucn did he gain? Ans. $177. 18. The Capital Stock of a Manufactory is $100000 72 Arithmetical Exercises and Examples. which is divided into 200 shares. What are 5 shares worth ? Ans. j!f)00. 19. J. Muller sold to O. Braun 25 barrels of apples at $4 per barrel and 124 barrels of potatoes at $3.25 per bar- rel; he received in payment 1 hogshead of sugar containing 1143 pounds at 8/ and the remainder in money ; how much money did he receive? Ans. $411.5(1. 20. A speculator bought 528 cords of wood at $(J.f>0 per cord. He re-corded the wood so that it measured 57!) cords which he sold at $6.75 a cord ; how much did he gain? Ans. $476.25. CANCELLATION. 75. < ampliation is the proecss of shortening the operations of division, or of the indicated result of multi- plication and division operations combined, by rejecting equal factors from both dividend and divisor or from both increasing and decreasing numbers. The operation is perfoimed by drawing a line across each factor cancelled or cut out. 7G. The Principles of Cancellation, are, 1. lle- jecting or Cancelling a factor from any number is in effect dividing the number by that factor. 2. llejecting or can- celling equal factors from both dividend and divisor, or from both increasing and decreasing numbers in an indicated result, does not change the quotient or result. EXAMPLES. Divide 7x3x4 by 7>(4 Operation by Cancellation. Explanation. In all prob- y 7 lems where we have both niul- ^ 3 triplication and division opera- tions to perform, we use a vertical or perpendicular line ^ which we call the statement 3 Ans. line. This line is used to facil- itate the work by separating the dividends and divisors, or the increasing and decreasing numbers. The dividends or increas- ing numbers are always placed upon the right hand side of the Cancellation. 7B line and the divisors or decreasing numbers are always placed ui)on the left hand side. In this example having written the numbers that constitute the dividend and divisor, respectively upon the right and left hand side of the statement line, we cut out or cancel the equal factors T's and 4's in the numbers constituting the dividend and divisor and thus obtain 3 the answer to the problem. To perform the work without the aid of Cancellation we would be obliged to make the following figures: ly^'^='2l, which X4:r=84 the dividend ; then 7X 4 2 8 the divisor ; then 28)84(3 Ans. 84' 2. Multiply 25, 48 and 88 together and divide the pro- duct by the product of 10, 30 and 8. Operation by Cancellation. AV y /,W/ >/<>//. In this exam- ' lO'^o 5 P^ e we wr * te ^ ie numbers on ~ " .) . , <) the line as above directed and then cancel the lo, and 2:. by Kpp 11 f> ; then the 3G and 48 by 12 ; then the 8 and 88 by 8 ; then 110 the 4 and 2 by 2. This is all __ that can be cancelled and we ., .., * then multiply together the 50-j Alls. 5 ^ ., . uul j l an j jjyide tne pry 8 Operation by Cancellation. E, p hniti<,n. Having writ- - 4 ten the numbers on the state- -"> merit line, we first cancel the 3 ( ,) | j^; 8 and 32 by 8 ; then the 9 and 3 by 3 ; then the 1G and 4 by __ -) _ i A '*' ^ W llav " 1 S no more num- i -2 A ns - bers on the increasing side of the line to cancel we multiply together the remaining numbers on the decreasing side of the line and thus produce the correct result ,\,. In all cases where, after cancelling, no factor appears on either 71 Arithmetical Exercises and Examples. side of the statement line, the factor 1, is always understood, as being there. Its non-appearance is in consequence of not having written it when we cancelled a number by itself. 4. A merchant sold 25 boxes of candles containing 3G pounds each at lt>c' per pound and received in payment starch at (> cents per pound. How many boxes each con- taining !><) pounds did he receive? Ans. 80 boxes. Operation by Cancellation tin; p w > r, 80 boxes Ans. Cancel and work the following line statements or results: 12 i:> 2<; .;: ISM y . ! rx; 784 in 4 51 124 17 10 20 70 76 91 140 25 II Ans. 70 Ans. f Ans. 1921 Ans. 5. Divide the product of 6, 7, 12 and 22 by the pro- duct of 11, 3, 14 and 8. , Ans. 3. (). What is the quotient of 28x66x7XT8-5-56Xl30 X42X13? Ans. J. 7. Multiply 21, 55 and 128 together and divide the product by 14X25X64. Ans. 6f. 8. How many bushels of corn at 70^ each will pay for 140 gallons molasses at (55 cents a gallon ? Ans. 130 bushels. 9. Bought 420 pounds of sugar at 6 cents a pound and gave in payment 360 pounds of rice. What was the price of the riee ? Ans. 7 cents. 10. Sold a drayman 64 bushels of oats at 75 cents a bushel, for which he is to pay in drayage at 50 cents a load. How many loads must he haul ? Ans. 96 loads. 11. How many pounds of butter at 35/ per pound will Properties of Numbers. 75 pay for 245 pounds of rice at 5 cents per pound ? . Ans. 35 pounds. 12. Paid 65/ for 5 yards of calico, what will 27 yards cost at the same rate ? Analytic Solution by Can- Explanation. In all practical cellation. problems of this kind we give a |$j3 13 reason for each step of the opera- tion, and make the whole state- ment to indicate the final result _ ^ without performing any of the $0.51 Ans. intermediate work. In this prob- lem, we place the 6- r >? on the increasing side of the statement line as our premise and reason thus: since 5 yards cost . A Composite number is one that can be divided without a remainder, by some other whole number than itself and 1 ; as 4, 0, 12, 15, 24, etc. All composite numbers are the product of two jjr more other numbers. Numbers are prime to each other when they have no common factor that will divide each without a remainder; as 0, 13, 20, etc. 76 Arithmetical Exercises and Examples. SO. An Kveil number is one that can be divided by 2. without a remainder; as 4, 8, 12, 50, etc. 81. All 0(1(1 number is one that cannot be divided by 2, without a remainder, as 1,7, l'.. l.">. l.'J.'J. etc. 82. A Factor of a Number is a number that will divide it without a remainder or by being taken an entire number of times, will produce it ; as 4 is a factor of 1(>, and 5 a factor of 2.">. .Kvery factor of a number is a divisor of it. 83. A Prime Factor of a number is a prime number that will divide it without a remainder : thus, 1. 2. 3 and 5 are the prime factors of .'Jo. 84. A Composite Factor of a number is a composite number that will divide it without a remainder ; thus, (j and 8 are composite factors of IS 85. An Aliquot part of a number is such a part a> will divide it without a remainder; thus, 1, 2, 3, 4, (\ and 8 are aliquot parts of 2 I. 86. TllO Reciprocal of a number is the quotient of 1 divided by the number ; thus the reciprocal of 8 is 1 8=|- ; and the reciprocal of \ is 1 -=- ^ = 4. 87. The Power of a number is the product obtained by multiplying the number by itself a certain number of times ; thus, 36 is the second power of ; 125 is the third power of 5. 88. The Multiple of a number is the product obtained by multiplying the number by any other number any num- ber of times. Or it is a number divisible by a given num- ber without a remainder ; thus, 14 is a multiple of 7 and 2. and 54 is a multiple of 2, 3, !>, and 27. 89. A Common Multiple of two or more numbers is a number divisible by each of them without a remainder ; thus, 24 is a common multiple of 2, 3, 4, 6 and 12. 00, The Least Common Multiple of two or more Divisibility of Numbers. 77 numbers is the least number that is divisible by each of them without a remainder; thus, 12 is the least common multiple of 2, 3, 4, 6 and 12. DIVISIBILITY OF NUMBERS. 91. A Divisor, or measure of a number, is any num- ber that will divide it without a remainder ; thus, 4 is a divisor or measure of 12, and 5 is a divisor or measure of 20. Cue number is said to be Divisible by another when the remainder is 0. 92. A Common Divisor of two or more numbers is a number that will divide each of them without a remain- der; thus, 2 is a common divisor of 12, 18 and 24. 93. The Greatest Common Divisor of two or more numbers is the greatest number that will divide each of them without a remainder ; thus, 6 is the greatest common divisor of 12, 18 and 24. 94. Every number ending with 0, 2, 4, 6 or 8, is divi- sible by 2. 95. Every number is divisible by 4 when its units and tens figures are divisible by 4 ; thus, 15(3, 264, 34312, 561308, are each divisible by 4. 96. Every number is divisible by 8 when the units, tens and hundreds figures are divisible by 8 ; thus 3824, 12512, 190720 are each divisible by 8. 97. All numbers ending in or 5 are divisible by 5 ; thus, 10, 15 and 35 are divisible by 5. 98. Every number, the sum of whose figures is divi- sible by 3 or 9 without a remainder, is divisible by 3 or 9 ; thus, 135, 3456, 12345912, etc., are each divisible by 3 and by 9. 99. Every even number, the sum of whose figures is a* 78 Arithmetical Exercises and Examples. divisible by 3 without a remainder, is divisible by (\ ; thus 318, 12414, etc., are divisible by (5. Fiucnoxs. KM). A Fraction is one or more of the equal parts of a unit of any kind, or of a collection of units taken tn^-eth'-r. Or more briefly, a part of anything, or a numerical expres- sion of a part of a unit. 101. A Fractional Tnit is one of the equal pans into which any integral unit is divided. If the i,it- t irral unit is divided into two equal pans, each is called n //////'. it into three, each is called a thinl ; if into four. ea-h is called a /'nurtli ; and so on according to the number f parts into which the integral unit is divided. 102. Fractions are divided into two kinds. ( 1 n-iin nnmin- //ix, ) J (,-rrn- r/V////x,) and } ^ (thirteen sevciitrrnthx) are fractions, the denominators of which are, respectively, 2, 4, 6, 8, and 17. The Numerator and Denominator together, are called the terms of the fraction. The Denominator of a fraction shows the number of equal parts into which the unit is divided. Thus in the fraction | the 8 is the denominator and shows that the unit is divided into 8 equal parts called eighths. The Numerator of a fraction shows the number of equal parts taken to form the fraction. Thus in |-, the numerator is 5 and shows that 5 of the 8 equal parts are taken or expressed by the fraction. All fractions aritie from division and are expressions of unexecuted division in which the numerator is the dividend, the denominator the divisor, and the fraction itself the Fractions. 79 Decimal Fractions are those in which the denominators are not generally expressed, but are always 10, or a power of ten; thus, .5, .75, .821, read respectively Jive tenths, seventy-five hundredth*, and eight hundred and twenty-one thousandths, are decimal fractions. To write these fractions as common fractions, they would be written thus, y 5 ^, T 7 5 % ' The point (.) placed before the 5, 7 and 8, in the above decimally expressed fractions, is called the decimal point, and is used to abbreviate the work. 103. CLASSIFICATION OF FRACTIONS. For convenience fractions are classed under the following heads : Proper Fractions ; Improper Fractions ; Simple Fractions; Mixed Numbers; Compound Fractions ; Com- plex Fractions. 104. A Proper Fraction is one in which the nume- rator is less than the denominator, as i, f , J. 105. An Improper Fraction, is one in which the numerator is equal to or greater than the denominator ; as ' and V'. 10l>. A Simple Fraction is one in which both terms are whole numbers, and may be either a proper or hnpn^n r fraction ; as f , f , fj- or 107. A Mixed Number, is a number composed of a whole number and a fraction ; as 2], 5:] and -IfV 103. A Compound Fraction is a fractional part of a fraction or mixed number ; as -J of | and 2 of r 7 ^ of 1'J:]. 109. A Complex Fraction is one that has one or more of its terms fractional ; as : * i 61 3 i 6} - of r and - of of I 5| II 8 UO, The Reciprocal of a Fractlqn is the result yf ^ Arithmetical Exercises and Examples. 1 divided by the fraction. Thus the reciprocal of -H=*=u. 111. The Value of a Fraction is the result of its numerator divided by its denominator. Thus J--1. 2 . 112. <;KNKRAL PRINCIPLES OF FRACTIONS. 1. Multiplying the numerator, or di rid ing the denom- inator, multiplies the fraction. '1. Dividing the numerator, or multiplying the denmn- inator, divides the fraction. 3. Multiplying or dlrldlny both numerator and denom- inator by tlie sumo number does not change the value of the fraction. 113 .REDUCTION OF FRACTIONS. Reduction Of Fractions is the process of changing theiryorw without altering their c fourths? ; 1 :! " thirds? 4 I! sixths? ^ 1 ; | " eiuliths? ] ;;i u c< fourths'/ \ > : cc tc JO / / f i sixteenths? '/ 1.1 ? *=? r ; 1 B 122. What is the value of the following fractional ex- pressions ? if of of *=? .1 of I of J=? .'> of J=? i of i=? ft of i=? ff= !i of J=? 123. What is the reciprocal of 1, of 2, of 3, of i, of :] of 1^? What is the value of f, of \ 2 , of *> of V of V ? Analyse the fraction J. Analysis: \ is a proper fraction, since the numerator is less than the denominator; 4 is the denominator, and shows that the unit is divided into 4 equal parts ; | is the fractional un.t, since it is ONE of the four equal parts into which the unit is di- vided ; H is the numerator and shows that three of these equal parts are taken ; 3 and 4 are the terms of the fraction, and its value is less than 1, or unity. Reduction of Fractions. In like manner analyse the following fractions : | 5 | j J 12^ ^5 ? | ? 4^ |4 124. Mentally add the following fractions : f + * + *+=? f+l=? i+t=? 125. Answer by mental work the following numerical questions : n 11 9 ,*=? 126. ORAL EXERCISES. 1. What will 2} yards cost at $J per yard ? Ans. SI ,x. Analytic solution. Since 1 yard cost SJ, J a yard will cost J as much, which is $; ; and ] yards (2j yards reduced to halves) will cost 5 times as much, which is $ 1 S " or $U- 2. AYluit will 2} pounds cost at 7-]/ per pound ? Analytic solution. Since 1 pound cost - 1 ./' cents, J of a pound will' cost } part which is y cents ; and Y will cost 11 tiiu^s ' s "' cents, which is i|j- 5 - cents or 20 J- cents. In like manner solve the following problems. 3. At $3 a yard what will 5J yards cost? Ans. t2& 4. A dozen is worth $3o, what are 4^ dozen worth? Ans. $15i-. 5. What is the value of 61 dozen apples at 1 per dozen ? Ans. $'2\\. (i. What cost 82 gross at $2J per gross? Aiis. S2.-J . 1. If ;| of a pound cost 12 cents, what is 1 pound worth ? Ans. 16 cents. S4 Arithmetical Exercises and Examples. Analytic solution. Since J of a pound cost 12 cents, J will cost \ of 12 cents, which is 4 cents, and j or 1 pound will cost 4 times 4 cents, which is 16 cents. 