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LESSON XXIX.

How many

1. A man having 18 butter-tubs, sold 3 at one time, 5 at another, and 6 at another.

tubs had he left?
2. In a

room there are 14 flowerpots. There are 4 in one window, 5 in another, and the rest are in the third window. How many are there in the third window ?

3. On the first vine there are 12 bunches of grapes, on another there are 3 bunches, and on another 4 bunches. How many bunches more are there on the first vine than on the other two? 12—(3+4)=?

4. How many are 7 and 5 less 3? 7 +5—3=?

5. There are 13 boys playing ball, and 5 playing marbles. How many more are there playing ball than there are playing marbles ? 13-5=-?

6. What is meant by the term addition? What is meant by the term subtraction?

7. Julia is 9 years old, and her sister is 5 years older. What is the age of her sister?

8. Charles is 6 years old, and James is 17 years old. How much older than Charles is James ?

9. What number added to 7 will make 15? 10. What number added to 5 will make 12?

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11. Begin with 2 and count to 17 by 3's. 12. Count from 19 back to 1 by 3's.

13. What number subtracted from 18 will leave 10? 18-?=10. 18-10=?

14. What number subtracted from 16 will leave 9? 16-?=9. 16—9=?

15. In a school of 18 pupils all but 3 study geography. How many study geography ?

16. James attended school 17 weeks, but Henry attended only 8 weeks? How many weeks did James attend more than Henry? 17—8=?

17. Julius had written all but 5 lines on a page of his writing-book. If the book had 19 lines on a page, how many had he written ?

18. How many are 3+3+2+2-4+5-2+7? 19. How many are 5+7+1—3—2+5—9+8? 20. How many are 6+4+5—3—6—2+8+9? 21. How many are 8—3+2—3+6+2-6+2? 22. How many are 6+8—7—2+5+6+1-4?

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REVIEW EXERCISES.

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Find the value of each of the following:

8 -- 2 9 — 3 8 - 4 9 — 6 6 2 7 -- 5 8 3 7 - 5 6 3 8 7 4 1 9 4 7 2 9 2 8 3 6 -- 6 6 1 8 - 2 6 4 7 3 7 2 5

6 4 8 3 9 – 7 8 5 9 4 8 1 6 5 7 — 3 12 4 15 6 13 6 14 9 16 — 6 15 6 17 9 12 8 11 4 15 7 13 4 10 5 14 9 13 9 11 8 18 9 17 8 10 8 11 8 16 9 15 6 13 –7 15 -- 6 12 -- 7 14 5

Find the value of the following, without using slate:

3 + 2 - 4 4+6---5 6+3 -- 2 5 + 6-8 4-3 + 6 4 + 2 6 + 5 8 5 + 6 9 5 + 8 - 7 6 + 9 5 9 5 + 2 6 + 7 - 6 4+7 - 3 5 + 6 9 8 + 7 - 9 6 - 3+ 4 8 + 5 3 9 -- 6 2 9 8 + 6 8 3 4 9-6 + 5 9 + 5 6 8 + 2 - 6 9 3 + 2

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REVIEW EXERCISES.

Copy and find the value of the following:

6+3—4+2 - 6 7-3+8-6 + 2
5-3+7-2-6 8-3 +6-5-4
5 +9—8-3 + 2 7—5+4+2-8
9-3+2-6 + 4 9-3-4+6+ 2
5+6+3 -3 -9 9-3 +6-3-8
8 +3—7—4+2 5+2-3 + 6-4
9-3 +64 + 8 8-3 + 7 + 2-6
9—4 +3+2—6 9-4+3+2-8
5 + 2-3 +4-8 2 +63 +7-5
9—3+4—3 + 2 6-3+4–6 + 2
4+2-3 +6-4 7-3+2-6+4

When an example has several numbers inclosed in a parenthesis, find the value of those within the parenthesis first, and then of this result, and the rest of the numbers.

Thus, 4+6-(3+2—4)=4+6--1; for (3+2 —4)=1.

Copy and find the value of the following:

5+8 -- (3+6-2) 6+8—(7—2 + 6) 6 +3+ (4-3 + 2) 7+3 -- (5+2-6) 5+4-(6+2-5) 9 — 2 +(6—4+2) 5--4-(8+2--9) 8 +6 --(2 +3— 1) 6+8—(3+4-2) 8-4+ (8—6+4) 9-3 + (2 +6—4) 9 +8—(8-3+2) 9 +6-(3-2+7) 9-7-(8--6-2) 8--3+(2+6-3) 9 +2–(7--4-2) 6 + 5 --(6-[ 8-3]) 2+6—(3—[1-3])

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1. How many quails are there in each group?
2. Express ten on your slates.

3. How many quails are there in two of the groups ?

4. How many are 1 ten and 1 ten ?

5. Express 2 tens, or twenty: 20. What does the 2 represent? What does the O show ?

6. Express 2 tens and 1, or twenty-one: 21.
7. Express 2 tens and 2 ones, or twenty-two.

8. Express twenty-three, twenty-four, twenty-five, twenty-six, twenty-seven, twenty-eight, twenty-nine.

9. Read the numbers you have written. 10. How many quails are there in the 3 groups ?

11. Express 3 tens, or thirty: 30. What does the figure 3 represent? What does the O show?

12. Express 3 tens and 1, or thirty-one. 3 tens and 2 ones, or thirty-two.

13. Express all the numbers from thirty-two to thirty-nine.

14. Express 4 tens, or forty. Express 4 tens and 1, or forty-one.

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