A Mental Arithmetic |
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12 cents 25 cents 50 cents 9 dollars acres annum apples barrels of flour bill blackberries bought boy receive bushel cake cent must $100 cents a dozen cents a pound cents a quart cents a yard containing cords of wood costs $1 cows cubic feet cubic foot earn eggs eighths feet long feet wide foot of water fraction Frank pick gallons gave half-dollars horse improper fraction inches investment Lesson 18 marbles miles an hour miles per hour months one-half oranges paid par value peaches pears peck pennyweight pint postage stamps pounds of sugar profit quarts of berries quotient rate per cent rectangle remainder schooner sell share sheep sixths specific gravity spend square feet square rods temperature terest to gain tons of coal trees TROY WEIGHT twelfths walk water weighs 1000 week weighs 1000 ounces worth
Popular passages
Page 61 - 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. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq.
Page 54 - Dry Measure 2 pints (pt.) =1 quart (qt.) 8 quarts = 1 peck (pk.) 4 pecks = 1 bushel (bu.) 2150.42 cu.
Page 63 - CUBIC MEASURE 1728 cubic inches (cu. in.) = 1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Page 64 - We express the length- breadth, and thickness in units of the same denomination ; then we multiply the number of units in the length by the number of units in the breadth...
Page 182 - If 4 firkins of butter cost 26 dollars, what will 7 firkins cost ? 15. If 3 men can do a piece of work in 7 days, how long will it take 1 man to do it? How long would it take 4 men ? 16.
Page 58 - TROY WEIGHT is used in weighing gold, silver, and precious stones. TABLE. 24 Grains (gr.) make 1 Pennyweight, dwt.
Page 41 - At 8 cents a pound, how many pounds of sugar can be bought for 48 cents ? For 50 cents ? For 58 cents ? For 62 cents ? For 64 cents ? 29.
Page 110 - If 2 men start from the same place and travel in opposite directions, one at the rate of 4 miles an hour, and the other at the rate of 5 miles an hour, how far apart will they be at the end of 1 hour ? At the end of 2 hours ? 5 hours?
Page 66 - ... 291. MAGNITUDES WHICH ARE INVERSELY PROPORTIONAL TO OTHER MAGNITUDES OR TO THE SQUARES OF OTHER MAGNITUDES. EXAMPLE. If 5 men do a piece of work in 16 days, how long will it take 8 men to do a similar piece of work ? OPERATION AND EXPLANATION. It is evident that the time required will be inversely proportional to the number of men employed ; that is, if twice as many men are employed, not twice as much, but $ as much time will be required.
Page 56 - What will five barrels of flour cost, at six dollars a barrel ? 25. If a man can travel four miles in an hour, how far can he travel in eight hours 1 26. If it take four bushels of wheat to make a barrel of flour, how many bushels will it take to make seven barrels ? B.