2. f of a dozen cost $10, \Uiat is the value of 2j dozen? Ans. $371. Analytic solution. Since J of a dozen cost $10, J of a dozen will cost J as much, which is $5, and jj or a whole dozen will costs times as much, which is $15; and since 1 dozen cost $1:"), j dozen will cost as much, which is $7J and } dozen will cost 5 times as much which is $37J. In like manner solve the following problems : 3. If | of a yard cost $2], what will 1 yard cost ? Ans. $0. 4. If | of a yard cost $2, what will \ of a yard c Ans. 8} 5. 4 of a number is 15, what is the number? Ans. 20. 6. If s of a number is 8, what is 13 times the number ? Ans. LM. 7. If % of a dozen cost $8, what will of a dozen cost at the same rate ? Ans. $9. 8. What part of 4 is 3 ? Ans. J. Analytic solution. Here by the terms of the question we have 3 to divide or measure by 4, and by the exercise of our reason we proceed thus : since 3 is equal to 1, 3 times, it is equal to 4 J of 3 times, which is J. Or thus. Since 1 is J of 4, 3 is 3 times J, which is J. 9. What part of 5 is 5 ? Ans. T ^. Analytic solution. Since $ is equal to 1, ij of a time, it is equal to 5 the i part of f of a time, which is f$. 10. What part of | is 7 ? Ans. 8}. Analytic solution. Since 7 is equal to one 7 times, it is equal to 1, 5 times 7 which is 35, and to 4 instead af i to \ part of 35, which is 8J. What part of f is f ? Ans. 1 1 f Analytic solution. Since | is equal to 1, $ of a time, it is equal to J 8 times f which is 4 g , and to f instead of J, to J part of \, which is | J or IJf. Reduction of Fractions. 85 12. What part of $ is 4? Ans. ff 13. What part of 3 J is 2 H Ans. T 9 . 14. What part of 5 is J of 2 ? Ans. T V 15. What part of 4 is f of f ? Ans. ^%. 16. 9 is i of what number? Ans. 72. Analytic solution. Since 9 is ^ of a number, | or the whole number is 8 times 9 or 72. 17. 13 is \ of what number? Ans. 91. 18. 21 T \ is | of what number ? Ans. 106J. 19. ^ is -}- of what number? Ans. f. 20. 24 is of how many times 3 ? Ans. 10. Analytic solution. Since 24 is i of the number, ^ is J part of 24 which is 6, and |- or the whole number is 5 times 6, which is 30 ; and as 30 is equal to 3, 10 times, therefore '?4 is $ of 10 times 3. 21. 32 is \ of how many times 8 ? Ans. 7. 22. 28 is T 7 ^ of how many times 12 ? Ans. 5. 23. \ of 48 is % of what number ? Ans. 54. Analytic solution. Since 48 is the whole of a number, J of the number is \ part of 48, which is 1 2, and f is 3 times 12, which is 30 ; and since 36 is jj of an unknown number, J of it is J of .'56, which is 18, and | or the whole number is 3 times 18, which is 54. 24. | of 63 is T 4 r of what number? Ans. 154. 25. 8 of % of 64 is^of what number? Ans. 104. 26. i of ^ of 42 is J- of what number ? Ans. 7. 27. J of 32 is f of 4 times what number? Ans. 9. Analytic solution. Since 32 is the whole of a number, \ of the number is \ part of 32, which is 8, and J is 3 times 8, which is 24 ; and since 24 is of 4 times an unknown number, j of 4 times the number is J of 24, which is 12, and f or the whole of I limes the number is 3 times 12, which is 36 ; and since 36 is 4 times the number, \ of 3, which is 9, is the required number. 2S. I uf 40 is f of 7 times what number? Ans. 6. 25). i df .")() is J ot 6 times what number? Ans. 12. 30. f| of { of t>6 is 3| of 3 times what number? Aus. 3. 86 Arithmetical Exercises and Examples. 31. What is the i and \ of a J, of of 15 ? Ans. 5. 127. GREATEST COMMON DIVISOR. For a definition of a divisor, a common divisor, and the greatest common divisor, see page 77. 1. What is the greatest common divisor of 42, 56 and 210? OPERATION. Rjcp!(in. S. 21 l emg O f t hj s kj n< i we fi r!;t arrange the numbers on a '2) 5 3 4 -1 14 horizontal line, and then di- ___ vide by the */nnl/<'itt prime ., , >; %> _ number that will divide two 1 f> - -' * or more without a remainder and write the quotient and 7 i ."> 1 '2 7 7 undivided numbers in a line ___ below ; this process of divid- - j .;, i ing we continue until there are no two numbers that can be divided by the same num- 2X2X3X7X^X2=840 ADS. her without a remainder; then we multiply the divi- sors and the numbers in the last line together, and the product is the least common multiple. When there is any number that will divide any of the others without a remainder it may be cancelled before commencing to divide. 2. What is the least common multiple of 4, 9, 12, 15, and 24 ? Ans. -JGO. What is the least common multiple of the following: 3. Of 8, 4. Hand HO? Aus. 360. 4. Of 50. 27, 3, 45 and 63 ? Ans. 9450. :>. Of 21, 36, 11 and 22? Ans. 2772. (>. Of 800, 600, 10, 40 and 12? Ans. 2400. 7. Of 8, 18, 20 and 70 ? Ans- 2520. 8. A drayman has 2 drays and 2 floats ; on 1 dray he- can haul 9 barrels of flour, and on the oth T 12 barrels: on 1 float he can haul 18 barrels, and on the other 21 bar- rels ; what is the least number of barrels that will make full loads for either of th ; drays or floats. Ans. 252. Reduction of Fractions. 89 9. A fruit dealer desires to invest an equal amount of money in oranges, peaches and grapes, and to expend as small a sum as possible ; the price of oranges is $2.40 per box ; peaches $1.60, and grapes for a medium article, 90 ^., and for first quality, $1.20 ; of these two qualities the fruit dealer took the cheaper. How much more money did he invest than he would had he taken the grapes at $1.20 per box ? Ans. $28.80. WRITTEN EXERCISES. REDUCTION OF FRACTIONS. 129. To rc(ln/c fraction. The object of reducing fractions to their lowest terms is to enable us to more easily and readily understand their value. Reduce the following fractions to their lowest terms : - if- ii-ff-ff Ans. J,f, J.ffr. a - H*. Hi itt- An - A, t, 90 Arithmetical Exercises and Examples. 130. To reduce whole or inir,*>r$ to improper fractions. 1. Reduce 5ii to an improper fraction or to tkml*. OPERATION. Explanation. In all problems of this 5jj kind we reason thus: Since there are 3 thirds in every unit or whole num- ber, in 5 units there are 5 times as JT Ans. many, which is 15 -(- the $ make l s 7 -. 2. Reduce 9 to a fraction whose denominator is 6. OPERATION. 3=z:- 5 /- Ans. 1U. Reduce the following numerical expressions to Im- proper fractions. 3. 8J Ans. " 8 71} Ans. J-f 3 - 4. 161 Ans. 9. 68$ Ans. 479 5. 17} Ans. 10. 2183? Ans. 8.J3_5 6. 32| An-. J -fi. 11. ^i Ans. w- 7. 4354 Ans. & 12. Ans. 1 13. Reduce 14 to a fraction whose denominator is 9. 14. u 37 " u u u a 24. 15. 11 54} " u " u u 10. 132. To redu e improper fractions to whole or mixed numbers. Reduce -^ to a mixed number. OPERATION. Explanation. In all problems of this 17 ..^.i Ans kind we reason thus. Since there are * 4 fourths in 1 unit or whole number, in 11 fourths there areas many units as 17 17-i-4 -4ff Ans. j s e q ua i to 4, which is 4 times with 1 remainder, or altogether 4} as the proper quotient or answer. Reduction of Fractions. 91 Reduce the following improper fractions to whole or mixed numbers. Ans. 4. 6. % 9 - Ans. 3f. Ans. 5|. 7. f g Ans. 5 T V Ans. 48. 8. ^ 8 T 3 - Ans. 9 Ans. 18}. 9. *WP- Ans. 133. To reduce Compound Fractions to Simph' Frac- tions. Reduce \ of f of J to a simple fraction. OPERATION Explanation. In all problems of i v 3 v _ 21 A < this kind we multiply together all X-j-Xa -g-Q Ans. the nuniera tors for a new nume- rator and all the denominator for a new denominator. When a compound fraction contains whole or mixed numbers they must first be reduced to improper fractions. When there are common factors in both terms of a compound fraction they should be cancelled before multiplying. By this cancelling the common factors the work is shortened, and the result unchanged for the reason that dividing both terms, of a fraction by the same number does not alter its value. 2. Reduce of | of f to a simple fraction. OPERATION. $ ? S 5 5 -X-X-= Ans. 4 8 16 2 3. Reduce | of 71 of | of 4 of ^ to a simple frac- tion. OPERATION. -X X-X-X =- Ans. 9 p . i . # a 9 3 4. Reduc'j the following compound iractions to simple ones. Arithmetical Exercises and Examples. 5. of j| of f^. Ans. 6. i of of T ^-. Ans. 7. | of 3J of J. Ans. 1 8. i of Ans. 2^, i. & *' '"'' Ans. 54 in. ii of ff of 17 J. Ans. 6. 11. iXiXfV- Ans. 12. 5X^XA- Ans. KM. To red nee fraction* of different denominator* to equivalent fraction* of a common denominator or of ?/!< least cummnn denominator. 1 >"> Definitions and Principles, pertaining to this kind of reduction of fra -lions. KM. A Common Denominator is a denominator common to two or more fractions. l >T. The Least Common Denominator of two or more fractions is the least denominator to which all the fractions can be reduced. i:K A Common Denominator of two or more fractions is a common multiple of their denominators-, and the Least Counmm /)< nominator of two or more fractions is the least common multiple of their denominators, for the reason that all higher terms of a fraction are multiples of its corresponding lower or lowest terms. 1. Reduce J, J, and -J, to equivalent fractions having a common denominator. OPERATION. Explanation.-^^} 35 it -$1 problems of this kind 3X4X8= 96 common denominator we obtain the common $ of ) =32 hence fjL equivalent of J denominator by mul- J of -91 -_-^72 hence , equivalent off- "plying together the ,, i i . * denominators of all -I of ) =84 hence |f, equivalent of $ lhe fractions Then to find the respective numerators we take such a part of the Reduction of Fractions. 93 common denominator as the respective fractic ns are parts of a unit, as shown in the operation. Reduce the following fractions to equivalent fractions, having a common denominator. 2. "f |, and f Ans. r <&, tffr, and 3. A *, and tV An s. Ml, *, and 4. ,,, and ff Ans. ||f , and ff 5. J, A, A. H. and f Ans. iHH. ?W&> MM!, ftti* and 6. T^, i, 5, and 34. Ans. T % 24=18 hence |~f is the equivalent ol ,. A of J -~21 hi'iKT r! j is the equivalent of i. Explanation. In all problems of this kind we first find the least Common Mn/t>ji/c of the denominators of all the fractions as explained in article 128 page 88 which is the h.ast com- mon denominator. Then, having the least common denomin- ator to find the respective numerators we take such a part of tht' least common denominator as the respective fractions are parts of a unit, as shown in the operation. Reduce the following fractions to equivalent fractions having a least common denominator. 8. *, |and f D. ^,. 1 and /',.. 10. ^. Uand 11. A-i;^ H"i* 12. :, . 18. Jf 94 Arithmetical Exercises and Examples. 14. a.], :(, Ji and ;>. Ans. ff, ^ -^ and if 15. T 8 r r , 3, \ and ||. A'ns. If, 5328, yWff and 1665. DENOMINATE FRACTIONS. I3t. A Denominate Fraction is one whose unit is denominate. Thus J of a yard is a denominate fraction. 140. To reduce " niin frnn from a greater unit tn n A.s-y. 1. Reduce j { a yard to inches. OPERATION. I-.r^annUnn.lu all problems of this kind we multiply the fraction 3 by the units of the scale to which ; ;; it belongs until we reach the unit ^ required. In this example we multiply the 2< inches. Ans. ; ;. v;ir ,j hy > to re( i u ce it to feet, then by 12 to reduce it to inches, the unit required. 2. In I of a ton hw many ounces? Ans. 2SIMK). 141. To reduce (t denominate fraction from a /r.sx unit to a yrrutt r. 1. Reduce I of a pound to a fraction of a ton. OPERATION. Kxpl 4 the units of the scale to which it be- lon^s until we reach the unit requir- ed. Tn this example we divide the f pound by 25 to reduce it to quarters ; then by 4 to reduce it to hundred- TWfr ton ^ ns - weights ; and then by 20 to reduce it to tons, the unit required. 2. Reduce of a penny to a fraction of a pound ster- ling, Ans. jrfa. ADDITION OF FRACTIONS. 142. Addition of fractions is the process of adding two or more fractional numbers of the same kind, or of the same denomination. Addition of Fractions. 95 (1.) Add Jf.f |f and J together. OPERATION. ;2 3 4- & 7 p p p Whole numbers 1 1 1 1 Explanation. In this example there are no two frac- tions alike, hence they cannot be ad- ded until we shall Fractions ob- have reduced them to tained in a ddino- fractions of the same kind. To facilitate and simplify g the operation, we here re- ji fi p p JLJ duce and add but two fractions at a time, and we first select such two as may be the most easily reduced and added. Ac- cordingly, by inspection, we select the J and } as the fractions to first reduce and add; and by the exercise of our reason we see that \ is equal to f which, added to the J, make J, which, for the reason that | make 1 is equal to 1 and J. We set the 1 in the column of whole numbers, and the J in the column of fractions. We then cancel the and J, and select the 3 and J as the next two frac- tions to reduce and add. Again, we see, reasoning analytically, that J is equal to and f are equal to J, which, added to the f, make |, which is equal to 1 and , which, reduced, equals J. The 1 we set in the column of whole numbers, and the J in the column of fractions, and cancel the 3 and ;]. We next add the \ and , and by our reason we see that J is equal to |, which, added to the , make J, which we set in the column of fractions, and then cancel the J arid . We then select the J and | as the next two fractions to add, and reducing tha J to 8ths, we see by our reason that is equal to f and } are equal to 3 times as many, which is f, which added to the | make ^ 3 which is equal to 1 and ; we set the 1 in the column of whole numbers and the f in the column of fractions, and cancel the J and | We then proceed to reduce and add the t\vo remaining fractions $ and . I>y inspection, the exercise of our reasoning faculties, and the use ot our knowledge of the principles of numbers as contained in the preceding \vork, we see that the i and f are not only not alike, but that we can neither reduce the 1 to 8ths nor the to 5ths, and, therefore, before we can add them we must reduce both the and to equivalent fractions of the same kind, or whose denominators are alike. To do this, we first observe that the denominators are not divisible by the same number, greater than 1, and hence the product of ; -'^rn. 4fl 96 Arithmetical Exercises and Examples. is the least number that both of the fractions are reducible to, or, in other words their product 40 is the least common deno- minator of the two fractions. Having this, we next reduce the $ and | to 40ths, and by our reason we see that -J- is equal to 4 8 and | are equal to 4 times as many, which is { ; then that | is equal to fa and are equal to "> times as many, which is !f r w ich added to the Jj- make J, which for the reason that $ make a whole one, is equal to I and .