Inverse Operations Practice

Name: _______________________________
Date: _______________________________

Instructions: Use the inverse relationship between addition and subtraction to find the missing numbers. Remember: if 5 + 3 = 8, then 8 - 3 = 5!

Part A: Find the missing number using addition and subtraction

1. 7 + 4 = 11, so 11 - 4 = __________

2. 6 + 9 = 15, so 15 - 9 = __________

3. 12 + 5 = 17, so 17 - 5 = __________

4. 8 + 6 = 14, so 14 - 6 = __________

5. 9 + 7 = 16, so 16 - 7 = __________

6. 13 - 8 = 5, so 5 + 8 = __________

7. 18 - 9 = 9, so 9 + 9 = __________

8. 14 - 7 = 7, so 7 + 7 = __________

9. 20 - 12 = 8, so 8 + 12 = __________

10. 15 - 6 = 9, so 9 + 6 = __________

Part B: Use inverse operations to find the missing number

11. _____ + 5 = 12

12. _____ + 8 = 15

13. 9 + _____ = 17

14. 6 + _____ = 14

15. _____ + 11 = 20

16. 18 - _____ = 10

17. 13 - _____ = 7

18. _____ - 9 = 6

19. _____ - 4 = 11

20. 16 - _____ = 8

Part C: Challenge! Solve these problems

21. If 7 + _____ = 19, what is the missing number? __________

22. If _____ - 8 = 9, what is the missing number? __________

23. If 14 + _____ = 23, what is the missing number? __________

24. If _____ - 12 = 13, what is the missing number? __________