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? 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. 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? How many 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? REVIEW EXERCISES. 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 3 6 - 6 6 1 8 2 6 4 7 - 3 7 2 5 2 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 11 8 18 - 9 17 8 10 8 - 8 16 9 15 - 6 137 15 - 6 12 - 7 14 - 5 11 Find the value of the following, without using slate: 3+2 - 4 4 + 6 - 5 6+3 - 2 5+6 - 8 4-3 + 6 9 - 4-t 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 7 --- 2 + 5 8 3 + 4 6+3 - 8 7+ 5-9 REVIEW EXERCISES. Copy and find the value of the following: 6+3—4+246 7—3+8—6.+ 2 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—[4—3]) 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. 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. |