},\. which we place in their respective columns and cancel tin- i and J. The opera- tion c 1 ' adding the fractions is now completed, and by adding the whole numbers and annexing the remaining fractions, we have as the correct result Tht- foregoing problem illustrates the most rational, easy and rapid system of adding fractions known, and as fractions are so indispensable and of so frequent occurrence in practical life, the principles involved in the system should be thoroughly understood. In practical work, we would very much shorten the opera- tion by adding several fractions at once, and mentally perform- ing the most, if not all of the reduction and addition work, without stating the results. Thus, in the above problem, we would add the J, J and J at once. We can instantly sec- that their sum is y or 2J, and without naming or setting the 2J, we add to it mentally the result of 3 and j, whi'.-h we mentally see is | or 1J, making 3f, which are the only figures we set. Thus all tl.e fractions, except and , are added at one mental operation. Then we mentally add the sum of -J and f by the same process of reasoning as given in the illustration of the above example, and obtain the correct result 4JJ. (2.) Add |, % and ^ together. OPERATION. Fractions obtained by adding. Wholn numbers. 4 27 9 ;; 28 288 209 Explanation. By in- spection and reason we see that there are no two fractions alike, and that we cannot reduce either of them to an equivalent denomina- tion of any other; there- fore we select the small est two, f and |, and reduce them to equiva- lent fractions of the same kind, or of the same denominator, which wo find, by multiplying the denom- inators together, to be :*;. 497 ijf Ans. Addition of Fractions. 97 We now find by reasoning as in the preceding example, that J and J are equal respectively to f J, and ff , and collectively to f|, which is equal to 1 and if. Then proceeding as in the first case, we add the T 8 T and j|. (3.) Add J of f of 2i, 1 f and ^ together. OPERATION. Statement >h>wing the reduction of the fractions. 3 1 ^ 3 5 9 -x-x- - % $ 4 8 6 23 Statement showing the result of the. reduction and tl\e iitMt'tioii of fractions. Whole I'nu-lioMs ol.tjiim-d numbers, by ml 20 L' 8 Explanation. Here we have compound fractions and mixed numbers, and before adding, we reduce the mixed numbers to im- proper fractions, and the compound fractions to simple ones. Then we add the J and f, which are equal to 1 and J ; then the | and J, which are equal to || ; then the f J and ^ 3 -, which are equal to 1 and ^I'jj. Then adding the whole numbers, and annexing the fractions, we have 2JJi| as the correct result. EXAMPLES. (4.) Add }, }, f, f I, and ^. (5.) Add ij and Jf (6.) Add J, f, I, and ^. (7.) Add f , |J, || and |f (8.) Add f , ,% H and fj- ~(9~) f of iJ and 21 of 4 of ^ (10.) Add 2J, 6|, 5| and 21. Ans. Ans. 2 Ans. 2 Ans. Sj Ans. jVns. f| Ans. 17 s. Arithmetical Exercises and Examples. (1 i and .jV. nd f. ,/.(;, IS^and 2^. i .-). and in;. and -VJ. i :>." ,327^ and25i, lulu of in sacks wreigl) ;:.[ . 1 i 1571, L52J, 1 Uf, and Kil , ; pounds? Ans, L53SH ll.s. Of .', and 2j Of -\ Of 1. Ans. H. Add 3- of ^ of 'l and n nf A of . Ans. 2||. IIo\v many vards in s l,lts of dmncstic. nieasur- tfi follows: 101,39), i: ii!' , ! ;. and yards? Ans. 328|f. I'D. 14 feags of Coffee weigh as follows: Kii^ 7 ,,. i . 164J, 1654, 164|, 165J, L62J, \M&. 164f, L65|, Hi.") i. 1 (i 1 } /. and 1 ('.") -I pounds: how many pounds in all? Ans. ^:-iOl. V merchant nought ll."):)', pounds of rice for 8i)-l; STl'J pounds of su-ar for s^7^: ."isoji pounds ol' roifee for -Sii");; 'Ji-[(}\ pounds of cheese for ST5-]; and ]ounds : f uraham flour for 8 IS:. What was the total number of pounds, and the total cost of all he pur- chased? Ans. 3254 f pounds, $357-$- cost, ,,,and :-]'J of ^ of 1J. Ans. . Add ; v, 14- and } of 3. Ans. Subtraction of Fractions. 99 SUBTRACTION OF FRACTIONS. 114. Subtraction of fractions is the operation in num- bers of finding the difference between two fractional num- bers that are of the same denomination ; it is hence the converse of addition. (1.) What is the difference between J and f? Ans. ^ OPERATION Explanation Here we see f = 15 Ans. or f 4 that the denominations are ^5 IQ not the same, and there- fore, before we can sub- tract, we must reduce the -0- Ans fractions to a ccmmon de- nominator. By inspection and in accordance with the principles as explained in the first problem of addition, we see that the least common denominator is 20 ; then, that J are equal to ^ and that | are equal to if, and that the difference is 2 ^. (2.) From 28 1- take 71. Ans. 21 1. OPERATION. Explanation In perfonn- 28$ ing: the operation of the 71 question before us, we first observe that the fractions which constitute a part of 21i Ans. the numbers to be sub- stractv-d are not of the Bftme kind or denomination, and hence, before we can peifrrm the work, we must reduce them to equivalent fractions. \Ve next observe that the J may be reduced to Hths, and by the exer- cise of our reason we see that it is equal to |, which taken from -| leaves J; this completes the work with the fractions, and we have but to find the difference between the whole numbers as in simple subtraction. (3.) What is the difference between 371 and 12/j- ? Ans. 24* f, OPERATION. Emanation. By inspec" 72 ) QQ tion we here see that the 37| = 27 j fractions belonging to the J9JL- 56 whole numbers are not ^ of the same denomina and that neither can be ^- n3 ' reduced to an equivalent fraction of the same term 100 Arithmetical Exercises and Examples. as the other, and therefore we must reduce both to equivalent fractions having a common denominator, before we can sub- tract ; and by the exercise of our reason we see that 72 is the smallest number to which both can be reduced, which, for con- venience, we set below the fractions, and by the same reason- ing as given in the preceding examples we see that J are equal and that | are equal to |J, which, for convenience, we carry to the right of the respective tractions, and to economise time we set only the numerators. We now observe that the upper traction, belonging to the greater number, is less than the lower fraction, In-longing to the lesser number. Therefore, before \ve can subtract the fractions, we must add 1, reduced to 72ds, to 2 7 ,. which We now take C' from i! 1 ;! and have a remainder iie fractional part of our answer. We now add 1 to the subtrahend, because we previously added 1 to thi- minuend, making it !.', which we -ubtract from 37 and t remainder ot 'J I. wi. 1 com- plete the operation. 4. What is tin- di n ] \ and i! ? An- .">. What i> tin 1 dit \> (I. What is tlu- difiL-ivinv U-twren .")- and !U ? An 7. What is th<- diffrivn.v bi-t \\von 7 and o^.- ? Ans. 8. What is the diffi n --y and 14? An- What is the diflxTriii-i- li-t\v. en tin 1 following niun' !). : and ;*. Ans. 10. 1-j and f Ans. 11. 'j and , 1'2. ^ and 13. [ian.i 14. ; , 4 , r and , 15. i^|and ! Hi. Hi and ^. 17. A of |- and i of and ;17-. J. .T) | and U^. lid 3-vyl-. iV 75 4 and 4.' Ans Subtraction of Fractions. 101 24. 31J- and 17|. Ans. 13|. 25. From (>l of T 4 +13 take J- of } of 15^-f'of . Ans. 13f|. 2(5. From 8J+6f ^ take J of | of 3 of lf+2 1 ,. Ans. 27. From t7}+f take 6} f. Ans. 12^. 88. . plus (J.j, and (J tiiiHis a dozen minus one dozen and a halt".' Ans. 2 i J. Famll bi 'light (\ chests of tea weighing 3s. 1 r,.:i!)', and 43 i pounds; he sold 120^ pounds ; , n d used 64 pounds. How many pounds has he on hand ? Ans. IL' 34. JY Burba owned the Steamer Lsubel. he sold ;^ ; what is -j of his present interest? Ans. -f^. 3r>. From the .-urn oi i) 1 and S^ take the difference of 14-2^ and Of Ans. 10^. 36. What number is that to wliich if \(\\ be added the sum will be. 44^ ? Ans. 27:. 102 Arithmetical Exercises and Examples. 37. C. E. McNeil bought of of a vessel and sold f of 3 of his share. . How much of the whole vessel has he left? Ans. i. 38. E. Brinkman bought a barrel of molasses containing H I gallons ; lie sold !) \ gallons ; how many gallons remain in the barrel? Ans. 31 J gallons. 'V.>. C. GT. De Russy bought two sacks of coffee weighing respectively 1(11-1 and lii:>:, : pounds. He sold to J. Walter ISO. I pounds; how many has he left? Ans. 138J pounds. 40. A. Buchanan sold to J. Bruns J of of his planta- tion, what part, has he left? Ans. ^. 41. What is the difference between > of J plus 5 and % of J plus J ? Ans. T y 4 .]. -I. Srhonekas and M. Shlenker were each o owner of a broom and brush factory. Schonekas sold J of his interest to E. F. Meyer, and then ] of his remaining inter- est to M. Shlenker who subsequently sold % of f of his whole interest to F. Kranz. What is the present interest of each owner ? Ans. J. J. Slionekas i ; E. F. Meyer } ; M. Shlenker f| and F. Kranz f 43. J. J. Manson owned J of the Steamer Natchez. He sold to G. Lindsey ] interest in the Steamer, and to W. S. Keaghoy .{ of his remaining interest. What is the present interest of each in the boat? Ans. Manson f; Lindsey i and Keaghey J. Multiplication of Fr actions. 103 MULTIPLICATION OF FRACTIONS. 115. Multiplication of fractions is the.proqess of multi- plying when one or both of the factors contain fractional numbers. In the multiplication of simple numbers we saw that the result of multiplication operations was increasing, but in the multiplication of fractions, when the multiplier is less than a unit, the result is decreasing. This is evident from the fact that multiplication is the process of repeating the mul- tiplicand as many times as there are units in the multiplier, and therefore, when the multiplier is less than a unit, the multiplicand will be repeated only a } art of a time, or such a part of itself as the multiplier is p:\rt of a unit. To elucidate the principles of the subject and render clear the reasoning we present our first questions in prac- tical language ; and to aid still farther in comprehending the work, we give the following practical definition of mul- tiplication. 116. MULTIPLICATION is that operation in the prac- tical business computation of numbers of finding the cost of either a part of one, or of many pounds, yards, barrels, etc., when we have the cost of one pound, yard, barrel, etc. On the principle or fact embraced in this definition, we found OUT reasoning for the solution of every question tint can pos- sibly be presented in multiplication, either of simple num- bers or of fractions. Considering the foregoing, we see that in all multiplica- tion questions of a practical nature, we must necessarily reason from one, or unity , to a part of one or many. Thus, if 1 pound cost 50 /, \ of a pound will cost 1th part of it ; and if 1 yard costs $2, 3 yards will cost three times as much, or 3 times $2. In the solution of abstract questions we apply the same system of reasoning without naming the factors, and thereby avoid all of the arbitrary rules given in the Arithmetics of the day v KM- Arithmetical Exercises and Examples. (1.) What will 41| pounds of coflee cost at 21 \f per pound ? Ans. $8.97| OPERATION. j Explanation. In this example by inspection and the exercise of our reason, we see that we have in the 167 solution both increasing and decreas- - ing work to perform, and hence to facilitate the operation of our work, we use a perpendicular or statement line, on the right hand side of -which Ans. we pi ac e all increasing numbers, and on the left hand side all decreasing numbers. But, be it remembered, we never place a number on either side without giving a reason therefor, and in commencing the solution statement of any problem we always place at the top right hand side the mimber representing the article or thing to be increased or decreased, or that which the conditions of the question require the answer to be in. By further inspection and reasoning we see that 21 \f are to be increased 41} times, and hence we will place the same at the top and on the increasingr side of our statement line ; but, before doing so, in order to facilitate the work, we first reduce the 21J to half cents, which equals 4 2 3 cents, the denominator of which we place on the decreasing side and the numerator on the in- creasing side of the statement line. We then reason as follows: since 1 pound cost % 3 cents, J of a pound will cost i part of it, and as this conclusion is a decreasing one, we write the 4 on the decreasing side ; then, since J costs the result of the state- ment thus far made, 1 J 7 , 41f reduced, will cost 167 times as much, which, because the conclusion is an increasing one, we write on the increasing side, and thus complete the reason and statement. It may be asked how we know that if 1 pound costs 4j3^ J of a pound will cost J part of it. and that l J 7 will cost lt>7 times as much. We answer, by the exercise of our reasoning faculties, our common sense, our judgment, which is the only way that mortal man knows anything. In working out the statement, there being no common factors in the increasing and decreasing numbers that can be cancelled, we have but to multiply the increasing numbers together, which produce 7181, and the decreasing numbers together, which pro- duce 8 ; then we divide the 7181 by 8 and obtain $8.97f as the result of the reasoning and operation. In all simple statements the result is always of the same kind or character as represented by the number first placed on the statement lint Multiplication of Fractions. 105 Multiply by f , or to express the problem in practical language : (2.) What will I of a yard cost at -i of a dollar per yard? Ans. $}. OPERATION. Explanation. As explained in the above example, by inspection and rea- son we see that the i of a dollar is the number to be multiplied, and also the number representing the nature of the answer; hence we first place the same , on our statement line, and then reason 2 AnS. ag follows : if, or since, 1 yard costs | of a dollar, J of a yard will cost $ part of it, and f- wih cost 5 times as much as J. The 8 and 5 are placed respectively on the decreasing and increasing sides of the statement line, because the reasoning, when, they were respectively used, was decreasing and increasing. In working out the statement, we first cancel the 5's, and then the H by the 4, and thus obiain J a dollar as the correct result. The reasoning and operation of the foregoing problems vi 1 solve every question that can be presented in multipli- ation of fractions. (3.) What will 58} pounds cost at in*/ per pound? OPERATION. I'.jjHiDKitinn. The reasoning for the tf solution of this problem is the same 25 as that given in the first example: "lit 39 hence we will very much abridge our explanation. We first reduce and \ place on the line the IGj-V ; then having $r.75 Ans. the cost of 1 pound, we. see by our reason that J a pound will cost J as much, and H 7 pounds will cost 117 times as much as J. This completes the statement, and in working the same we first cancel the 50 by 2, then the 117 by the 3. this cancels all of the decreasing figures, and \ve have but to multiply the 25 by 39 and produce the answer, 9.75. 