2nd Grade Addition and Subtraction Worksheets with Answer Key - Free Printable
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Step-by-step solution for: 2nd Grade Addition and Subtraction Worksheets with Answer Key
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Show Answer Key & Explanations
Step-by-step solution for: 2nd Grade Addition and Subtraction Worksheets with Answer Key
Here is the complete solution to all 30 addition and subtraction problems from the worksheet, with step-by-step explanations for each.
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Problem 1: 85 – 27
- Subtract ones: 5 – 7 → Can’t do, so borrow 1 from tens (8 becomes 7, 5 becomes 15)
- 15 – 7 = 8
- Subtract tens: 7 – 2 = 5
- Answer: 58
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Problem 2: 93 – 31
- Ones: 3 – 1 = 2
- Tens: 9 – 3 = 6
- Answer: 62
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Problem 3: 25 + 25
- Ones: 5 + 5 = 10 → write 0, carry 1
- Tens: 2 + 2 + 1 (carry) = 5
- Answer: 50
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Problem 4: 43 + 11
- Ones: 3 + 1 = 4
- Tens: 4 + 1 = 5
- Answer: 54
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Problem 5: 17 – 17
- Any number minus itself equals 0.
- Answer: 0
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Problem 6: 37 – 27
- Ones: 7 – 7 = 0
- Tens: 3 – 2 = 1
- Answer: 10
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Problem 7: 33 – 28
- Ones: 3 – 8 → borrow 1 (3 becomes 13, 3 becomes 2)
- 13 – 8 = 5
- Tens: 2 – 2 = 0
- Answer: 5
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Problem 8: 61 + 14
- Ones: 1 + 4 = 5
- Tens: 6 + 1 = 7
- Answer: 75
---
Problem 9: 52 + 33
- Ones: 2 + 3 = 5
- Tens: 5 + 3 = 8
- Answer: 85
---
Problem 10: 44 – 33
- Ones: 4 – 3 = 1
- Tens: 4 – 3 = 1
- Answer: 11
---
Problem 11: 54 + 23
- Ones: 4 + 3 = 7
- Tens: 5 + 2 = 7
- Answer: 77
---
Problem 12: 64 – 21
- Ones: 4 – 1 = 3
- Tens: 6 – 2 = 4
- Answer: 43
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Problem 13: 97 – 39
- Ones: 7 – 9 → borrow 1 (9 becomes 8, 7 becomes 17)
- 17 – 9 = 8
- Tens: 8 – 3 = 5
- Answer: 58
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Problem 14: 76 + 26
- Ones: 6 + 6 = 12 → write 2, carry 1
- Tens: 7 + 2 + 1 = 10 → write 0, carry 1 to hundreds
- Hundreds: 1
- Answer: 102
---
Problem 15: 84 – 16
- Ones: 4 – 6 → borrow 1 (8 becomes 7, 4 becomes 14)
- 14 – 6 = 8
- Tens: 7 – 1 = 6
- Answer: 68
---
Problem 16: 88 – 12
- Ones: 8 – 2 = 6
- Tens: 8 – 1 = 7
- Answer: 76
---
