Addition and Inverse Operations
Practice addition and understanding inverse operations with this third-grade math worksheet.
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Addition and Inverse Operations
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Read each question carefully and answer to the best of your ability. Remember that addition and subtraction are inverse operations!
1. If 15 + 7 = 22, then 22 - 7 = .
2. The inverse operation of addition is .
3. To check an addition problem, you can use .
4. If you have 35 apples and you add 12 more, you will have apples in total.
5. Solve: 43 + 28 = ?
6. Use subtraction to check your answer for question 5.
7. Solve: 70 - 19 = ?
8. Use addition to check your answer for question 7.
9. Which of the following is an inverse operation for 65 + 15 = 80?
80 + 15 = 95
80 - 15 = 65
65 - 15 = 50
15 + 80 = 95
10. If you know that 20 + 30 = 50, what other math fact do you automatically know?
50 + 20 = 70
50 - 20 = 30
20 - 30 = -10
30 * 20 = 600
11. Addition and subtraction are related operations.
True
False
12. The equation 10 + 5 = 15 can be checked by 15 + 5 = 20.
True
False
13. Sarah had 25 stickers. She bought 18 more. How many stickers does Sarah have now?
14. Using an inverse operation, how would you check your answer for question 13?
15. Use the number line to show 5 + 3 = 8. Start at 5, then draw an arrow to show adding 3.