106 Arithmetical Exercises and Examples. (4.) What will 3| dozen cost at $3| per dozen ? OPERATION. 17 51 Ans. F,.cplanation For reasons above giv- en, we reduce and place the $3J on tin- line; then we see that since 1 di-y.-n costs $y, J of a dozen will ; part of it, and ^ will cost 15 times as much. (5.) What will 5J bushels cost at 15J/ per pint? OPK'IATION. l-'l(in5 factors are abstract numbers, hence we 4 T 5 cannot give the same analogical reason- ing as we gave in the foregoing problems where the factors were denominate num- 125 bers ; although were we to do so, the result so far as the figures are concerned, 31} Ans would be correct. We therefore, reduce and place the 8J, the number to be mul- tiplied, on the statement line and reason as follows : Since 1 time - 2 ^ 5 - is equal to - 2 S 5 , J- time the same is J part of *j- ami Y are 15 times as many. MISri-LLANEOUS EXAMPLES IN Mr LTII'LIOATION OF FRACTIONS. 1. What will 1(> yards cost at 14:j^ per yard? Ans. 82.31). '1. What will 23$ pounds cost at 35^ per pound ? Ans. $s.:-ni. 3. What will J of a yard cost at $| per yard? " Ans. ^-|. 4. What will J of a yard cost at $J per yard? - Ans. $}. .">. What w r ill 8^ pounds cost at 7JX per pound? Ans. 63J/. 6. What will 10| pounds cost at 9J^ per pound ? Ans. 99-j^/. 7. What will 19f pounds cost at 18|/ per pound? Ans. $3.60|/- 8. What will 25if yards cost at 17 \ff per yard ? Ans. $4.55^. 9. What will 11 f yards cost at 12J/ per yard? Ans. $ 10. What will 21} yards cost at 16J/ per yard? Ans. $3.58-J. 11. What will 14t pounds cost at 12}^ per pound? 'Ans. $1.74 A, Multiplication of Fractions. 109 12. What will 31 J pounds cost at 11J/ per pound? Ans. S3.46JJ. 13. Multiply %\ by 12. Ans. 5 J. 14. ,. Multiply If by 13. Ans. 10^. 15. Multiply ^ by 19. Ans. 10J-J-. 16. Multiply 7 by f Ans. 2f 17. Multiply 13 by iV Ans - 9 iV 18. Multiply 105 by ^. Ans. 12. 19. Multiply 136 by T 3 ^. Ans. 44-ff 20. Multiply 12 by 31|. Ans. 382. 21. Multiply 25 by 3|. Ans. 85. 22 Multiply 19 by T 3 r . Ans. 5^. 23. Multiply \\ by if. Ans. }}. 24. Multiply || by f Ans. |. 25. ailtiply 11 j by If. Ans. 18f Multiply 2| by 21 J. Ans. 50*. 27. Find the value of f of J of | of f f of 4. Ans. A. 28. Multiply 7^ by f Ans. 6^-. 29. What is the product of T 9 7 , f , f 'and \ ? Ans. ^. 30. What is the product of If, f , 2 and 5 J ? Ans. 31. What is the product of T \ of 2J by of 7J ? Ans. 1H- 32. What is the product of 12} multiplied by 5} times 6|? Ans' 464^. 33. At i of a dollar a pound, what will $ of a pound of tea cost? Ans. T 9 T of a dollar. 34. What will 51 dozen buttons cost at -g% of a dollar per dozen ? Ans. J of a dollar. 35. What will 4} yards cost at 4 J/ per yard ? Ans. 110 Arithmetical Exercises and Eaxmples. 36. What will 9 J yards cost at 9f f per yard ? Ans. 9: 37. What will 12 yards cost at 12 jy per yard? Ans. $1.6C_ 38. What will 12} pounds cost at 12}/ per pound? Ans. $1.56}. 39. What will 6} pounds cost at 6}/ per pound ? Ans. 42 T * 40. What will 8f pounds cost at 8J/ per pound? Ans. 72|/. 41. What will 19| pounds cost at 19f/ per pound? Ans. $3.80. 42. What will 9} pounds cost at ll}/ per pound ? Ans. $1.14^. 43. . What will 15} pounds cost at 10}/ per pound? Ans. $1.62}. 44. What will 40| pounds cost at 22f / per pound ? Ans. 39.19^. 45. What will 2812} gallons cost at $4.50 per gallon ? Ans. $12656.25. 46. What cost 471} gallons at $3f per gallon ? Am $1592^-. 47. Sold 937852} pounds of cotton at 14|f / per pound, what did it amount to ? Ans. $135695.53f|. 48. If a man earns $2} in 1 day how much will he earn in lr>} days? Ans. $41}. 49. A Contractor pays $1 } per day for labor and he has 370 men employed for six days. How much money will it take to pay them ? Ans. $2775. 50. E. J. Denis paid ^j- of a dollar for a book and for paper # of the cost of the book. How much did he pay for paper ? Ans. 60 cents. 51. Distillers of the essence of rose have determined by experience that it requires 48000 pounds of rose leaves to Multiplication of Fractions. Ill make or distill one pound of the ottar of rose. How many pounds of rose leaves will it require to distill 50$ pounds of the ottar of rose ? Aus. 2442000 pounds. 52. If a pound and a half costs a cent and a half what will 25 pounds cost? Ans. 25J cents. 53. F. Querens Jr. owned i| of the Steamer Katie and sold f of his share to G. M. Leahy, what part of the whole Steamer did he sell ? Ans. f . 54. K. E. Terregrossa can work the problems in this book in 4f months, how many months would it take him to work f of them ? Ans. 3^- months. 55. E. Schwartz paid $ for 1 gallon of molasses, what is J of a gallon worth at the same rate? Ans. $|. 56. What will 7? boxes of raisins cost at $2| per box ? Ans. $161. 57. iOn one occasion at the New Orleans Opera 2 of the ladies and gentlemen present were French ; 2 of the re- mainder Ameiican ; J of the remainder German, and the others were of different nationalities. What part were Americans, what part Germans and what part were of differ- ent nationalities ? Ans. J Americans, T X T Germans and J of different nationalities. 68. C. Reynolds owned I of a plantation and sold % of his share to I). C. Williams, who sold \ of what he pur- chased to E. Szymanowski, who sold J of what he pur- chased to N. Forcheimer. What is Forcheimer's share in the plantation ? Ans. -^. 59. J. Byrnes owned of 2000 acres of land and sold f of his share to E. H. Wells, who sold | of what he pur- chased to H. Clark. How many acres have each? Ans. J. Byrnes 400 ; E. H. Wells 450 ; and H. Clark 750 acres. 112 Arithmetical Exercises and Examples. DIVISION OF FRACTIONS. 126. Division of fractions is the process of dividing when the divisor or dividend, or both, contain fractional numbers. In the division of simple numbers we saw that the result of division operations was decreasing, but in the division of fractions, when the divisor is less than a unit, the result is increasing. This iact is plain, for the reason that the operation of division is the process of finding how many times the dividend is equal to the divisor, and, hence, when the divisor is less than 1. the dividend will be equal to the divisor as many times itself as the divisor is part of 1. In practical operations we usually have the thive follow- ing cases or questions in division of fractional numbers. 1st. To find the cost of mu* pound, yard, or trticle of of any kind, when we have the cost of many pounds, yards or articles of any kind given. 2d. VTo/mt/ the cost of one pound, yard or article of any kind, when we have the cost of n jxn-f of a pound, yard or article of any kind given. 3d. To find the number of pounds, yards or articles of any kind that can be bought with a specified sum. when we have the price of one, or apart of one pound, yard or article of any kind given. From these questions we see that division is the converse of multiplication and that from the nature of the question, we must reason from many to one or from apart of one to one. Thus : 1st. if 5 pounds cost 50^, 1 pound will cost the ith part of it ; in the 2d. case, if J of a yard cost $2, J- of a yard will cost the J part of it, and -^ths, or a whole yard, will cost 4 times as much ; and in die third case, if jfjt buy 1 yard, or any other thing, \ft will buy the -^-th part of it, and f , or a whole cent, will buy 2 times as much. For the full reasoning, for this, ease, see the explanation of the 2d problem. Division of Fractions. 113 (1.) Bought 7J pounds of sugar for 78}/. What was the cost per pound ? OPERATION. Explanation. By inspection and ft the exercise of our reasoning facul- 315 21 t * es > we see th*^ as the 78}^ are the cost of 7J poui.ds. it must be divided by 7J in order to obtain the cost of 1 pound. We therefore, Ans. reduce and place the 78} on our statement line. In all division operations, in order to facilitate the work, we thus place the number to be divided. We then reason from mauy to 1, as follows : since -V 5 - pounds, which is 7J reduced to halves, cost -S^p/, one-half a pound will cost the 15th part of it, and 2 halves, or a whole pound, will cost 2 times as much. This completes the reasoning and state- ment. The 15 and 2 are placed respectively on the decreasing' and increasing sides of the line, for the reason that when they were used the conclusion arrived at were respectively decreasing and increasing. {%) At 10 \fl per pound, how many pounds can* be bought for $3.92f? OPERATION. Explanation. By inspection - lb and reason, we see that the ques- 1 tion requires puunds for the A result or answer. Therefore, in -- *o all of the reasoning we must either increase or decrease pounds. To aid in rendering 36i lb Ans. the solution easily understood, we first place the 1 pound that cost lOff on the right of our statement line, and reason as follows: since 4^. which is 10}p reduced, buy 1 pound, of a cent will buy the 4Jd part, and 4 fourths or a whole cent will buy 4 times as much; then, since 1 cent will buy the result of the statement now made, J of a cent will buy J part, and 2-1-^3-p will buy 3139 times as much. This completes the reasoning and statement. The placing of the 1 pound on the statement line may be omitted and the reasoning given in the same manner as when t is thus placed. 114 Arithmetical Exercises and Examples. At $| per yard, how many yards can we buy for ? OPERATION. Y 1 34 Explanation. For reasons given in preceding examples, we first place 1 yard on our line, and then reason as follows: since J of a dol- lar buy 1 yard, \ will buy the 3d part, and J or a whole dollar, 4 times as much: then, sin (ye 1 dollar 6|l-J- yard, Ans. will buy the result of our state- ment. J of a dollar will buy the 8th part, and J, 7 times as much. This completes the reasoning and statement. V-l.) At $l-g- JUT puuml, ho\v many pounds can we buy OI'KKATION. ft A 38 H)0 It) Ans. Having placed 1 pound on our line, we reason thus: >in-:e 7 dollars buy 1 pound, will buy the 7th part, and |, or a whole dollar, f> times as much, and 38 dollars will buy 38 times as much as $1. This completes the reason- ing and state.meut. (5.) At So per dozen, now many dozen can we buy for V i ' Ol'K.r.ATlON. Duz. 1 I 9Q1 , . 484 doz Ans. Explanation. We place 1 dozen, the equivalent of $3, on the line, and reason thus ; if $3 buy 1 dozen, $1 will buy the 3rd part; then, if $1 buys the result of the statement now made, J of a dollar will buy the 8th part, and $ 6 J S will bliy 675 times as manv> Division of Fractions. 115 1 o (6.) Bought 9f yards for $22i. What was the price per yard ? Explanation. For reasons given in the first example of division, we reduce and place the $22J on 4 our line, and then reason thus : if 'f yards cost V dollars, of a yard will cost the 75th part, and | or a whole yard will cost 8 times as much. This completes Ans. the reasoning and statement. In working out the statement, we first cancel the 75 and 45 by 15 ; then the 8 by the 2 ; then we multiply the 3 and 4 together and divide the result by the 5. (7.) Bought f of a pound for 30/. What was the price per pound ? OPERATION. Explanation. Placing the cost on the line, we reason thus ; if f of a %(h 1ft pound cost 30f, will cost the 3d I rr part, and f or a whole pound will cost 4 times as much ; which worked out gives 40f or the cost 40/ Ans. of ! pound. (8.) Bought 5 boxes of indse. for SSI J. What was the price per box ? OPERATION. Ans. 65 Explanation 1 lie ^81| being the number to be divided, we reduce and place the same on the line ; then reason thus : if 5 boxes cost 3 J 5 dollars, 1 box will cost the 5th EXAMPLES. (9.) Bought 18| pounds for 37}/. What was the price per pound ? Ans. 2^. 10. At 6i/ per pound, how many pounds can be bought for 96IX ? Ans. 15ff 11. Bought 250J dozen for $1251f What was the price per dozen ? Ans. $4.99ff . 116 Arithmetical Exercises and Examples. 11 12. At 79-j$r/ per pound, how many pounds can bo bought for 7287}/ ? Ans. 91|-J2|. 13. At $i a piece, how many chickens can be bought for $25J ? Ans. 51. 127. DIVISION OP ABSTRACT NUMBERS. (1.) Divide 22} by 5}. jo] Explanation. The real question to be determined in this example is, how many times is 22J equal to 5J, and as both the dividend and 22 divisor are abstract numbers, we cannot, therefore, logically reason ~ . as in the preceding problems, and , - ^ ns - accordingly proceed as follows: the 22J being the number to be divided, we first reduce and place the same on our statement line; then by inspection and the exercise of our reason, we see ihat 22J is equal to 1, 22f times, or reduced that -^ are equal to 1, ^- times ; and if equal to I, -M- times, it is equal to ^, twice as many times, and to ty instead of J, the T J T part. This completes the reasoning and statement of the problem, and the same character of reasoning and statement will solve all division problems in abstract numbers. (2.) Divide T ^ by i. OPERATION. Explanation. In this example 15 3 2 the dividend being less than the 4 divisor, the question is, what part of a time is the -f 5 equal to J. Placing the on the line, we fea- Ans. son, as in the above example, thus: o are equal icTl, ^ of a time ; and if equal to 1, -fa times, it iV equal to J, 4 times as many times, and to } instead of J, the 3d part. Division of Fractions. 117 (3.) Divide 3 by } . OPERATION. ;; Explanation. We first place the *; j 3 on the line, and reason thus : 3 is equal to 1, 3 times, and to J instead of 1, 3 times as many times ; and to -f instead of , the J part. Ans. i 1.) Divide 14f by 9. OPERATION. Explanation. Placing the num- ber to be divided on the line, we reason thus : ^- are equal to 1, - 7 ^ 2 - times, and to 9 instead of 1, the 9th part. Ans. 8 The solution of the 4 preceding problems elucidates the only correct reasoning for dividing abstract fractional num- bers. But for practical work we would not advise a change from the reasoning given where the numbers are (^nomi- nate. MISCELLANEOUS EXAMPLES IX DIVISION OF FRAC- TIONS. 1. Bought 4 yards for 143, what was the cost per yard? Ans. $3f. 2. Sold 8J. pounds for $1.87, what was the price per pound ? Ans. 22 cents. 3. Paid 37J cents for 6} yards of calico, what was the price per yard ? Ans. 6 cents. 4. At $1| per gallon, how many gallons can be bought for $148.1 ? Ans. 108 gallons. 