Εικόνες σελίδας
PDF
Ηλεκτρ. έκδοση

16. Suppose a cistern has a cock which conveys 37 gallons into it in an half hour, how much would run into it in 1 d. 8 h.

17. If a man can earn 18 dollars in a calendar month, how much would he earn in 7 y. 8 mo.

?

18. In one year how many minutes?

19. In two y. 3 mo. 18 d. how many days?/

20. A cannon ball at its first discharge, flies at the rate of about 9 miles in a minute; how far would it fly at that rate in 24 hours? How far in 15 days?

[blocks in formation]

42. What would 17 loads of hay come to at 26 dollars a load?

Note. First find the price of 16 loads, and then add the price of 1 load. Perform the following examples in a similar

manner.

43. What would 17 oxen cost, at 87 dollars apiece?

44. What would 87 pounds of tobacco cost, at 23 cents a pound?

45. What would 28 pounds of sugar cost, at 13 cents a pound?

46. What would 59 bushels of potatoes cost, at 38 cents a bushel ?

47. What costs 1 hhd. of molasses at 37 cents a gallon?

[blocks in formation]

V. 1. What cost 5 pounds of beef at 10 cents a pound? 2. What will 12 barrels of flour come to, at 10 dollars a barrel ?

Note. Observe that when you multiply by 10, it is done by annexing a zero to the right of the number; and by 100, it is done by annexing two zeros, &c.; and find the reason why.

3. What would a hogshead of wine come to, at ten cents a pint ?

4. If 10 men can do a piece of work in 7 days, how many days will it take 1 man to do it?

5. What would an ox, weighing 873 pounds, come to, at 10 cents a pound?

6. If 100 men were to receive 8 dollars apiece, how many dollars would they all receive?

7. If 27 men were to receive 100 dollars apiece, how many dollars would they all receive?

[blocks in formation]

8. In 3 dimes how many cents?

9. In 5 dollars how many dimes? How many cents?

10. In 17 dollars how many cents?

11. In 83 cents how many mills?
12. In 753 dols. how many cents?
13. In 1 dol. how many mills?
14. In 84 dols. how many mills?

15. In 7 dols. and 53 cents, how many cents?

16. In 183 dols. and 14 cents, how many cents?

17. In 283 dols. 43 cents and 8 mills, how many mills? 18. In 8246 dols. 2 d. 5 c. 6 m. how many mills?

It is usual to write dollars and cents in the following manner 43 dols. 5. d. 7 c. and 4 mills, is written $43.574. The character $ written before shows that it is federal money. The figures at the left of the point (.) are so many dollars, the first figure at the right of the point is so many dimes, the next so many cents, and the third so many mills.

It may be observed that when dollars stand alone, they are changed to dimes by annexing one zero to the right, because that multiplies them by 10. They are changed to cents, by annexing two zeros, because that multiplies them

by 100. They are changed to mills by annexing three zeros, because that multiplies them by 1,000. Thus 43 dollars are 430 dimes, 4,300 cents, or 43,000 mills. 5 dimes are 50 cents, or 500 mills. 7 cents are 70 mills. The above example then may be read 43 dols. 57 cents and 4 mills; or 435 dimes, 7 cents, and 4 mills; or 4,357 cents and 4 mills; or 43,574 mills. When there are dollars, dimes, and cents, the figures on the left of the point may be read dollars, and those on the right, cents; or they may be all read together as cents. When the number of cents exceeds 100, they are changed to dollars by putting a point between the second and third figures from the right. If there are mills in the number, all the figures may be read together as mills. Any number of mills are changed to dollars by putting a point between the third and fourth figure from the right; the figures at the left will be dollars, and those at the right, dimes, cents, and mills. Since any sum which has cents or mills in it, may be considered as so many cents or mills, it is evident that any operation, as addition, multiplication, &c. may be performed upon it in the same manner as upon simple numbers.

If the sum consists of dollars and a number of cents less than ten, there must be a zero between the dollars and the cents in the place of dimes. Thus 7 dols. and 5 cents must be written $7.05.

