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Math worksheet for practicing compatible numbers in addition and subtraction.

Worksheet titled "Compatible Numbers for Addition and Subtraction" with 15 math problems involving addition and subtraction using compatible numbers.

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1. 18 + 25 = 20 + 23 = 43
2. 36 + 42 = 40 + 38 = 78
3. 12 + 38 = 10 + 40 = 50
4. 31 + 23 + 18 = 30 + 20 + 20 = 70
5. 72 + 12 + 20 = 70 + 10 + 20 = 100
6. 74 - 21 = 73 - 20 = 53
7. 58 - 23 = 60 - 25 = 35
8. 92 - 81 = 90 - 80 = 10
9. 28 - 13 = 30 - 15 = 15
10. 48 - 19 = 50 - 20 = 30
11. 76 - 24 - 10 = 70 - 20 - 10 = 40
12. 91 - 21 - 30 = 90 - 20 - 30 = 40
13. 76 + 21 - 31 = 75 + 20 - 30 = 65
14. 14 + 36 - 12 = 10 + 40 - 10 = 40
15. 49 + 27 - 22 = 50 + 25 - 20 = 55

Parent Tip: Review the logic above to help your child master the concept of compatible numbers worksheet 3rd grade.

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