5. Divide ^ by 2. Ans. f. 6. Divide ^ 9 T by 3. Ans. f 7. Divide |f by 5. Ans. ||. 8. Divide ^ by 5. Ans. -^-. 9. Divide 7i by 9. Ans. 10. Divide 2 by f Ans. 2J. 118 Arithmetical Exercises and Examples. 11. Divide 3 by J T . Ans. 7. 12. Divide 5 by jf Ans. 5 A. 13. Divide 21 by ^-. Ans. 33. 14. Divide 105 by jf Ans. 119. 15. Divide fj- by ? 5 5 , Ans. 4. 16. Divide ft by . Ans. 12. 17. Divide 2i by jj. Ans. 3. PT87J Divide ff by T 4 T . Ans. TOT Divide -5A by 21. Ans. 20. Divide $ of |f by f Ans. 21. If one pound of tea cost of a dollar, how many pounds can be bought for $25 ? Ans. 30 Ibs. 22. Six barrel* of flour were divided among some poor families in such a manner that each received f of a barrel; how many families were there? Ans. 9. 23. If a boy can earn T 7 T of a dollar in one day ; how many days will it take him to earn 21 ? Ans. 33 days. 24. Henry walked 25 miles, which was | of the dis- tance Robert walked ; how many miles did Kobert walk ? Ans. 30 miles. 25. At the battle of Germantown the British lost about 600 men ; this was f of the number lost by the Ameri- cans ; and the number lost by the Americans was f of the number they received as re-enforcements just before the battle. How many men did the Americans lose, and how many receive as re-enforcements ? Ans. 1000 men lost, 2500 re-enforcements. 26. A man had his store insured for $9000, which was f of T 9 T of its value ; what was the store worth ? Ans. $12375. 27. Sulphur will fuse at 232 Fahrenheit. This is 7} times the temperature required to melt ice. At what temperature will ice melt ? 4ns. 32. 28. A quantity of mercury weighed 32062J Ibs., which is 13i times the weight of an equal bulk of water. What would an equal bulk of water weigh ? Ans. 2375 ft>s. 29. A pound of water at 212 F. was mixed with a Division of Fractions. 119 pound of powdered ice at 32. The united temperature of the two was 4 T 9 g times the temperature of the mixture when the ice became melted. What was the temperature of the two pounds after the ice became melted ? Ans. 52. 30. lx ^VVhen the air was at the freezing point, a cannon 27(>KJ-S feet distant from New Orleans was discharged. 25 J 'seconds elapsed after the discharge before the sound Breached New Orleans. How many feet per second did the sound travel ? Ans. 1090 feet. 31. Divido 2S7] by 5. Ans. 57 Operation without the Kjplanution. We first divide line statement. ^ 28T b 7 th P rocess of short r .,,0^3 division and obtain a quotient of 57 and a remainder of 2 ; this remainder we reduce to a fraction 57^-Q- Ans. whose denominator is the same as that of the fraction to be divided, add it to this fraction and then divide the sum by 5 and annex the result to the quotient 57. Thus 2=|-f J=*fS and ^-5-6=4$. 32. Divide 1471 -,*. by !. Ans. 163 T ^. 33. Divide 1044$ by 12\ Ans. 87 T V 34. E. T. Churchill divided 14 T 7 ^ dozen apples among 3 boys and 2 girls ; he gave each girl twice as many as each boy. How many did each boy and each girl receive ? Ans. 2 r ^ doz. each boy, 4i doz. each girl. 35. Divide 1 by \. Ans. 5. 36. Divide \ by 1. Ans. \. 8J A- DJ i 37. Divide of by of - Ans. f 6J H 4$ * 38. If 4J pounds of coffee cost 90 cents, what will 22 if pounds cost? Ans. $4.55. 39. R. E. L. Fleming owns 1 of the capital stock of a factory valued at $24000; he gives \ of i to educational societies, and the remainder he divides equally between his 120 Arithmetical Exercises and Examples. four children. How much does he give to educational societies and how much does each child receive ? Ans. $1500 to educational societies. $1875 each child receives. 40. C. Craft has 65} yards of cloth, 2 yards wide, how many yards of lining if of a yard wide will be required to line it? Ans. 196} yards. 41. Divide IS oranges between A. and B. so that A. wtllhave i more than B. What number will each have ? Ans. A. 10 ; B. 8. 42. Divide 18 oranges between A. and B. so that A. will have } less than B. What number will each have ? Ans. A. 7f ; B. lOf 43. A.. B. and C. are to receive $26 in proportion to ,}, } and J. What will each receive ? Ans. A. $12 ; B. $8 ; C. $ii. 44. A. and B. can do a piece of work in 10 days ; A. alone can do it in 15 days. How many days will it take B. to do it ? Ans. 30 days. 45. A. and B. can do a piece of work in 14 days. A. can do f as much as B, How many days will it take each to do it, work in IT alone ? Ans. 24} days for B. 32| days for A. 46. Three persons, A., B. and C., do a piece of work; A. and B. together do -J- of it, and B. and 0. do ^ ot it. What part of the work is done by B ? Ans. |~|-. -IT. A planter remits his factor $500 to invest in rice and coffee, in equal sums. He pays 9i^ per pound for rice, and 23|^ per pound for coffee. How many pounds of each did he purchase ? Ans. 2702|- ft> rice. 1069^ ft> coffee. 48: W. Quintel has $100 : he gives f of it for five bar- rels of flour, and J of the remainder tor 4 barrels of pota- toes, and with the remainder he buys coffee at 20^ per pound. How much coffee did he buy ? Ans. 200 Ib coffee. 49. C. Wehrmann owned -^ of a stock of goods : he Division of Fractions. 121 sold -J- of his share for $5000, and } of the remainder for $5000 . and then the balance of his interst for $15000. What part did he sell the last time, and what would the whole stock be worth at that rate ? Ans. || sold last. $27777-J value of stock. 50. What quantity, from which if you subtract f of itself, the remainder will be 15? Ans. 24. 148. MISCELLANEOUS EXAMPLES, INVOLVING THE PRINCIPLES OF ADDITION, SUBTRACTION, MULTI- PLICATION AND DIVISION OF FRACTIONS. 1. Find the difference between ^ and , $ and ^, ? and T 7 T , 3| and 2f , 4 and } of 3J ? Ans. to last, 3. 2. Find the sum of f of ^ and of / T . Ans. . 3. To the quotient of 2f divided by 5, add the quo- tient of 3 J divided by ^- r . Ans. 7 . 4. A number was divided by , and gave a quotient of 20, what was the number? Ans. 15. 5. What number is that, which being multiplied by ^ r gives as a product ^ ? Ans. f . G. What number is that, from which, if you take f of itself, the remainder will be 12? Ans. 30. 7. What number is that, to which, if you add -| of itself, the sum will be 40 ? Ans. 25. 8. A. owns f of a store which is worth $25000. He sells |- of his share ; what part does he still own, and what is it worth ? Ans. owns y 1 ^, worth $2500. 9. $mith owns y 5 r of a cotton mill and sells T 3 g- of his share to Jones for $33000 ; what is the mill worth at that rate? Ans. $242000. 10. John has 5 cents, and James J of 8 cents ; what part of James' money is John's? Ans. f. 11. One planter raised 500 bales of cotton, another raised 250 ; what part of the first one's crop is the second ? Ans. i. \'1'1 Arithmetical Exercises and Examples. 12. The sum of four fractions is 1;}. Three of the fractious are ^, i and f ; what is the fourth? Aus. -f 1 . 13. What number is that, to which it ^ of f of 1^- be added, the sum will be 1 j ? Ans. 1. 14. Two boys bought a bushel of oranges, one paying 2J dollars and the other 4 dollars : what part of it should each have? Ans. first, ^f ; second, f*. 15. A farmer sold - of his mules on Monday ; on Tues- day lie bought | as many as he sold, and then had 40 ; how many mules had he at first? Ans. f>(>. 16. F. Gernon gave , i and k of his money to different benevolent institutions, and had $1000 left, How much had heat first? Ans. S^IMMM). 17. J. D. Bothick owning -fa of a rice mill, sold of his share for $8800. What was the value of the mill? Ans. SLM200. 18. A book-keeper worked !>1 \ days, and after paying ii of f of his earnings for board and washing, had $1 inaiiiing. How many dollars did he receive in all, and how many per day ? Ans. $730 in all, $3 per day. 19. A planter gave 50 bales of cott >n at $50^ per bale for flour at $75 per barrel. How many barrels of flour did he receive ? Ans. 334. 20. Prophet ^an do a piece of work in 6, and Fisher can do the same in 8 days ; how many days will it take both together to do the work ? Ans. 3^ days. 21. Myers, Levy and Hoffman can do a piece of work: in 10 days ; JJyers and Levy can do it in 15 days ; in what time can Hoffman do it, working alone ? Ans. 30 days. 22. A man died and left his wife $14400, which was J of f | of his estate. At her death she left of her share to her daughter. How many dollars did the daughter receive, and what part was it of her father's estate ? Ans. $12000, ff of her father's estate. 23. A mule and dray cost $240; the mule cost If times as much as the dray. What did each cost ? Ans. $150 mule, $90 dray. Miscellaneous Problems. 123 24. A man engaging in trade lost ^ of the money he invested, he then gained $1000, when he had $3800 ; what did he have at first, and what was his loss? Ans. #4900 at first, $2100 loss. 25. Forcheimer lost f of his fish-line, and then added 25 J feet when it was just J of its original length. What was its original length ? Ans. 204 feet. 26. How many bushels of apples at $f a bushel, will pay for ^ of a barrel oranges at $6ir a barrel ? Ans. 7J bushels. 27. Sweeney paid % of his year's wages for board, f of the remainder for clothes, and had $80 left ; how many dollars did he receive for labor ? Ans. $560. 28. Purcell, having a certain number of cents, gave one- half of them and half a cent over to one beggar ; one-half of what he had remaining and half a cent ov> r to a second beggar ; and to a third, one-half of what he then had and half a cent over, and had left 3 cents. How many cents had he at first? Ans. 31 cents 29. Jol.n lives with his parents, but works for Mr. Smith who pays him $210 per year. His parents board him, but he has his clothes to buy. He spends ^ of his wages for cigars, -| of the remainder for theater tickets, of the remainder for wine, J of what he tfren has for nov- els. How much has he remaining at the end of the year to pay for his clothes ? Ans. $30. *30 Joseph worked on the same conditions as John. He gave ^ of his wages to the cause of charity, fa of the remainder for useful books, i of the remainder to be taught evenings, paid $100 for clothes, and deposited the balance in the bank. How many dollars did he put in the bank? Ans. $50. 31. W. T. Harris and C. E. Jones have $1899, Jones has 3J times as much as Harris ; how much has each ? Ans. Harris $422, and Jones $1477. 32. J. C. Beals can solve 25 problems in 50 minutes and 124 Arithmetical Exercises and Examples. H. H. Barlow can solve them in 30 minutes. In what time can both solve them ? Ans. 18:]- minutes. 33. E. Meyer purchased 200 barrels of flour for $1450 and sold J of it at a profit of $-1 per barrel, and the re- mainder at $7 1 1 Tr per barrel. How much did he gain ? Ans. $67.50. 34. What is the numerical value of Ans. 1 4 V 35. M. Ernst bought 3S41 -I pounds of cotton at 7 , : pence per pound; what did it cost ? Ans. 1-4, 11. (i 1 , <1. 36. J. W. Anderson has 3 dozen oranges which he wishes to divide between Miss Kate and Miss Lucy, so that Miss Kate shall receive ] more than Miss Lucy. How many will each receive? Ans. Mi>s K. 2n ami Miss L. 16. 37. A tree 110 feet high, had f of it broken off in a storm ; how much of it was left standing ? Ans. 44 feet. 38. What cost L'L' J pounds of coffee at 21 J/ per pound ? Ans. $4.94J|. 39. If 18? yards cost $3.37 what will 3J yards cost? Ans. 60 cents. 40. W. D. Maxwell has $600 of which he wishes to give to A. J, B. J, C. ^ and D. i ; how much will each receive? Ans. A. $200, B. $150, C. 120 and D. $100. 41. R. L. Paul has $600 which he wishes to give to A* B., C. and D. in the proportion of J, }, ^ and i ; how much will each receive? Ans. A. $210j|, B. $157}f C. $126^ and D. $105^. 42. C. M. Huber and A. J. Hohensee bought on specu- lation $800 worth of merchandise, of which Huber paid $500 and Hohensee $300 ; they sold to W. A. Tomlinson i of the whole for $400. How much of the $400 must Huber and Hohensee receive respectively, in order to con- stitute each J owner in the renriinder of the goods ? Ans. Huber $350 and Hohensee $50. Miscellaneous Problems. 125 43. If a yard and a half cost a dollar and a half what will twelve and a half yards cost? Ans. $12J. 44. If 3 is the third of 6 what will the fourth of 20 be? Ans. 7J. 45. Greo. Meyer owned a quantity of rice, of which he sold i for $99.60 ; what is f of the remainder worth at the same rate? Ans. $16.60. 46. F. Miller paid $60 for f of an acre of land ; what is the value of f of an acre ? A.ns. $50. 47. S. Benavides bought 937852J pounds of cotton at 1415^ p er pound ; what was the cost? Ans. $135695.53ff. 48. J. Koch invested } of his money in sugar, J in rice, | in coffee and deposited in bank $2645. How much money had he at first ? Ans. $63480. 49. L. Meyer spends i of his time in study, i in labor, i in rest and recreation, and the remainder in sleep. How many of the 24 hours of a day does he sleep? Ans. 7 hours. 50. A loafer spends 4 hours per day sauntering on street corners, 3 hours smoking and drinking, i of the day in sleep, i of the day in drunkenness, y 1 ^ in eating, T V in quarreling and the remainder of the day in gaming. How many hours does he spend in guming ? Ans. 3 hours. 51. An industrious young lady spends i of her time in the performance of household affairs, i in reading good books, y 1 ^ in physical exercise in the open air and sunlight, i in the practice of music, singing and parlor amusements, or social intercourse, 2 hours per day in eating, and the remainder of the day in sleeping. How many hours per day does she devote to each ? Ans. 6 hours to household affairs; 4 hours to reading; 2 hours to exercise ; 3 hours to music, etc.; 2 hours to eating, and 7 hours to sleep. 52. A fashionable young lady spends of her time in dressing, painting and making her toilet, J in reading nov- els and papers of senseless fiction, in making calls and 126 Arithmetical Exercises and Examples. gossiping, y 1 ^- in street promenading, ^ in criticising indus- trious young men, and speculating upon the qualities and fortune of an anticipated husband, J ? in making remarks derogatory to the ohanicti-r of those who labor, while her own mother is perhaps cooking or washing, T ^ in enter- taining young men, and the remainder in eating and sleep- ing. How many hours does she devote to useful service, and how many to eating and sleeping ? Ans. hours to useful service; 8 hours to eating and sleeping. 53. A man willed } of his property to his wife, J of the remainder to his daughter, and the remainder to his SOD; the difference between his wife and daughter's share was $8000. How much did he give his son ? Ans. $4800. 