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ver coin, $62620; artificial flowers and jewelry, $3126; molasses, $26959. What was their total value?

Ans. $213689.

44. The same articles were exported during the year 1848 to the following amounts, viz. vinegar, $13920; earthen and stone ware, $8512; glass manufactures, $76007; tin, $12353; pewter and lead, $7739; marble and stone, $22466; gold and silver, and gold-leaf, $6241; gold and silver coin, $2700412; artificial flowers and jewelry, $11217; molasses, $5563. Required their total value. Ans. $2864430.

45. The value of exports for the year 1847 of the following articles, was: of trunks, $5270; brick and lime, $17623; salt, $42333; lead, $124081; various manufactured articles, $1108984; other articles, $1199276; government stores to the army from New York, $326800. Required their total value. Ans. $2824367.

46. During the year 1848, the exports of the same articles, were of trunks, $6126; brick and lime, $24174; salt, $73274; lead, $84278; coal, $47112; ice, $75547; various manufactured articles, $1157828; other articles, $851383. Required their total value. Ans. $2299722.

47. Required the total value of exports for the year 1847. (Add together the answers of sums 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, and 45.) Ans. $150646564.

SUBTRACTION.

§ 46.-1. Subtraction consists in taking one number from another number so as to find the difference between them.

2. The subtraction of one number from another is expressed by a short horizontal line (-) placed between the two numbers, and implying that the number placed on the right is to be taken from the one on the left;-thus the subtraction of 6 from 13 is expressed as follows: 13-6=7.

46. What is subtraction? How is subtraction expressed? What does it imply?

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§ 49.-1. Mary had 5 books, and gave away 2. had she left?

many

2. James had 6 apples, and gave away 3. had he left?

3. Susan had 7 oranges, and gave away 4. had she left?

How

How many

How many

4. Robert had 9 pennies, and spent 6 of them. many had he left?

How

5. William had 11 cents, and gave 7 for a book. How many had he left?

6. John had 13 marbles, and lost 6 of them. How many had he left?

7. Robert picked 11 apples from a branch of an appletree containing 16 apples. How many did he leave?

8. James is 17 years old, and Samuel 8. How many years is James older than Samuel ?

9. A man bought a cow for 12 dollars, and sold her for 18. How many dollars did he gain?

10. A man having 17 sheep sold 7. How many had he left?

11. A boy having 21 cents spent 12. How many had he left?

12. Paid $17 for a coat, and $8 for a pair of pantaloons. How many more dollars did I pay for my coat than for my pantaloons?

13. A man bought 3 barrels of flour for $18, and sold one of them for $7. What did the two remaining barrels cost him?

24 less 12 are how many ? 18 less 9 are how many 19 less 7 are how many ? 17 less 8 are how many ? 16 less 4 are how many 13 less 8 are how many

14. 15 less 7 are how many? 15. 13 less 8 are how many? 16. 17 less 9 are how many? 17. 19 less 11 are how many? 18. 15 less 7 are how many ? 19. 21 less 9 are how many? 20. 22 less 11 are how many? 11 less 8 are how many? 21. 18 less 12 are how many? 20 less 11 are how many?

?

§ 50. In subtracting the following 10s, subtract the figure occupying the tens' place only, and write a cipher on the right of the result.

1. James having 40 cents, spent 20 cents. How many had he left?

EXPLANATION. 40=4 tens, and 20-2 tens; and 4 tens -2 tens 2 tens=20.

2. 30-10 are how many? 3. 50-30 are how many 4. 40-10 are how many ? 5. 70-40 are how many ? 6. 60-30 are how many ? 7. 80-50 are how many?

?

?

70-20 are how many
60-40 are how many?
90-50 are how many'
50-10 are how many?
70-60 are how many
y?
90-70 are how many?

If the larger of the two numbers consists of tens and units both, while the smaller consists of tens only, their difference is found by subtracting the tens of the smaller number from the tens of the larger number, and writing the units of the larger number on the right of the difference.

8. A man having 36 sheep, sold 20 of them. How many had he left?

EXPLANATION. 36=3 tens and 6 units, and 20 units=2 tens, and 2 tens from 3 tens=1 ten, and 1 ten and 6 units =16, Ans.

9. 46-20 are how many ? 10. 39-10 are how many? 11. 54–30 are how many? 12. 63-20 are how many ? 13. 76-50 are how many? 14. 85-60 are how many ? 15. 67-40 are how many?

?

19-10 are how many? 71-60 are how many 83-30 are how many ? 57-20 are how many ? 87-50 are how many? 49-10 are how many? 66-50 are how many?

When both numbers consist of units and tens, take units from units and tens from tens. If, however, the unit figure of the smaller number is greater than that of the larger number, take that unit figure from 10, and add the difference to the unit figure of the larger number; then diminish the 10s of the larger number by 1 more than the 10s of the smaller number.

50. What is the direction for subtracting tens? What is the rule for subtracting tens only from tens and units? What is the rule when both numbers consist of units and tens?

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