3+2+1+6

2+4+2+3

2+6+8+4

4+8+2+4 2+6+1+7 4+2+3+9 8+1+7+4 8+4+2+5 4+7+4+3 6+4+2+7 5+2+7+6 7+2+9+1 5+6+4+3 9+2+6+3 4+2+6+5 4+9+2+4 5+2+7+6 5+2+4+3 7+4+6+1 914+2

8+2+6+3 9+14+5 4+2+6+7 5+2+7+4 5+9+2+3 8+7+2+2 4+3+5+8 4+7+6+2 6+2+3+5 5+4+9+2 9+2+3+6 4+7+2+6 5+1+4+9 6+3+1+8 4+7+5+4 7+3+3+7 6+4+4+6 8+2+2+7 9+1+6+3 8+5+2+4 7+7+2+3

1. Make two marks on your slates. Erase one. How many marks are there left?

2. 1 mark from 2 marks leaves how many marks? 3. If there were 3 pencils on the table, and Helen took 1 away, how many were left?

4. How many are 3 pencils less 1 pencil?

5. If 4 apples were put in a box, and afterward 1 was taken out, how many remained?

6. How many are 4 apples less 1 apple?

7. Hold up 5 fingers. Put one down. How

many fingers are you holding up?

8. How many are 5 fingers less 1 finger?

9. Make 6 dots on your slates.

many are there left?

Erase one.

How

10. How many are 6 dots less 1 dot?

11. How many steamships are represented in the picture?

12. If 1 sails away, how many are left?

13. How many vessels are 7 vessels less 1 vessel? 14. How many boats do you see in the picture?

15. How many are being rowed away? How many are left?

16. How many boats are 8 boats less 1 boat?

17. If there are 9 trees, and a man cuts 1 down, how many will be left?

18. How many trees are 9 trees less 1 tree?

LESSON XX.

1. A rose-bush had 3 roses on it, but 1 dropped off. How many roses were there left on the bush? 2. How many are 3 less 2?

The sign

takes the place of the word less. It is read minus. Thus, 4 less 2 equals 2, is written 4-2-2, and is read 4 minus 2 equals 2?

7. If you take 2 apples from a group of 6 apples, how many apples will be left ?

8. How many apples are 6 apples less 2 apples? 9. Express 6 less 2 equals 4. 6-2=4.

10. William had 7 pennies, and gave 2 for a pencil. How many had he left? 7-2=?

11. How many slates are 8 slates less 2 slates? 12. How many are 9 less 2? How many are 10 less 2? How many are 11 less 2?

13. How many are 12 dollars less 2 dollars?

Taking one number from another is called Subtraction.

14. Form the subtraction tables of ones and twos.

1. Helen had 3 cents, and gave them for a pencil. How many cents had she left? 3. -3=?

2. A man had 4 horses, and sold 3 of them. How many had he left? 4-3=?

3. How many cows are 5 cows less 3 cows?

4. A boy had 6 marbles, and gave away 3. How many marbles had he left? 6—3=?

5. How many dollars are 7 dollars less 3 dollars? How many are 8 less 3?

6. A woman had 9 dollars, and gave 3 for a hat. How many dollars had she left?

7. How many horses are 10 horses less 3 horses? How many are 11 minus 3?

8. If there were 12 pigeons on a limb, and 3 flew away, how many remained? 12-3=?

9. If James had 4 apples, and gave away 4, how many had he left? 4-4=?

10. If Emily had 5 cents, and gave 4 cents for paper, how many cents had she left?

11. How many are 6 less 4? 7 minus 4 are how many?

12. How many are 8 less 4? 9 minus 4 are how many?

13. How many are 10 books less 4 books? 11 hats less 4 hats?

14. How many are 12 minus 4? 13 less 4 are how many?

15. Form the subtraction tables of threes and fours.