Problem 17: 45 – 32
- Ones: 5 – 2 = 3
- Tens: 4 – 3 = 1
- Answer: 13
---
Problem 18: 40 – 39
- Ones: 0 – 9 → borrow 1 (4 becomes 3, 0 becomes 10)
- 10 – 9 = 1
- Tens: 3 – 3 = 0
- Answer: 1
---
Problem 19: 39 + 74
- Ones: 9 + 4 = 13 → write 3, carry 1
- Tens: 3 + 7 + 1 = 11 → write 1, carry 1 to hundreds
- Hundreds: 1
- Answer: 113
---
Problem 20: 55 + 66
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 5 + 6 + 1 = 12 → write 2, carry 1 to hundreds
- Hundreds: 1
- Answer: 121
---
Problem 21: 47 – 18
- Ones: 7 – 8 → borrow 1 (4 becomes 3, 7 becomes 17)
- 17 – 8 = 9
- Tens: 3 – 1 = 2
- Answer: 29
---
Problem 22: 58 + 63
- Ones: 8 + 3 = 11 → write 1, carry 1
- Tens: 5 + 6 + 1 = 12 → write 2, carry 1 to hundreds
- Hundreds: 1
- Answer: 121
---
Problem 23: 62 – 38
- Ones: 2 – 8 → borrow 1 (6 becomes 5, 2 becomes 12)
- 12 – 8 = 4
- Tens: 5 – 3 = 2
- Answer: 24
---
Problem 24: 28 – 19
- Ones: 8 – 9 → borrow 1 (2 becomes 1, 8 becomes 18)
- 18 – 9 = 9
- Tens: 1 – 1 = 0
- Answer: 9
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Problem 25: 98 + 87
- Ones: 8 + 7 = 15 → write 5, carry 1
- Tens: 9 + 8 + 1 = 18 → write 8, carry 1 to hundreds
- Hundreds: 1
- Answer: 185
---
Problem 26: 41 – 16
- Ones: 1 – 6 → borrow 1 (4 becomes 3, 1 becomes 11)
- 11 – 6 = 5
- Tens: 3 – 1 = 2
- Answer: 25
---
Problem 27: 53 – 11
- Ones: 3 – 1 = 2
- Tens: 5 – 1 = 4
- Answer: 42
---
Problem 28: 95 – 71
- Ones: 5 – 1 = 4
- Tens: 9 – 7 = 2
- Answer: 24
---
Problem 29: 44 – 13
- Ones: 4 – 3 = 1
- Tens: 4 – 1 = 3
- Answer: 31
---
Problem 30: 33 – 19
- Ones: 3 – 9 → borrow 1 (3 becomes 2, 3 becomes 13)
- 13 – 9 = 4
- Tens: 2 – 1 = 1
- Answer: 14
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✔ Final Answer Key:
1. 58
2. 62
3. 50
4. 54
5. 0
6. 10
7. 5
8. 75
9. 85
10. 11
11. 77
12. 43
13. 58
14. 102
15. 68
16. 76
17. 13
18. 1
19. 113
20. 121
21. 29
22. 121
23. 24
24. 9
25. 185
26. 25
27. 42
28. 24
29. 31
30. 14
You can now fill in the answers on your worksheet! Let me know if you’d like a printable version or explanation of any specific problem.
---
Problem 1: 85 – 27
- Subtract ones: 5 – 7 → Can’t do, so borrow 1 from tens (8 becomes 7, 5 becomes 15)
- 15 – 7 = 8
- Subtract tens: 7 – 2 = 5
- Answer: 58
---
Problem 2: 93 – 31
- Ones: 3 – 1 = 2
- Tens: 9 – 3 = 6
- Answer: 62
---
Problem 3: 25 + 25
- Ones: 5 + 5 = 10 → write 0, carry 1
- Tens: 2 + 2 + 1 (carry) = 5
- Answer: 50
---
Problem 4: 43 + 11
- Ones: 3 + 1 = 4
- Tens: 4 + 1 = 5
- Answer: 54
---
Problem 5: 17 – 17
- Any number minus itself equals 0.