54. R. W. Tyler owned a J interest in a factory ; he sold to C. Modinger \ of his interest for $15000. What interest does he still own, and how much is it worth at the rate received for the part sold ? Anfe. he still owns f, worth $15000. 55. J. Cassidy owned I of the Steamer R. E. Lee. He sold to Gr. Buesing i interest in the Steamer for $20000 ; and to J. C. Beals \ of his remaining interest at the same rate. What did he receive for the last sale, and what is his remaining interest in the boat ? Ans. he received $30000 ; T 9 F remain- ing interest. 56. N. Puech and A. Palacio bought on joint account each J the New Orleans Cotton Factory. N. Puech sold J of his interest to 11. Krone, and subsequently J of his remaining interest to A. Palacio, who subsequently sold J of I of his whole interest to R. Lynd for $7500. What is the factory worth at the same rate, and what is each owner's interest? Ans. $32000 value of Factory ; Puech owns J ; Krone i ; Palacio |f , and Lynd -J-f . 57. L. Kaiser bought f of f of 28 J barrels of apples, Miscellaneous Problems. 127 and sold to S. L. Crawford f of 9 barrels for $20}, which was $1.50 more than the same cost. What was the cost of the whole, and how many barrels has he unsold ? Ans. $39^- cost ; 7*S barrels unsold. 58. W. D.Maxwell gives | of his annual income to aid meritorious young men in obtaining an education; J of the remainder for the publication and free distribution of books treating of the awful injury to the human race by the use of tobacco, tea. coffee and wine ; J of the second remainder for various benevolent purposes. The balance $5490 he retains for his own personal use ; how much does he give for each object named ? Ans. $8235 for meritorious young men ; $8235 for the publication and distribution of books ; and $2745 for various benevolent purposes. 59. What is the smallest sura of money for which I could purchase a number of bushels of oats, at $-f^ a bushel; a number of bushels of corn, at $f a bushel ; a number of bushels of rye, at $1 J a bushel ; or a number of bushels of wheat, tit $2| a bushel ; and how many bushels of each could I purchase for that sum ? Ans. $22 '. ; 72 bushels of oats ; 3G bushels of corn ; 15 bushels of rye; 10 bushels of wheat. 60. There is an island 15 miles in circuit, around which A. can travel in J of a day, B. in i of a day, and a horse car in $ of a day. Supposing all to start together from the same point to travel around it in the same direction, * how long must they travel before coming together again at the place of departure, and how many miles will each have traveled ? Ans. 10} days; A. 210 miles; B. 180 miles; Horse Car 525 miles. DECIMAL FRACTIONS. 150. A Decimal Fraction is one whose integral unit is divided according to the decimal scale ; therefore thedenomi- I'-.s Arithmetical Exercises and Examples. nator is some power of ten ; as 10, 100, 1000, etc. The word decimal is derived from the Latin word decem, which means ten. 151. The Decimal Point (.) is used to distinguish decimals from whole numbers. When there are mixed numbers, it also separates th> whole numbers from the decimals. The following are decimal fractions : y 8 ^, y 1 -^, T W^, a "d T^inr?; tn y are here written as common fractions, but generally the denominator of decimal fractions is omit- ted and the value i,s indicated by the location of the deci- mal point before the numerator. To write these fractions according to the decimal nota- tion, they would be written thus : T 7 ^ decimally expressed is . ,~. iW Decimally expressed is .If). yW tenths ; 41 and 25 hundredths. 155. A Complex Decimal consists of a decimal with a common fraction annexed. Thus .15J and .005i are complex decimals. They are read respectively, 15 J hundredths ; 5i thousandths. 156. A Circulating Decimal is one in which a fig- ure or set of figures constantly repeats itself. Thus J= .3333+, |=.142857 + , H=.7333o+. The figure or set of figures which is repeated is called a Repeteml. If the repetend consists of only one figure, a dot is placed over it ; if of a set of figures, a dot i placed over the first and last figures, as J=.3, J=.6, j*f=. i 9, '<^=. 142857. 157. .A Pure Circulating Dedmal is one which contains only the repetend ; as $.6, \. 142857, % 158. A Mixed Circulating Decimal is one which contains other figures than the repet ;nd ; at J=. ie, |jjj- .647. There are still other kinds of circulating decimals, but as they are of very little practical im )ortauc3, we will not here consider them. 159.- Decimal fractions, like whole numbers, decrease towards the right and increase towaids the left in a ten- fold ratio, and hence the prefixing of laughts between the decimal figures and the decimal poin,, or the removal of the decimal point towards the left diminishes their value ten- fold, or divides the decimal by tea for oach order or place removed, and conversely the removal ol the decimal point to the right, increases the value ten- fold or multi- plies the decimal by ten for each place retuov -d. Annexing naughts "to decimals does not change their 130 Arithmetical Exercises and Examples. value, because the significant figures are not thereby removed nearer to nor farther from the decimal point. Decimal orders are also called decimal y/A/m!<, from unity, the base of the system. The following table will illustrate more fully the relation of whole numbers and decimals, with their incrcasim: and decreasing orders to the left and right of the decimal point. TABLE. WHOLE NUMBERS. DECIMALS. cc TO 3 C3 .2 14 02 ^^ -f s I if Is .j *- rr d s. . en HJ aa sl'sll . GO'S 2 | & l| IF,: I 5 ? 73 s o ^ ^ - "^ ^SlJSflSj "O .C ^J g ns jj g.g'Tj g^^^o^^ ~ ^ S p S o a S ^ g(3|gt2^5 lllllwlll 98 7654321 .23456789 Orders of ascending scale. Orders of descending scale This number is read 987 million 654 thousand 321, and 23 million 456 thousand 789 hundred-millionths. In order to clearly understand decimals, we must bear in mind that the unit one is the basis of all numbers, inte- gral and fractional, abstract and denominate, and that all mathematical operations have this fundamental principle for their origin, and every number is but a multiple, either ascending or descending of unity or one. The names of the decimal orders are derived from the names of the orders of whole numbers. Thus the names of the orders in the ascending scale, are, after units, tr.ns, Decimal Fractions. 131 hundreds etc., and the orders in the decending scale, are, after units, tenths, hundredth^ etc., the decimal orders being the reciprocal of the orders of whole numbers equal- ly distant with themselves from the u iits. Numeration of Decimals. In reading decimal frac- tions the entire decimal is regarded as reduced to units of the lowest order expressed, and the name of this order is given to the entire number of decimal units. Thus .25 is read twenty -five hundredths. Before reading a decimal, we must determine 1st. How many units are expressed. To do this, we numerate and read the significant figures of the decimal as in whole num- bers. 2nd. We must determine the name of the lowest order in the decimal. To do this, we numerate the number dec- imally. Thus to read .001073, we c< mmence at the 3 and numerate to the 1 thousand, and thus find that 1073 units are expressed ; then we commence ao the decimal point and numerate decimally to the 3 and thus find that mil- lionths is the lowest order, we then re id 1073 millionths. 160. EXERCISES. Read the following numbers : 1. 16.008 ; reads thus, sixteen units and e ght thous- andths. 2. .94f ; reads thus, ninety-four and three-eights hund- reths. 3. 5067.4005 ; reads thus, 5067 units and 4005 ten- thousandths. 4. Write and read 197.8; 4.68907; .00073; 48.769- 146. 5. Write and read 2.491; 10.0101089167; 582.400- 410905. 6. Write and read 5841. 291f; 8000.0000000217; 9876541.1000001. 132 Arithmetical Exercises and Examples. 161. Writing Decimals. In writing decimals we write down the given number as if it were a whole nnmber ; then, to facilitate the operation, we numerate from right to left, beginning the numeration with tenth*, and continue until we come to the required place or order, always writing O's to fill the places not occupied by significant figures. Thus, to write 25 ten thousandths we first write the 2f> ; then we begin at the right and numerate thus, tenths, hun- dredths, thousandths, ten thousandths; by this we find that four places are required and as there are but two figures in the number we prefix two O's and obtain the correct result .0025. 1. Write 104 hundred thousandths. Ans. .00104. Explanation. According to the above diiections we write the 104 and then commence on the right and numerate thus; tenths, huudredths, thousandths, ten thousandths, hundred thousandths. This numeration shows that five places are required and as we have but tkrie we therefore prefix two O's. OPERATION. .00104. 162. EXERCISES. 1. Write 10101 hundred billionths. Ans. .00000010101. Write decimally, numerate and read the following : 2 314 millionths. 6. 1205 ten millionths. s! 12 thousandths. 7. 897 hundred billionths. 4. 107 billionths. 8. 1 isextillionth. 5. 1 trillionth. 9. 21001 ten vigintillionths. 10. _5* 14. 60409 17 87 1 100000000 10000 11. TOO 748^ If 15 18 7 12. TOOO 1000000 100 1042J 1 fi 1 -. ^ 990099 i 3 10. 1 i ii ii m: !i >MI K i *' i* 140 Arithmetical Exercises and Examples. J2. Multiply one hundred and fifty-three thousandths by one hundred and twenty-nine millionths. Ans. .000019737. 13. Multiply 1 thousand by 1 thousandth. Ans. 1. 14. Multiply 2 million by 2 billionths Ans. .004. 15. What will 37.23 tons of hay cost at $20.75 per ton? Ans. $772.52+. 16. What will 428.431 bushels cost at SI. 125 per bushel? Ans. $481.98+. 171. To multiply a decimal or mixed number by 10, 100, 1000, etc. 1. Multiply 428.375 by 100. OPERATION Explanation In all problems where 4-937 ^ *A *^ e mu ltiplier i 8 10, 100, etc., we sim- 4400*. Ans. ply remove the decimal point as many places to the right as there are naughts in the multiplier, annex- ing naughts if required. 2. Multiply 271.32 by 1000. Ans. 271320. 3. Multiply .756 by 100. Ans. 75.6. 4. Multiply .025 by 10. Ans. .25. 5. Multiply 61.052 by 10000. Ans. 610520. 172. DIVISION OF DECIMALS. 1. Divide 17.094 by 8.14. FIRST OPERATION. Explanation. In all problems 8.14)17.094(2.1 Ans. of this kind > we divide as in 1 fi 2ft whole numbers, and then point off as many places for decimals from the right of the quotient as the 814 number of decimal places in the div- 814 idend exceeds those in the divisor, observing to -supply any deficiency by prefixing naughts. In this problem the excess is one, and we therefore point off one deci- mal place in the quotient. The reason for thus pointing is obvious from the fact that in the dividend we had 3 decimals^ or thousandths, and in the divisor we hadi cU&imatjor frcTTrtrs^ ' and thousandths divided or decreased by t^atts* gives Iwwi- dretifcks as a quotient. The reason will also appear plain if we observe that the dividend is the product of the divisor and Division of Decimals. 141 quotient multiplied together, and hence we point off enough decimal places in the quotient to make the number in the two factors equal to the number in the product or dividend, accord- ing to the principles shown in the first problem of multiplica- tion of decimals SECOND OPERATION. Explanation. In this opera- 1000 814 1701)4 tion we reduce the decimals 100 to common fractions and then proceed as in the division of mixed numbers. The reduc- | ^y 1 ^- Arns. tion of the dividend and divi- Decimally written 2.1 Ans. sor to common fractions and then the mixed numbers to improper fractious, is performed thus : the dividend 17.094= 17 rVo 4 S7 .0103 Ans. dividend and none in the divisor, hence nccording to the forego- ;()/ I i"? instruction we must point ~ oft 4 decimal places in the quo- tient, and as there are but 3 fig- ures in the quotient we prefix 1 naught. In all problems of this kind, O's are prefixed to supply :niy ilvtieii'iiry of figures that may orenr. 14:! Arithmetical Exercises and Examples. 4. Divide 47.789 by 39.27. OPERATION. Explanation. 39.27)47.789(1.2168+ Ans. lem we have 3927 8519 7854 GG50 3927 Iu this prob- , remainder, after dividing the dividend, of 6G5 ; to this and the 2 suc- cessive remainders we annex O's and continue the division until we have produced 4 dec- imal places. The annexing of O's reduces the successive remainders to the next lower order of tenths and hence all quotient figures produced by annexing O's are decimals. We therefore, point off from the right of the quotient as many places for decimals as the number of decimals in the dividend exceed those of the divisor, plus the number of O's annexed. This is done in all division problems where O's are annexed, and a sufficient number of O's should be annexed to produce 4 or 6 decimal places. When there is a remainder after the last division the plus (-{-) sign should be annexed to the answer to indicate that the quotient is incomplete. 7. Divide .112233 by 12. 27230 235G2 3GG80 31416 5. Divide 1.12233 by 12. OPERATION. 12)1.12233 8. 9352+r=.09352 + Ans. Divide 11.2233 by 12. OPERATION. 12)11.2233 9. .9352+ Ans. Divide .0004869 by 396. OPERATION. 396)4869(12+ Ans. 396 =.0000012+. 909 792 117 OPERATION. 12). 112233 9352+=.009352+ Ans. , Divide 112.233 by 12. OPERATION. 12)112.233 10. 9.3627+ Ans. Divide .0004869 by 3.96. OPERATION. 3.96). 0004869(12+ Ans. 396 =.00012 -f- 909 792 117 Division of Decimals. 143 11. Divide .0004869 by .0396. FIRST OPERATION. .0396).00048t>9(122-r Ans. 396 =.0122 + 909 792 1170 792 378 SECOND OPERATION. 396)4869(122-f-=.0122-f Ans. 396 909 792 1170 792 378 12. 13. 14. 15. 16. 17. 18. 19. 20. Divide 67.8632 by 32.8. Divide 983 by 6.6. Divide 13192.2 by 10.47. Divide 67.56785 by .035. Divide .00125 by .5. Divide 7.482 by .0006. Divide 1 by 999. Divide 84375 by 3.75. Divide 1081 by 39.56 Divide 35.7 by 485. Ans. 2.069. Ans. 148.939+. Ans. 1260. Ans. 1930.51. Ans. .0025. Ans. 12470. Ans. .001001+. Ans. 22500. Ans. 27.3255+. Ans. .0736+. 21. 22. If rice costs $.0775 per pound, how many pounds can be bought for $40.64875 ? Ans. 524:5 pounds. 23. Sold 14.75 acres of land for $191.75. What was the price per acre? Ans. $13. 24. Divide four thousand three hundred twenty-two, and four thousand five hundred seventy-three ten-thous- andths by eight thousand and nine thousandths. Ans. .5403+. 173. To divide Decimal Fractions by 10, 100, 1000, etc. 1. Divide 48.76 by 10. OPERATION. Kxpltnation. In all problems of this 4.876 Ans. kind we simply remove the decimal point as many places to the left as there are O's in the divisor. The reason for this was fully shown on page 133. When there are not a sufficient number of figures in the dividend to alkw this to be done naughts must be prefixed to supply the defi- ciency. IN Arithmetical Exercises and Examples. 