# Practical arithmetic for the use of adults

C.H. Law, 1848 - 120 СЕКъДЕР
0 йЯИТИЙщР
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### пЕЯИЕВЭЛЕМА

 NUMERATION AND NOTATION 1 INTEGERS Simple Addition 12 Subtraction 14 Multiplication 20 Division 27 FRACTIONS Reduction 40 Addition 52 Subtraction 54
 Subtraction 73 Multiplication 77 Division 81 REDUCTION 86 PROGRESSION AND PROPORTION 91 PRACTICE 107 DECIMALS 112 Reduction 113

 Multiplication 55 Division 57 COMPOUND ARITHMETIC 59 Addition 60
 Addition 115 Multiplication 116 DUODECIMALS 117

### дГЛОЖИКч АПОСПэСЛАТА

сЕКъДА 8 - SQUARE MEASURE 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet — 1 square yard (sq. yd.) 30^ square yards = 1 square rod (sq.
сЕКъДА 7 - AVOIRDUPOIS WEIGHT. 16 drams (dr.) make 1 ounce, marked oz. 16 ounces 1 pound Ib. 28 pounds 1 quarter qr. 4 quarters 1 hundred weight cwt. 20 hundred weight 1 ton T.
сЕКъДА 10 - TIME 60 seconds (sec.) = 1 minute (min.) 60 minutes = 1 hour (hr.) 24 hours = 1 day (da.) 7 days = 1 week (wk.) 365 days = 1 common year...
сЕКъДА 10 - January 31, February 28, March 31, April 30, May 31, June 30, July 31, August 31, September 30, October 31, November 30, December 31.
сЕКъДА 49 - Dividing the numerator and denominator of a fraction by the same number does not alter the value of the fraction.
сЕКъДА 56 - Reduce compound fractions to simple ones, and mixt numbers to improper fractions ; then multiply the numerators together for a new numerator, and the denominators for. a new denominator.
сЕКъДА 9 - MEASURE. 1728 cubic inches make 1 cubic foot. 27 cubic feet " 1 cubic yard. 40 cubic feet of round or 50 > „ . cubic feet of hewn timber \$ 128 cubic feet
сЕКъДА 7 - TROY WEIGHT. 24 grains (gr.) make 1 penny-weight, marked dwt. 20 penny-weights 1 ounce oz. 12 ounces 1 pound Ib. By this weight are weighed gold, silver, jewels, corn, bread, and liquors. 13. If an ingot of silver weigh 42 oz. 13 dwt., what is it worth at 4 cents per dwt.
сЕКъДА 103 - When, in order to find a fourth proportional, several circumstances require to be considered, it is called Compound Proportion. If 14 horses eat 56 bushels of oats in 16 days ; how many bushels will be required for 20 horses for 24 days?
сЕКъДА 9 - Measure. 4 gills make 1 pint 2 pints 1 quart 4 quarts 1 gallon 10 gallons 1 anker of brandy 42 gallons 1 tierce 63 gallons...