Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση

Denominate Numbers-Weight.

349. The standard unit of weight in common use is a pound Avoirdupois.

[blocks in formation]

The abbreviation for 1 hundredweight (100 lb) is cwt.

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small]

1. Of 2650 lb. coal at $5.50 per ton. 2. Of 2650 lb. oats at 24¢ a bushel.

3. Of 3330 lb. wheat at 80¢ a bushel.

4. Of 4650 lb. potatoes at 42¢ a bushel.

(a) Find the sum of the four results.

*This means the amount of ear corn required to make bushel of shelled

corn.

[blocks in formation]

1. Of 2560 lb. hay at $7.50 per ton.
2. Of 1430 lb. straw at 30¢ per cwt.

3. Of 2 tons meal at of a cent a pound.
4. Of 1 tons corn husks at 14 cents a pound.
5. Of 3420 lb. hay at $8.00 per ton.

(a) Find the sum of the five results.

Find the cost

6. Of 2140 lb. oats at 24¢ a bushel.
7. Of 2140 lb. corn at 28¢ a bushel.
8. Of 2140 lb. wheat at 90¢ a bushel.
9. Of 2140 lb. barley at 36¢ a bushel.
10. Of 2140 lb. rye at 42¢ a bushel.

(b) Find the sum of the five results.

Find the cost

11. Of 520 lb. clover seed at $6.30 a bushe..
12. Of 520 lb. potatoes at 75¢ a bushel.
13. Of 520 lb. beans at $2.15 a bushel.
14. Of 520 lb. corn at 20¢ a bushel.
15. Of 520 lb. ear corn at 35¢ a bushei.
(c) Find the sum of the five results.

Find the approximate weight

16. Of a barrel of kerosene.

17. Of 1 quart of milk.

18. Of the oats that will fill a bin that is 4 ft. by 4 ft by 9 ft.

19. Of the water that will fill a tank that is 2 ft. by 2 ft. by 12 ft.

20. Of a five-gallon can of kerosene.

Denominate Numbers-Weight.

350. Troy weight is used in weighing gold, silver, and

[blocks in formation]

351. Apothecaries' weight is used in mixing medicines and in selling them at retail.

[merged small][merged small][merged small][ocr errors][merged small]

NOTE 1.—The pound Troy and the pound Apothecary are equal, each weighing 5760 grains. The pound Avoirdupois weighs 7000 Troy or Apothecary grains.

NOTE 2.-The ounce Troy and the ounce Apothecary are each 480 grains; the ounce Avoirdupois is 4371⁄2 grains.

QUERY.-Which is heavier, a pound of feathers or a pound of gold? An ounce of feathers or an ounce of gold?

PROBLEMS

1. Change 5 lb. Avoirdupois weight to pounds, ounces, etc., Apothecaries' weight.

2. How many 5 gr. powders can be made from one Avoirdupois ounce of quinine?

3. One Avoirdupois ton of gold is how many Troy pounds? 4. Twenty-four Troy pounds equal how many Avoirdupois pounds?

[merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

"So teach us to number our days that we may apply our hearts unts wisdom."

SHORT METHODS

IN

MULTIPLICATION AND

DIVISION.

Art. 1. To multiply a number by 50: Multiply of the number by 100. Why?

[blocks in formation]
[blocks in formation]

Art. 2. To multiply a number by 51: number, to which add the number itself.

50 times 48 = 2400

[blocks in formation]
[blocks in formation]

(b) Find the sum of the twelve products.

« ΠροηγούμενηΣυνέχεια »