## 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 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 11 Lesson 15 loss marbles miles an hour miles per hour months one-half oranges paid 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 tenths terest to gain tons of coal trees TROY WEIGHT twelfths walk water weighs 1000 week weighs 1000 ounces worth

### Popular passages

Page 63 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq.

Page 67 - TIME 60 seconds (sec.) = 1 minute (min.) 60 minutes =1 hour (hr.) 24...

Page 56 - Dry Measure 2 pints (pt.) =1 quart (qt.) 8 quarts = 1 peck (pk.) 4 pecks = 1 bushel (bu.) 2150.42 cu.

Page 65 - 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 61 - LENGTH 12 inches (in.) = 1 foot (ft.) 3 feet = 1 yard (yd.) 5| yards = 1 rod (rd.) 320 rods = 1 mile (mi.) 1 mile = 1,760 yd.

Page 60 - TROY WEIGHT is used in weighing gold, silver, and precious stones. TABLE. 24 Grains (gr.) make 1 Pennyweight, dwt.

Page 66 - 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 43 - 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 68 - ... 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 58 - 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.