2. Divide 875.25 by 100. Ans. 8.7525. 3. Divide .52:n by 1000. Ans. .0005231. 4. Divide 72 by LOOOO. Aris. .0072. 5. Divide 9.85 by loo. Ans. .0985. 0. Divide .025 by 200. Ans. .000125. 7. Divide 412.99 by 10. Ans. 41.299. 174. MISCELLANEOUS PRACTICAL PROBLEMS. Much a* occur /;/ fhr c<;itnfin(/ rut nn. fnctnry. irurkxhop, on the plantation^ am/ in the nir/W.s departments of bu- i life. 1. What is the cost of 1465 pounds of corn at 84 cents per bushel, and how maov bushels are there? Ans. S21.97} cost. 2t; Bush., 9 flbs. 2. Sold 51*94 pounds of hay at $23.75 per ton. How many tons were there, and what was the value of it? Ans. 2 tons, 1294 Ibs. $62.86| value. I. Pxui-ht 320-42 bushels of wheat at $1.95 per bushel. What was the cost? Ans. $625. HOA. 4. Bought 11361 pounds of dried peaches at $5.80 per bushel. How many bushels were there and what did they cost? Ans. 34 bushels. 14} Ibs. $199.74ff'cost. 5. Bought 15 bushels and 31 pounds of corn at 78} cents per bushel. What was the cost ? Ans. $12.20if|. 6. Bought 3 coops of chickens containing 2 dozen and 7 chickens each, at $4.35 per dozen. What did they cost? Ans. $33.71}. 7. What will 74 pounds and 11 ounces of butter cost at 42} cents per pound? Ans. $31.74-^. 8. Bought 36 pounds and 7 ounces of tea at $1.12} per pound. What did it cost ? Ans. $40.99^-. 9. Butter is worth 45 cents per pound. How much can be bought for 20 cents ? Ans. 7-^ ounces. Miscellaneous Practical Problems. 145 10. What is the cost of 31845 feet of lumber at 22.25 per M. ? Ans. $708.55J. 11. What will 183 feet of lumber cost at $25.75 per M. ? Ans. $4.71 T V 12. Bought 3 bales of hay weighing as follows: (1) 421 pounds (2) 394 pounds, (3) 487 pounds, at $22.50 per ton. What did it cost ? Ans. $14.64f. 13. Sold 3] dozen boxes Spencerian pens at $108 per gross. What did they amount to? Aus. $29. 2.1. 14. How much coffee can I buy fur 5 cents when a pound costs 28 cents? Ans. 2^ ounces. 15. What is the cost of 400 T. 2 cwt. 3 qrs. 20 Ibs. of iron at $60 per ton of 2240 pounds ? Ans. $24008.784. 1 G. A planter shipped 6 dozen dozen boxes of peaches to market, but being delayed on the way -I a dozen dozen boxes spoiled ; the remainder were sold it 70 cents per box. What did they amount to? Ans. $554.40. 17. Bought 12 dozen and 5 huts at $11 per dozen. What did they cost ? Ans. $136.58$. 18. Wh;it. is the amount due for the freight of 40000 % pounds of merchandise fur JMJ5 miles at fn' for 100 pounds for 100 miles? Ans. $193. 11). What is the cost of 2381 J pounds of cotton at 17|| cents IHT pound ? Ans. $ t24.24f|. 20. What is the cost of a 14 carat gold chain that weighs 4 o/. 7 pwt. 15 gr. at $1.20 per pwt. for pure gold, allowing > <' per irrain on full weight for manufacturing and the alloy? Ans. ^71.85*. 21. A hardware merchant received from Liverpool an invoice of iron weighing 2 T. 2 cwt. 3 r>i. 28. What* is the value of 11428 fence pickets at $9 per M? Ans. $102.852. 29. What is the value of 1364 pine apples at per C.?' Aus. 30. What is the cost of 2417 cocoanuts at C.? Ans. 31. What is the value of 78420 railroad ties at $75 per M.? Ans. $5881.50. ',\'2. What is the freight on 540 bales cotton, weighing 243084 pounds, |d. per pound from New Orleans to Liv- erpool? Ans. 633 Os. 7 3d. 33. What is the freight in United States currency on 25000 bushels corn from New Orleans to Liverpool, at 24s. per imperial quarter of 480 pounds ; allowing 1 to be equal to $4.87 ? Ans. $17045. 34. How % many square feet in a pavement 120 feet 4 inches long and 10 feet wide? Ans. 12U3J sq. feet. 35. How many square yards in a plat of ground 140 feet 3 inches long and 64 ieet 6 inches wide ? Ans. 1005i sq. yards. 36. How many squares in the roof of a building 78 feet 6 inches long, and 48 feet 4 inches wide ? Ans. 37.94J squares. 37. How many square yards of plastering in the walls and ceiling of a room which is 40 feet 6 inches long, 24 feet 8 inches wide, and 14 feet high, deducting 3 square Miscellaneous Practical Problems. 147 yards for doors, windows and base-hoard, and what will it cost at 35 cents per square yard ? Ans. 279ff sq. yards. $97.90ff cost. 38. How many sq. feel in 8 boards, each measuring 16 feet long and 17 inches wide, and what will they cost at 2i/ per foot? Ans. 181i feet. $4.53J cost. 39. How many square feet in 13 pieces of plank, each measuring -0 feet 6 inches Jong, 14 inches w^de and 3 inches thick, and what is the cost at $23 per M.? Ans. 932| feet. $21-453} cost. 40. How many square feet in a circle, the diameter of which is 12 yards? Ans. 1017.8784 sq. feet. 41. How many shingles will it require to shingle a building, the roof of which measures 44 feet 7 inches from cave to cave, without allowances, by 50 feet 4 inches long, allowing a shingle to cover a space 4 inches wide and 5 inches long ? Ans. 16157. 42. A. yard is 24 feet 3 inches long by 11 feet 5 inches wide ; how many brick, 4 by 8 inches will it take to pave it, no allowance to be made for the openings between the bricks? Ans. 1245$ J, 43. How many square yards of paving in a sidewalk 64 feet long and 11 feet 8 inches wide? Ans. 82|^ square yards. 44. How many flags, each 16 inches square, will it require to flag a walk 22 yards 1 foot 4 inches long and 6 feet 8 inches wide ? Ans. 252"J. 45. How many yards of carpeting that is 27 inches wide, will it take to cover the floor of a room that is 25 feet 6 inches long, and 22 feet 9 inches wide, making no allowance for waste in matching or turning under? Ans. 85j- yards. 46. A water pipe is 50 feet 9 inches long, and its diam- eter is 30 inches ; what is its concave surface ? Ans. 57397.032 inches. 148 Arithmetical Exercises and Examples. 47. How many cubic feet in a box 5 feet long, 3 feet wide and 4 feet deep ? Ans. 60 cubic feet. 48. What is the freight on a box 6 feet 4 inches long, 4 feet wide and 3 feet 9 inches deep at 25 cents per cubic foot? Ans. $232. 49. What will be the freight on a box 9 feet 3 indies Ion-, 4 feet 6 inches wide, 2 feet 10 inelh- de p. at 30 c -iits a cubic foot? Ar.s. $3r> : 50. How many bushels will a bin hold, that is 10 feet long, 8 feet 6 inches wide, and 5 feet 2 inches '.cep? Ans. :;:>LVJO-|- bushels. 51. How many cords of wood in two ranks, each 4-1 fret long and 6 feet 3 inches high? Ans. 1 7 , :l ( . cords. 52. How many barrels will a (jiiadi ilatcral cistern hold, whosejieight is 12 feet and width of side f> icet S inches? Ans. HI-,*; 2 , 1 ; ban 53. How many cubic yards in a levee 80 rods loiiir, IO feet wide at the base, 12-j feet at the top, and 5 feet 1 ineln s average depth? Ans. IM.V 54. How many gallons will a box hold, that is f> fed long. 2 feet 4 inches wide, and 3 feet deep ? Ans. 201.81 + gallons. 55. How many cubic feet in a cylinder U fret long 3 ieet 4 inches in diameter? Ans 52.36 cubic feet. 50. IIow many gallons in a cylindrical cistern, 9 feet b* inches high, and 7 feet 2 inches in diameter? Ans. 28(Hi.<)S!Mi gals. 57. How many pints in a cylindrical vessel, whose height is 14 inches and diameter 12-1 inches? Ans. 59.5 pints. 58. How many bushels in a cylinder shaped box. whose height is 10 feH, and diameter 10 feet? Ans. 031.125 bu. 59. How many cubic feet in a frustum of a cone, whose height is 6 feet, diameter of the greater end is 4 feet and of the smaller end 3 feet? Ans. 58.1196 cubic feet. 60. How many gallons in a cistern which is in the form of a frustum of a cone, whose height is 9 feet inches, Bills and Invoices. 149 lower base 7 feet 2 inches, and upper base 6 feet 8 inches ? Ans. 2671.3392 gals. 61. A farmer has a heap of grain in a conical form, the diameter of which is 14 feet 4 inches, and the depth 5 feet 3 inches ; how many bushels does it contain ? Ans. 226.906. 62. A barrel i* 26 inches long, 17 inches in diameter at the head, and 20 inches in diameter at the bung or center. The staves have a medium curve. How many gallons will it hold? Ans. 3 1. 244 -f- gallons. For full in ormation and a thorough elucidation of all questions pertaininir to the mensuration of surfaced and solids, as contained in the foregoing miscellaneous problems, and in the following bills, see Soule's Philosophic Commer- cial and Exchange Calculator, pages 741 to 796. 174. BILLS AND INVOICES. Bills in a general sense, embrace all written statements of accounts and many legal instruments of writing ; but in a more common and limited sense they are statements of goods sold or delivered, services rendered or work done, with the price or value, quality or grade of each article or item. They should state the place and date of each sale, the names of the buyer and seller, the extra charges or discount to be allowed, and the terms of the sale. When goods are bought to sell again, or when bills are rendered to a jobber or retailer, or consigned to an agent, the bill is then called an invoice. It is the custom of accountants and merchants, when making bills to commence the name of each article with a capital. When a charge is made for the box, barrel, jar etc. contain- i Q g goods, it is customary to write its price above and to the right of it and add the same to the cost of the goods it con- tains. In making extensions, fractions of cents are not used in the 150 Arithmetical Exercises and Examples. product ; when they are \ or more they are counted cents when they are less than J they are not counted. In making the following bills, students should use pen and ink and give earnest attention to the proper form and spacing, to plain, neat and rapid penmanship of both words and figures, and above all to the accuracy of extentions and additions. When notes or bills of exchange are given in payment, the student should draw the same and correctly mature them. No. 1. NEW ORLEANS, Jan. 2, 1877. H. A, & R. C. Spencer, TERMS Cash. Hot. of A. L & E. Soule. 1876 Dec. u; 2 bags Rio Coffee, 325 Ibs. @ $ 23ic. $ 76 38 50 c. 1 bbl. Sugar, 234J Ibs. 9 c. 21 61 i Chest Black Tea, 35 tbs. " 87 Jc. 30 63 1 bbl. Rice, 24^-1 6 =227" 8 c. 18 16 40 gal. N. 0. Molasses 75 c. 30 00 6 doz. Brooms 4.15 24 DO 3 bbls. XXX Family Flour" 8.12J 24 38 25 Ibs. Cream Crackers 16 c. 4 00 50 Ibs. Graham do " 15 c. 7 50 20 Ibs. W. Butter 30 c. 6 00 Rec'd pay't, $243.56 A. L. & E. SOULE, Per S. Richardson. Bilk and Invoiees. No. 2. 151 Nfcw ORLEANS, Jariy 31, 1877. S. S. Packard and E, G, Folsom, Bot. of W. E. and Frank Soule. TERMS Note at 30 days. 1877 Jan. 31 453 Ibs. Mocha Coffee, @ $ 25 c. 241 Rio Coffee, 18|c. 31 6 1 C. Sugar, 12Jc. 72 Duryea's Starch, 6ic. 64 N. Y. C. Cheese, 17ic. 52 W. F. Cheese, 15 c. 180 B. Sugar, 7*c. 80 doz. C. Eggs, 37 ic. 42 gals. N. 0. Molasses, 62c. 320 Ibs. G. Butter, 35 c. 23 " Almonds, 27 c. 76 Y H. Tea, 74 c. 68 boxes Shrimp, 48 c. 84 boxes Lobsters, 34 c. 92 gals. N. 0. G. Syrup, 96 c. 114 B. Whiskey, 1.08 112 bags Salt, 93 c. 320 Bbls. Sweet Potatoes, 1.25 S2 kits, No. 1 Mackerel, i50 63 Ibs. S. Crackers, 11 c. 24f " P. L. Soap, 8Jc. 18i " Codfish, 9Jc. Drayage $31.25, boxes $2.50. Rec'd pay't by note at 60 days, $1,492 09 W. H. & F. SOULE. per J. J. Manson. NOTE. All of the extensions of this bill should be made mentally apid mental work see SoulS's Contractions In Numbers. For Arithmetical Exercises and Examples. No. 3. NEW ORLEANS, Jariy 31, 1877. Bot. of J. B. Cundiff. J. M. Butchee, TERM r.Mlit. 875 bbls. Nes. Potatoes @ $ 4.25 H() l P. B. Potatoes, 3.87 J 325 l Perfect' n Flour, 8.50 i:*.24 St. L. XX " 6.62J 1 1 2 l F'ily Clear Pork ' 650 ' Prime Pork, 17.50 13.75 220 kegs Pig Feet, 1LM h.lfbblsF.M. Beef, l 7.50 11. 1ST 2 Ibs. Choice Ham, 289 " B. Bacon, 10(J Piir Tonnes, 14 c. 9Jc. 8 c. Rec'd pay't, $31167 27 NOTE All the extensions of this bill shall be made mentally. E. C. Spencer & Co., TERMS Cash. o. 4. NEW YORK, Dec. 8, 1876. Bot. of B. D. Rowlee & Co. 20 doz. Missionary Bibles, @ $15.25 108 " small New Testam't, u 2.50 65 " Prayer Books, >< 2.25 65 " Hymn Books, " 3. 3 Bible Dictionaries, " 4. i doz. Webster's Dict'ry u 50. Rec'd pay't, $ 953 25 B. D. ROWLEE & CO. Per E. Conrad. Bills and Invoices. 153 Wm. Melchert & Co., No. 5. NEW ORLEANS, Jariy 31, 1877. Bot. of L L Willi&ms & Go. 321 Ibs. Tobacco Low Lugs, (a). 6 c. 1140 u " Med. Lugs, - 7Jc. 509 u i Low Leaf, ' 9ic. 965 u Med. Leaf, 1 11 Jc. 398 u i Good Leaf, ' 13fc 2416 u i Fine Leaf, < 15 c 713 U t Selections. ' 16|c. Bryant and Nelson, TERMS Dft. 30 days. Rec'd pay't, $ L. L. WILLIAMS & CO. No. 6. NEW ORLEANS, Dec. 17, 187 1). Bot. of Wm. Horn & Go. 1876 1420 Ibs. Su^ar, Common, @ 5c. 1927 ' " Good, l 71c. 2810 4 ^ Fair. ' 7ic. 902 < "'Prime, ' 8Jc. 813 ' " Choice, 9}c. 2741 ' Yellow Cent'al ' lOJc. Rec'd pay't, $ No. 7. NEW ORLEANS, Dec. 23, 1876. Montgomery & Lettellier, TERMs-3 mos. Bot. of Sadler & Smith. 1 Gross Chewing Tobacco @ $13. 180 Ibs. Smoking do 1.40 6 M. Havana Cigars ' 70. 2 M. N. 0. Manufacture do : > 30. Rec d pay ? t. 154 Arithmetical Exercises and Examples. No. 8. NEW ORLEANS, Jariy 21, 1877. Jones and Carpenter/ Bot. of Stewart & Henderson. TERMS Note 60 days. 1877 34 bbls. La Orange, large, @ $5.75 27 boxes Messina Lemons, " 6.00 03 cases Malaga Grapes, " 1.75 45 boxes California Pears, " 4.50 5 mats Dates, 593 Ibs., " 7ic. Rec'd pay't, by note at 60 days. $ STEWART & HENDERSON. No. 9. NEW ORLEANS, Nov. 17, 1876. Geo. B. Brackett & Co., Bot. of R. Spencer Soule, TEKM8 Cash. 1427 bu.No.l Winter Wheat $1.55 856 " No. 2 Winter Wheat " 1.47 420 " 111. No. 1 White do " 1.41 3145 " W. Corn " .70 1040 a B. Oats " .55 Rec'd pay't, $ R. SPENCER SOULE. No. 10. NEW ORLEANS, Feb. J., 1877. F. L & W. P. Richardson, Bot. of P. W. Sherwood & Co. TERMS 1 mo . ;0 box. Sperm Candles, 596 Ibs. @ .35J 24 do. Adam. Ex. do. 483 " " .28 15 do. Sil. Gloss St'rch 360 .lOfi Rec'd pay't. : Bills and Invoices. 155 Eeald & Howe, TERMS Due Bill 1 mo. No. 11. NEW ORLEANS, Jan. 19, 1877. Bot. of Cole & Montague. 342 Ibs. La. Pecans @ $ .13 289 " Taragona Almonds 175 " Naples Walnuts " 196 " Brazil Nuts " .21 .17 .11 268 " Western Chestnuts .18 160 Boxes Figs 585 Cocoanuts @ $45 per M. 61 Bunches Bananas .20 1.75 14 do. Plantains " .85 327 Pine Apples @ $80 per M. Hibbard & Gray, TERMS Cash. Rcc'd pay't, $ COLE & MONTAGUE. No. 12. NEW ORLEANS, Feb. 1, 1877. Bot. of Odell & Faddis. 2714 Ibs. Black Moss @ 4 / 1829 " Gray do. 1J/ 913 " Wool < 24 / 74 " Live Geese Feathers " 65 / 1528 Packages Broom Corn " 6 ^ 752 Ibs. Baling Twine " 14 / 800 yds. Indian Bagging " 11 ft Rec'd pay't, $ ODELL & FADDIS, Per C. P. Meads. 