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10. How many are 10 less 8? 11 less 8? 12 less 8?

11. A merchant had 13 barrels of salt, and sold 8 of them. How many barrels remained unsold ?

12. 14-8=? 15-8=? 16 -8=?
13. How many are 17 trunks less 8 trunks?

14. Form the subtraction tables of sevens and eights.

TABLES.

7-750 12-7=5 8-7=1 13-T=6 9-7=2 11-7=7 10-7=3 15-7=8 11-7=4 16—7=9

8-8=013-8=5 9—8=1 14-8=6 10-8=215-8=7 11-8=3 16—8=8 12-8=4 17-8=9

LESSON XXVI.

1. There were 12 musk-rats in traps, but 2 escaped. How many were there left in the traps ?

2. Helen had 6 violets, and Jennie had 16. How many more had Jennie than Helen ?

3. What number added to 6 makes 16?
4. 5+ 8 + 2-5=? 7+3+4—7=?

5. Henry gave his sister 12 figs. She gave 3 to Sarah and 5 to Flora. How many had she left? 12-(3+5)=? 6. 12 are how many more than 5?

7. 16 are how many more than 9? 8. What number added to 8 makes 16 ? 9. What number added to 5 makes 13? 10. Edgar having 14 plums, exchanged 5 of them for an orange.

How many had he left? 11. How many are 14 less 8? 13 less 7?

12. Henry caught 7 pigeons at one time, 3 at another, and then sold 4 of them. How many had he left? 7 +3—4=?

13. Frank earned 13 dollars and George earned 6. How many dollars more did Frank earn than George?

14. There were 11 trunks on a baggage-wagon, 7 of which the baggage-man left at the depot. How many were left in the wagon?

15. Out of 15 vases which were in a basket 6 were broken. How many were uninjured ?

16. Mr. Jones planted 17 shade-trees, but 5 of them died. How many lived ?

17. In a class of 19 all but 6 were promoted. How many were promoted ?

18. There were 14 persons on board a ship that was wrecked, of whom 8 were saved. were lost?

19. 16 +?=18. 18-?-12. 13+?=19.

How many

SLATE EXERCISES.
Copy, subtract, and add the following:

9 7 8 6 7 5 8
3

4 2 4 2 3

1 coco

I co v

7 1

LESSON XXVII.

1. Robert's father gave him 10 doves, but 9 of them died because they were not properly cared for. How many of them lived ?

2. Eva solved 11 examples, 9 of which were correct. How many were wrong?

3. A painter bought 12 gallons of oil, and used 9 gallons. How many gallons had he left?

4. A grocer bought 13 casks of vinegar, and sold 9 casks. How many casks had he left?

5. How many are 14 less 9? How many are 15 less 9? 15—9=? 15—?=9.

6. From a group of 16 boys 9 ran away. How many were left ? 16—9=? 16—?=9. 7. 9 from 17 leave how many ?

17—9=? 8. How many are 18 less 9? 18—9=?

9. A merchant bought 11 chests of tea, and sold all but 1 of them. How many did he sell? 11 — 10=? 11—?=10.

10. A boy had 12 steel-pens, and gave away 10 of them. How many had he left?

11. A man bought 13 tons of hay, and, after feeding 10 tons to his horses, sold the rest. How many tons did he sell ? 13-10=? 14-10=?

12. 15 — 10=? 16 - 10=? 17-10=? 13. 18-10=? 18-?=10. 10+?=18.

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14. A merchant bought 18 whips, and sold all but 8. How many did he sell? 18-8=?

15. How many are 19 stoves less 10 stoves ? 16. Form the subtraction tables of nines and tens.

TABLES.

9-9=0 14-955 10-9=1 15-9=6 11—9—2 16-95-7 12-9=3 17—9=8 13—9=4 18—9=9

10.-10=( 15-10=5 11 — 10 = 1 16—10=6 12-10--2 17 — 10=7 13—10=3 18-10=8 14–10=4 19-10=9

LESSON XXVIII.

1. Begin with 1 and count to 11 by 2's.
2. Begin at 11 and count back to 1 by 2’s.
3. Count 15 by 3's. Count 16 by 4's.
4. Count back from 15 to 0 by 3's.
5. Count back from 20 to 0 by 5’s.

6. Henry had fifteen dollars. He gave 2 dollars for a hat, 3 dollars for a vest, and 6 dollars for a coat. How much had he left?

7. What number added to 3 makes 10?
8. What number added to 9 makes 17 ?

9. A harness-maker having 19 harnesses, sold all but 9. How many did he sell? 19—?=9.

10. How many are 2 + 2? 2+12? 3+2? 3 +12? 4+ 2? 4+12? 5 + 2? 5+12?

11. How many are 3-3? 3 + 13? 4+52 4 + 15? 5+ 6? 5+16? 7+62 7+ 16?

12. How many are 3+62 3+16? 4+6? 4 + 16 ? 5+ 8?

5+8? 5+18? 5+9? 5+19? 13. How many are 3+ 5? 3+15?

3 + 15? 4+ 5? 4 +15? 8+6? 8+16? 8+7? 8+17?

14. In the barn were 12 horses, but 5 of them were taken out. How many remained ?

15. 10 chestnuts from 16 chestnuts leave how many chestnuts ? 16 — 10 = ?

16. A grocer bought 19 brooms. He sold 3 at one time, 5 at another, and 4 at another. How many had he left? 19-3+5+4=?

17. A lady purchased 4 dollars' worth of silk, 3 dollars' worth of velvet, 7 dollars' worth of lace, and 1 dollar's worth of linen. She gave in payment 20 dollars. How much should be returned to her?

SLATE EXERCISES.

Copy and add the following: 4 5

3

2 4 5

3 2 4

5 3 2

6 6 6

1 1 1

Copy and subtract the following:

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

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