- Answer: 0
---
Problem 6: 37 – 27
- Ones: 7 – 7 = 0
- Tens: 3 – 2 = 1
- Answer: 10
---
Problem 7: 33 – 28
- Ones: 3 – 8 → borrow 1 (3 becomes 13, 3 becomes 2)
- 13 – 8 = 5
- Tens: 2 – 2 = 0
- Answer: 5
---
Problem 8: 61 + 14
- Ones: 1 + 4 = 5
- Tens: 6 + 1 = 7
- Answer: 75
---
Problem 9: 52 + 33
- Ones: 2 + 3 = 5
- Tens: 5 + 3 = 8
- Answer: 85
---
Problem 10: 44 – 33
- Ones: 4 – 3 = 1
- Tens: 4 – 3 = 1
- Answer: 11
---
Problem 11: 54 + 23
- Ones: 4 + 3 = 7
- Tens: 5 + 2 = 7
- Answer: 77
---
Problem 12: 64 – 21
- Ones: 4 – 1 = 3
- Tens: 6 – 2 = 4
- Answer: 43
---
Problem 13: 97 – 39
- Ones: 7 – 9 → borrow 1 (9 becomes 8, 7 becomes 17)
- 17 – 9 = 8
- Tens: 8 – 3 = 5
- Answer: 58
---
Problem 14: 76 + 26
- Ones: 6 + 6 = 12 → write 2, carry 1
- Tens: 7 + 2 + 1 = 10 → write 0, carry 1 to hundreds
- Hundreds: 1
- Answer: 102
---
Problem 15: 84 – 16
- Ones: 4 – 6 → borrow 1 (8 becomes 7, 4 becomes 14)
- 14 – 6 = 8
- Tens: 7 – 1 = 6
- Answer: 68
---
Problem 16: 88 – 12
- Ones: 8 – 2 = 6
- Tens: 8 – 1 = 7
- Answer: 76
---
Problem 17: 45 – 32
- Ones: 5 – 2 = 3
- Tens: 4 – 3 = 1
- Answer: 13
---
Problem 18: 40 – 39
- Ones: 0 – 9 → borrow 1 (4 becomes 3, 0 becomes 10)
- 10 – 9 = 1
- Tens: 3 – 3 = 0
- Answer: 1
---
Problem 19: 39 + 74
- Ones: 9 + 4 = 13 → write 3, carry 1
- Tens: 3 + 7 + 1 = 11 → write 1, carry 1 to hundreds
- Hundreds: 1
- Answer: 113
---
Problem 20: 55 + 66
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 5 + 6 + 1 = 12 → write 2, carry 1 to hundreds
- Hundreds: 1
- Answer: 121
---
Problem 21: 47 – 18
- Ones: 7 – 8 → borrow 1 (4 becomes 3, 7 becomes 17)
- 17 – 8 = 9
- Tens: 3 – 1 = 2
- Answer: 29
---
Problem 22: 58 + 63
- Ones: 8 + 3 = 11 → write 1, carry 1
- Tens: 5 + 6 + 1 = 12 → write 2, carry 1 to hundreds
- Hundreds: 1
- Answer: 121
---
Problem 23: 62 – 38
- Ones: 2 – 8 → borrow 1 (6 becomes 5, 2 becomes 12)
- 12 – 8 = 4
- Tens: 5 – 3 = 2
- Answer: 24
---
Problem 24: 28 – 19
- Ones: 8 – 9 → borrow 1 (2 becomes 1, 8 becomes 18)
- 18 – 9 = 9
- Tens: 1 – 1 = 0
- Answer: 9
---
Problem 25: 98 + 87
- Ones: 8 + 7 = 15 → write 5, carry 1
- Tens: 9 + 8 + 1 = 18 → write 8, carry 1 to hundreds
- Hundreds: 1
- Answer: 185
---
Problem 26: 41 – 16
- Ones: 1 – 6 → borrow 1 (4 becomes 3, 1 becomes 11)
- 11 – 6 = 5
- Tens: 3 – 1 = 2
- Answer: 25
---
Problem 27: 53 – 11
- Ones: 3 – 1 = 2
- Tens: 5 – 1 = 4
- Answer: 42
---
Problem 28: 95 – 71
- Ones: 5 – 1 = 4
- Tens: 9 – 7 = 2
- Answer: 24
---
Problem 29: 44 – 13
- Ones: 4 – 3 = 1
- Tens: 4 – 1 = 3
- Answer: 31
---
Problem 30: 33 – 19
- Ones: 3 – 9 → borrow 1 (3 becomes 2, 3 becomes 13)
- 13 – 9 = 4
- Tens: 2 – 1 = 1
- Answer: 14
---
✔ Final Answer Key:
1. 58
2. 62
3. 50
4. 54
5. 0
6. 10
7. 5
8. 75
9. 85
10. 11
11. 77
12. 43
13. 58
14. 102
15. 68
16. 76
17. 13
18. 1
19. 113
20. 121
21. 29
22. 121
23. 24
24. 9
25. 185
26. 25
27. 42
28. 24
29. 31
30. 14
You can now fill in the answers on your worksheet! Let me know if you’d like a printable version or explanation of any specific problem.
Parent Tip: Review the logic above to help your child master the concept of math subtraction worksheet 2nd grade.
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