156 Arithmetical Exercises and Examples. No. 13. NEW ORLEANS, Jan. 7, 1877. Spaulding & Musselman, Bot. of Warr & Bogardus. TERMS 60 days. 78i yds. Black Silk, @ $2.90 148 Muslin, < 16 c. 62 Cassimeres, 1.75 -38} Blk. F. Broadcloth 5.25 45 " " Doeskin, 1.50 324 American Satinets, ' 95 c 3 cases, each 40 psr Amos- keag Sheetings, 1123 1 1 1204 L 3423} yds. " IT-'.c. 1096 2 j J 142 yds. 6-4 Alpaca, " 32 c. 560 " Union Ginghams, " ll}c. 491 " Am. Fancy Prints, " 12 c. 107 " Manch'ter Delains, " 21}c. . 10 doz. Handkerchiefs, " 2.15 Ladies Hose. * 2 ps. 61 j yds. Can. Flannel u 18 c. Rec'd pay't, \ \ Tasker & Felton, TERMS Cash. Bills and Invoices. 157 No. 14. NEW ORLEANS, Feb. 8, 1877. Sot. of Allen & Shields. 50 Ibs. Casing Nails, @ $ 7c. i; duz. Mortice Locks, u 7.50 * " Porcelain Knobs, U 4.75 5(1 pr. Butts, U 25c. ' Gross Screws, u 75c. I 8 bars, \\ X 2 Bar Iron, 254 Ibs., u 5c. 2 Rowland No. 2 Spades, u 1. Lee and Ward, TERMS Due end mo. Rec'd pay't, $ ALLEN & SHIELDS. No. 15. NEW ORLEANS, Mar. 9, 1877. Bot. of Harris & DeRussy, ?> reams Cap Paper, -@ $3.25 2 doz. Ebony Rulers, 3.50 4 6 qr. Med. Ledgers 24 qrs. 1.75 33" Demy Journals, 9 " 1.25 33 " Cash Books, 9 " 1.25 3 6 " " Sales Books 18" 1.15 4 gross Pen-holders, 2.10 1 doz. Black Ink, 4.50 } ream Blotting Paper, 2.5() 2 doz. Mucilage, 2.75 3 " Carmine, 2.15 doz. Bill-books, 4.25 Rec'd pay't, 158 Arithmetical Exercises and Examples. No. 16. NKW ORLEANS, April 1, Jf ft. 2 in. x 3 ft, in. x 2 it. 11 in. = Nos. 7 & 8, 12 ft. 3 in. x 2 ft. 1 in. x 1 ft. 6 in. = ' Rec'd pay't, 160 Arithmetical Exercises and Examples. 0. Emmet & Co., No. 20. NEW ORLEANS, Jan. 4, 1877. To B. Criswell. Dr. For rent of house No. 386 Dryades St., from Oct. 7, 1876, to Jan. 1, 1877, 2ff months, @ $35 For services as collector from Sept. 19, 187*, to Jan. 4, 1877, both inclu- sive, 3-J-| months, @ $75 Rec'd pay't, No. 21. The la. Levee Co., NEW ORLEANS, Jan. 9, 1877. To James Selleck & Co. For Constructing cubic yards Levee @ 45/ as per the follow- ing measurements : 1st Section 890 T % ft. long, 70 ft. wide at the base and 30 ft. at the top, with an average depth of 8-^ ft. 2nd Section 165 ft. long, 60 and 25 it. respectively for the lower and upper widths, and 6, 7?, 5i, 8, 9, and 6* ft. in depth at different points. For Excavating - cubic yards Earth @ 45/, the same being the contents of a cellar measuring as follows : 92 ft. long and 50 ft. wide at the top and 86 ft. long and 44 ft. wide at the bottom, average depth 8 ft. 4 in Rec'd pay't, Bills and Invoices. 161 Geo, Soule, No, 22. NEW ORLEANS, Jan. 16, 1877. To Clark & Eofeline. Dr. For composition Arithmetical Exercises and examples 180 pp., 1600 ems a page, @ 75c. per m. For press work on 54 token, @ $ 50c. For 4 Reams Paper, u 6.00 For Binding 500 sep., " 25c. Rec'd pay't, $ CLARK & HOFELINE. No. 23. NEW ORLEANS, Jan. 18, 1877. Western Union Telegraph Co., To Jacob Simon & Co., Dr. For cubic feet Timber $24 per 100 ; the same being the contents of 50 Telegraph polos measuring as follows : 40 Poles are 70 feet long, 16x16 inches at the larger end and so 12- *inain for a distance of 10 feet, at which point they begin and taper regularly to the smaller cud', whi(-h is 6x6 inches. 10 Poles are 60 feet long, 16x12 inches at the larger end, 6x4 inches at the smaller end, and ti jer reg-i larly the whole length. Rec'd pay't. 162 Arithmetical Exercises and Examples. No. 24. NEW ORLEANS, Jariy 29, 1877. S. Drey fuss, To V. Keiffer. Dr. Jan. 1 To old balance, as per bill rendered. 91 10 6 12 cords Ash Wood @$7. 84 00 6 4 cords Oak Wood " $6.50 26 00 14 50 bbls. Pittsburg Coal " 60c. 30 00 $231 10 Cr. 8 By Cash $50 21) " 6 days Labor, at $4, 824 74 00 Balance due Jan. 2 ( J, 1877. $ 157 10 Settled by note at 60 days. V. KEIFFER. A. & S. H. Souk, No. 25. NEW ORLEANS, Jan. 12, 1877. To Z, M. Pike & Co. Dr. To 4378 feet Com. Boards @ $21. per m. " 1760 feet Dressed Flooring " $28.50 per m. " 5125 Bricks " $14.25 per m. " 9250 Cypress Shingles $6.50 per m. " Cartage and Labor Rec'd pay't, 14 25 Levy & King, Bills and Invoices. 163 No. 26. NEW ORLEANS, Dec. 81, 1876. To R. & C. Rice, Dr. For -- sq. yds. North River Flags @ $7.50 as per the follow- ing measurements : Nos. 1, 2 & 3, are each 4 ft. 3 in. by 3 ft. 6 in. = sq. ft. Nos. 4, 5 & 6 are each 4 ft. 8 in. by 3 ft. 4 in. = sq. ft. Nos. 7 & 8 are each 4 ft. in. by 3 ft. in. = sq. ft. Nos. 9, 10 & 11 are each 3 ft. 4 in. by 2 ft. 9 in. = sq. ft. For sq. yds. German Flags @ $2.25, comprising 152 Flags, each 22x16 inches. For --- sq. yds. Brick Pavement @ $1.15, contained in a side- walk measuring 124 ft. 4 in. long by 11 ft. 9 in. wide. For 124 ft. 4 in. Curbing ty $ 1.30 For - cu. yds. Granite u $16.00 contained in 23 blocks of stone measuring as follows : Nos. 1 to 7 inclusive, are each 26xlx 10 inches, = Nos. 8 to 20 inclusive, are each 2ox 16x9},= Nos. 21 to 23 inclusive, are each 42x35x21 inches, = Rec'd pay't, $ 164 Arithmetical Exercises and Examples. No. 27. NEW ORLEANS, Jan. 28, 1877. Invoice of Sundries, purchased by J. Simmons & Co. and shipped per Steamer La Belle, for acc't. and risk of James Byrnes, Shreveport, La. 87 bbls. Molas's, 3498 gals. @ 60c. 20 hhds. Sugar, 23780 Ibs. " 9c. 10 bbls. Rice, 2150 Ibs. " 5c. 4346 50 Drayage 17 50 Insurance on $4800.40 " l%- 35 00 Commission on $4364.00 " 21%. 109 10 4503 10 No. 28. W. H. Carey. NEW ORLEANS, Jan. 14, 1877. To Geo. Jumonville, Dr. For Slating a roof measuring 72 ft. 4 in. by 49 ft. 10 in. and contain- ing squares (a/, $14.50 For 239 ft. Guttering .90 Rec'd pay't. No. 29. NEW ORLEANS, Feb. 1, 1877. Mississippi Valley Transportation Co., To Buck & Richardson, Dr. For Servises rendered in cause No. 55472. "Steamer R. E. Lee and owners vs. Miss. V. T. Co." Rec'd pay't. Bills and Invoices. 165 No. 30. NEW ORLEANS, Nov. 4, New Orleans, 'St. Louis and Chicago R. R., To W. L. & E. Sail, Dr. For 150 Cisterns holding @ 2J^ per gal. The inside measurement of each cistern is as follows: 11 ft. o in. perpend cular height, lower base 9 ft. '1 in. and upper base 8 ft. 5 in. Rec'd pay't. TABLES OF WEIGHTS AND MEASURES. 175. Weight is that property of bodies by virtue of which they tend toward the center of the earth, and the resistance required to overcome this centralizing pressure, or gravitating tendency of bodies, is what is named weight; Weight varies according to the quantity of matter a body contains, and its distance from the centre of the earth. 176. A Measure is a standard unit established by law or custom, by which quantity, such as extent, dimension, capacity, amount or value, is i: easured or estimated. There are seven kinds of measure : 1st. Length. 2d. Surface or Area. 3d. Solidity or Capacity. 4th. Weight or Force of Gravity. 5th. Time. 6th. Angles. 7th. Money or Value. COMPARISON OF STANDARD UNITS OF MEASURE. 1. The Yard 3 feet 36 inches. 2. The Meter 3.2808 feet 39.37 inches'. 3. The Vanir-2.7778 feet 33J inches! 4. The Troy and Apothecaries pound=12 oz.=:5760 grains. 5. The Avoirdupois pound=16 oz.= 7000 grains. 6. The Wine gallon= 231 cubic inches. 7. The Beer gallon (nearly obsolete) 282 cubic inches. 8. The Dry gallon 268.8 cubic inches. H5(i Arithmetical Exercises and Examples. 9. The Imperial gallon of England 277.274 cubic inches. 10. The Bushel=r:4 pks.^32 qts.=64 pts.=: 2150.42 cubic inches. 11. The Imperial Bushel of England 2218.192 cubic inches. 12. The Diamond grain is equal to .8 of a grain Troy. 13. The Gallon, wine measure, of distilled water weighs 8.3388 pounds Avoirdupois or 10.134 pounds Troy. 14. The Civil Dan rrmmriK <.-.< ami oiids at midnight, and the Astronomical Day, at noon of the Civil Day. 15. The Kntur />^ Arithmetical Exercises and Examples. The number of days in each, may be readily remembered by committing to memory the following lines : " Thirty days hath September, April, June, and Novemlu-r ; And all the resth;i\< thirty-one, Save F'l.ru;iry, \vhich alone Huth twenty-eight; and this, in fine, One year in four hath twenty -nine." (LINE) LINEAR OR LONG MEASURE. TABLE. 12 Inches (in.) = 1 Foot, ft. 3 Feet = 1 Yard, yd. 5J Yards or 16Jifeet = 1 Rod or Pole, rd. or po. 40 Rods = 1 Furlong, tur. 8 Furlongs = 1 Mile (Statute Mile) m. 3 Miles = 1 League, lea. MARINERS' MEASURE. TABLE. 6 Feet = 1 Fathom. 120 Fathoms = 1 Cable-length. 880 Fathoms or 7J Cable-lengths = 1 Mile. A knot, or geographical mile, is -fa of a degree, and is equiva- lent to 1.15257 statute miles. The length of a degree at the Equator is nearly equal to 69J statute miles. The length of an average degree on the meridian is 69.042 statute miles. MISCELLANEOUS UNITS OF LINEAR MEASURE. of an Inch = A Line (American). of an Inch = A Line (French). 4 Inches = A Hand. 3 Inches = A Palm. 9 Inches = A Span. 3 Feet = A Pace. 2J Feet (28 in.) = A Military Pace. Tables of Weights and Measures. 169 CLOTH MEASURE. TABLE. 2J Inches (in.) = 1 Nail, na. 4 Nails (9 inches) = 1 Quarter. qr. 4 Quarters = 1 Yard, yd. This table formerly contained : The Flemish Ell, which equaled 3 quarters or 2*7 inches ; The English Ell, which equaled 5 quarters or 45 inches ; The French Ell, which equaled 6 quarters or 54 inches. These units of measure are nearly out of use. SURVEYORS' AND ENGINEERS' MEASURE. TABLE. 7.92 Inches = 1 Link, li. 25 Links = 1 Rod or Pole, rd. or po. 4 Poles or ) . n , . , 66 Feet } = l Cham ' ch " 80 Chains = 1 Mile, m. Engineers use another chain which consists of 100 links, each 1 foot long. SQUARE OR SURFACE MEASURE. TABLE. 144 Square Inches (sq. in.) = 1 Square Foot, sq. ft. 9 Square Feet = 1 Square Yard, sq. yd. 301 Square Yards } ' ^J^ ^ 40 Square Rods or Perches = 1 Rood, r. 4 Roods = 1 Acre, a. 640 Acres 1 = l Square Mile, sq. m. / or Section, sec. 36 Square Miles (6 miles sq.)= 1 Township, T. 16 Perches = 1 Square Chain, sq. ch. 10 Square Chains = 1 Acre, 170 Arithmetical Exercises and Examples. CUBIC OR SOLID MEASURE. TABLE- 1728 Cubic Inches 27 Cubic Feet 16 Cubic Feet 8 Cord Feet or 128 Cubic Feet 24J Cubic Feet, or 16J feet long, 1} high and I foot wide 40 Cubic Feet of round timber, 50 Cubic Feet of hewn timber I = 1 Cubic Foot. 1 Cubic Yard. 1 Cord Foot 1 Cord of Wood. 1 Perch. 1 Ton or Load. A cubic foot contains 7 4805 Wine gallons. A cubic foot contains .2374 barrels " A cubic foot contains .8082 bushels. LIQUID MEASURE. TABLE. 4 Gills (gi.) 2 Pints 4 Quarts 31J Gallons 2 Barrels or 63 gallons 2 Hogsheads 2 Pipes 2 Pints (pt.) 8 Quarts 4 Pecks 8 Bushels 36 Bushels 1 Pint, pt. 1 Quart, qt. 1 Gallon, gal. = 1 Barrel, bbl. 1 Hogshead, hhd. 1 Pipe, P. 1 Tun, T. :231 cubic in. DRY MEASURE. TABLE. = 1 Quart, = 1 Peck, = 1 Bushel, = 1 Quarter, 1 Chaldron, qt. pk. bu. qr. ch. TROY OR MINT WEIGHT. TABLE. 24 Grains (gr.) 20 Peiiuywcigtits 12 Ounces = 1 Pennyweight, ^= 1 Ounce, *= 1 Pound, dwt. or pwt. oz. m. Tables of Weights and Measures. 171 AVOIRDUPOIS WEIGHT. TABLE. Grains = 1 Dram. dr. 16 Drams = 1 Ounce, oz. 16 Ounces 1 Pound, ft). 25 Pounds = 1 Quarter, qr. 4 Quarters or 100 pounds = 1 Hundredweight, cwt. 20 Hundredweight or 2000 pounds= 1 Ton, t. 480 Pounds = 1 Imperial Quarter. 100 Pounds is also called 1 Cental, c. The cwt. in England, and in some cases in the United States, is 112 pounds, or 4 quarters of 28 pounds. The ton English is 2240 pounds. Thi,s is called the long ton, and 2000 pounds, the short ton. APOTHECARIES' WEIGHT. TABLE. 20 Grains (gr.) = 1 Scruple, 3 Scruples = 1 Dram, 8 Drams = 1 Ounce, 12 Ounces = 1 Pound, MEDICAL DIVISIONS OF THE GALLON. TABLE. 60 Minims (m.) = 1 Fluidram, fz 8 Fluidrama = 1 Fluidounce, f!$ 16 Fluidounces = 1 Pint, 0. 8 Pints = 1 Gallon, Cong. 0. is an abbreviation of octans, the Latin for one-eighth ; Gong, for congiarium, the Latin for gallon. DIAMOND WEIGHT. TABLE. 16 Parts = 1 Grain. 4 Grains = 1 Carat. 1 Carat 3 Grain* Troy, nearly. 172 Arithmetical Exercises and Examples. ASSAYERS' WEIGHT. TABLE. 1 Carat = 10 Pwts. Troy. 1 Carat grain = 2 Pwts. 12 grains, or 60 grains Troy. 24 Carats == 1 Pound Troy. The term carat is also used to express the fineness of gold,- each carat meaning a twenty-fourth part. SHOEMAKERS' MEASURE. No. 1 small size is 4J inches, and every succeeding No. increases ^^f an inch to 13. No. 1 large size is 8JJ inches, and every succeeding No. in- creases J of an inch to 15. CIRCULAR MEASURE. TABLE. 60 Seconds " = 1 Minute, 60 Minutes = 1 Degree, 30 Degrees == 1 Sign, s. 12 Signs or 360 = 1 Circle, c. 90 degrees make 1 quadrant or right angle. 60 " " 1 sextant or sixth of a circle. 180 u " 1 semi-circle or half-circle. MISCELLANEOUS TABLES. BOOKS AND PAPER. SIZE OF PAPER. Inches. Demy 17 by 22 Medium 19 " 24 Double medium 24 " 38 Super-royal 21 " 27 Inches. Letter 10 by 15 Folio post 16 " 21 Foolscap 14 " 17 Crown 15 ' 20 Double Elephant 26 " 40 Imperial 22 " 32 A sheet (medium) folded in 2 leaves is called folio. " " 4 " u quarto or 4to. " 8 " " octavo or 8vo. " u u 12 " " duodecimo or 12 mo. Tables of Weights and Measures. 1 Ream. 1 Bale A sheet (medium) folded in 16 leaves is called 16mo. " 18 " " 18mo. a u 24 " " 24rao. < " 32 " 32mo. 1 Quire. = 20 Quires = 1 Bundle ; 5 Bundles = : 1 dozen. i 12 dozen = 1 gross. r 1 great gross. 1 score. - 1 firkin of butter. = 1 quintal of dried fish. - 1 barrel of flour. = 1 barrel of flour in California. 1 barrel of beef, pork, or fish. = 1 barrel of salt. 1 cask 'of raisins. 14 11). iron or lead = 1 stone. }'2 barrels of wheat = 7 English quarters. :u.l stone= 1 Pig; 8 pigs = 1 fother. 256 pounds of soap = 1 barrel. 25 pounds of powder = 1 keg. 18 Inches = 1 Cubit. 24 Sheets 480 Sheets 2 Reams 12 units 144 units 12 gross 20 units 56 It). 100 It). 106 11.. 200 tt). 200 Ib. 280 II). loo Ib. WEIGHT OK GRAIN AND PRODUCE PER BUSHEL, AS USBD IN NEW ORLEANS WIIBN THERE IS NO AGREEMENT TO T11K CONTRARY. Wheat, bu sh. 60 Ib. Flaxseed, bu sh. 56 Ib. Corn, < 56 " Hempseed, 44 " Rye, ">6 " Buckwheat, 52 " Oats, 32 " Castor Beans, 46 - li Barley, * 48 " Dried Peaches, 33 " Irish Potatoes, 4 60 " Dried Apples, 24 " Sweet Potatoes, ' (10 " Onions, 57 " Beans, ' 62 " Coarse Salt, 50 ' Bran, ' 24 u Fine Salt, 50 " Clover seed, ' 60 < ; Stone Coal, 80 " Timothy seed. ' 45 " Corn Meal, 44 li Barley Malt. ' 34 " Plastering Hair. 7 4< Peas, split. ' 60 M Blue Grass seed, 10 " Small Hominy, ' 50 u VB - 1 7433 M306O21 QA / 503 THE UNIVERSITY OF CALIFORNIA LIBRARY Soule's . College and Literary Institute, In wl /*/. jj, />/ Institute, For b f >///><' TwJthif/ SV//oo/, There are arious fields of educqfjpp ; its curriculum THIRTY-TWO BRANCHES OF STUr 5T, taught by the most improved, ogresr- meth Lectures are given on i.he various subjects studied, an., also on -IOLOGY, HYGIENE, PURE: OL- ETC. our stn GEO. SOUT-E, I* *0pt