19. What will 10 yards of cloth cost at $4.53 a yard ? 20. What will 10 pounds of coffee cost at $0.27 a pound? 21. What will 100-sheep cost at $8.45 apiece?

22. What will 1,000 yards of cloth cost at $0.35 a yard?

[blocks in formation]

VI. 1. What cost 75 lb. of tobacco at 20 cents a pound?

2. What cost 30 cords of wood at $6,75 a cord?

3. If 400 men receive 135 dollars apiece, how many dollars will they all receive?

4. If 30 men can do a piece of work in 43 days, how many days will it take 1 man to do it?

5. If 70 men can do a piece of work in 83 days, how many men will it take to do it in one day?

6. If the pendulum of a clock swing once in a second how many times will it swing in an hour? How many times in a day? How many times in a week?

7. How many seconds are there in 10 min. 23 sec. ? 8. How many minutes are there in 7 h. 23 min. ? 9. How many minutes are there in 3d. 7 h. 43 min. ? 10. How many seconds are there in 8 d. 7 h. 3-4 min 19 sec. ?

11. A garrison of 3,000 men are to be paid, and each man is to receive 128 dollars. How many dollars will they all receive?

12. What cost 30 barrels of cider at $3.50 a barrel ?

13. There are 320 rods in a mile, how many rods are there in 7 miles? How many in 10 miles? How many in 30 miles? How many in 500 miles?

[blocks in formation]

VII. 1. What will 17 oxen come to at 42 dollars apiece? Note. Find the price of 10 oxen and of 7 oxen separately, and then add them together.

2. What will 34 barrels of flour come to, at $6.43 a barrel ?

Note. Find the price of 30 barrels and of 4 barrels separately, and then add them together.

3. What cost 19 gallons of wine, at $1.28 a gallon? 4. What cost 68 yards of cloth, at $9.36 a yard?

5. What will 87 thousand of boards come to, at $5.50 a thousand?

6. What will 58 barrels of beef come to, at $9.75 a barrel? 7. What will 87 gallons of brandy come to, at $1.60 a gallon?

8. A and B depart from the same place and travel in opposite directions, A at the rate of 38 miles in a day, and B at the rate of 42 miles a day. How far apart will they be at the end of the first day? How far at the end of 15 days?

by 100. They are changed to mills by annexing three zeros, because that multiplies them by 1,000. Thus 43 dollars are 430 dimes, 4,300 cents, or 43,000 mills. 5 dimes are 50 cents, or 500 mills. 7 cents are 70 mills. The above example then may be read 43 dols. 57 cents and 4 mills; or 435 dimes, 7 cents, and 4 mills; or 4,357 cents and 4 mills; or 43,574 mills. When there are dollars, dimes, and cents, the figures on the left of the point may be read dollars, and those on the right, cents; or they may be all read together as cents. When the number of cents exceeds 100, they are changed to dollars by putting a point between the second and third figures from the right. If there are mills in the number, all the figures may be read together as mills. Any number of mills are changed to dollars by putting a point between the third and fourth figure from the right; the figures at the left will be dollars, and those at the right, dimes, cents, and mills. Since any sum which has cents or mills in it, may be considered as so many cents or mills, it is evident that any operation, as addition, multiplication, &c. may be performed upon it in the same manner as upon simple numbers.

If the sum consists of dollars and a number of cents less than ten, there must be a zero between the dollars and the cents in the place of dimes. Thus 7 dols. and 5 cents must be written $7.05.

19. What will 10 yards of cloth cost at $4.53 a yard ? 20. What will 10 pounds of coffee cost at $0.27 a pound? 21. What will 100-sheep cost at $8.45 apiece?

22. What will 1,000 yards of cloth cost at $0.35 a yard?

[blocks in formation]

VI. 1. What cost 75 lb. of tobacco at 20 cents a pound?

2. What cost 30 cords of wood at $6,75 a cord?

3. If 400 men receive 135 dollars apiece, how many dollars will they all receive?

« ΠροηγούμενηΣυνέχεια »