Don't Subtract - Add.

Teaching Addition, Subtraction, and Place Value, Book 5, Page 34

Don’t Subtract - Add!

WALT: I am learning that problems like 34 + ------ = 51 and  51 - 34 = ------ have the same answer.

Success Criteria: I am able to solve addition and Subtraction problems by using the strategy of adding and not subtracting.

A.

Question	Answer	Question	Answer
1. 23 + .....-=60	37	6. 38 + .....=52	14
2. 54 + .....=70	16	7. 67 + .....=76	9
3. 16 + .....=30	14	8. 18 + .....=82	64
4. 27 + .....=72	45	9. 56 + ......=88	32
5. 76 + .....=85	9	10. 18+ .....=42	24

B. Materials

Question	Addition and answer	Question	Addition and answer
1. 50 - 47 =	47 + 3 = 50	6. 33 - 26 =	26 + 7 = 33
2. 63 - 59 =	59 + 4 = 63	7. 23 - 18 =	18 + 5 = 23
3. 80 - 78 =	78 + 2 = 80	8. 81 - 18 =	18 + 63 = 81
4. 83 - 77 =	77 + 6 = 83	9. 75 - 39 =	39 + 36 = 75
5. 63 - 57 =	57 + 6 = 63	10. 103 - 88 =	88 + 5 = 103

C. Imaging

Question	Answer	Question	Answer
1. 86 - 69 =	17	7. 74 - 56 =	18
2. 45 - 37 =	11	8. 47 - 27 =	20
3. 14 - 8 =	6	9. 83 - 67 =	16
4. 50- 29 =	21	10. 65 - 39 =	26
5. 90 - 57 =	13	11. 91 - 18 =	87
6. 55 - 29 =	26	12. 53 - 47 =	6

D. Word Problems - Number Properties

1. Karl had 38 lollies and he ate 9. How many lollies did he have

left?                         38 - 9 = 29

2. Fusi had 75 marbles but lost 13. How many did she have left?

                                         75 - 13 = 62

3. Moses has 130 biscuits and he ate 27. How many did he have

left?                        130 - 27  =113

4. Levi G had 67 toy cars. He gave 19 toy cars to Jayden. How

many did he have left? 67 - 19 = 49

5. Anthony had $53. He spent $17. How many dollars did he

have left?              $53 - $17 = 36

6. Levi R had 74 oranges and he ate 27. How many did have

left?                          74 - 27 = 47

7. Jahsiah had 42 tennis balls. He lost 18. How many were left?

                                          42 - 18 = 24