Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση
[blocks in formation]

to

pounds.*

to

pounds.*

9. A load of hay weighs from

10. A load of coal weighs from

11. When hay is $12 a ton, 1000 lb. cost 12. When coal is $8 a ton, 1500 lb. cost 13. When meal is $16 a ton, 500 lb. cost 14. When hay is $6 a ton, 200 lb. cost 15. When hay is $7 a ton, 200 lb. cost 16. When hay is $5 a ton, 200 lb. cost 17. When hay is $8 a ton, 200 lb. cost 18. When hay is $6 a ton, 2200 lb. cost 19. When hay is $8 a ton, 2200 lb. cost 20. When hay is $5 a ton, 2200 lb. cost

[blocks in formation]

25. When hay is $12 a ton, 2500 lb. cost

26. When hay is $10 a ton, 3000 lb. cost

27. When hay is $8 a ton, 4500 lb. cost

*When you see a load of hay or a load of coal, courteously ask the man in charge of it to tell you how much it weighs.

[merged small][graphic][merged small][merged small][merged small][merged small]

9. The area of a 2-inch square is 10. The solid content of a 2-inch cube is 11. The area of a 3-inch square is

inches.

inches.

12. The solid content of a 3-inch cube is

13. The area of a 2-foot square is
14. The solid content of a 2-foot cube is
15. Find the area of-

feet.

Find the solid content of--*

[blocks in formation]
[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][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][ocr errors][merged small][ocr errors][merged small][merged small]

17. Eight is

earn

of 12. A man can as much in 8 days as he can earn in 12 days. can earn $21 in 12 days, in 8 days he can earn

18. Fifteen is

earn

and

If he

dollars.

times 6. A man can

times as much in 15 days as he can earn in 6 days. If he can earn $10 in 6 days, in 15 days he can

[blocks in formation]

(a) If a man can earn $104 in 6 weeks, how much can he earn in 15 weeks.

*It may be well, after the pupil has solved "mentally " such problems as Nos. 5 and 6, to require him to solve them with a pencil-this, as a preparation for similar problems in which larger numbers are used.

Allow the pupil to say, "15 is 3 halves of 10," but remind him that the expression "3 halves of 10," means, 3 times 1 half of 10.

[blocks in formation]

14. Henry had 25 cents; he spent 20 per cent of his money; he spent

cents.

15. Peter spent 10 cents; this was 25 per cent of all he earned; he earned

cents.

16. Roscoe earned 60 cents and spent 30 cents; he spent per cent of what he earned.

*TO THE TEACHER.-Frequently review this page, and give many similar oral problems as a preparation for page 27.

†These figures designate the percentage cases to which the problems below them belong.

[blocks in formation]

(m) 652 is 331% of what? (n) 6521 is 331% of what?

[blocks in formation]

11. One per cent (1%) of a number is 1 hundredth of

the number; 2% is 2 hundredths; 3% is 3 hundredths.

12. One per cent of 500 is

2% of 500 is

13. One per cent of 600 is

3% of 600 is

« ΠροηγούμενηΣυνέχεια »