Let's solve each of the two-digit subtraction problems on your worksheet. We'll go through them one by one, showing whether regrouping (borrowing) is needed and how to solve each problem step by step.
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Problem 1: 45 - 39
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Step 1: Subtract the ones place: 5 - 9 → can't do this without regrouping.
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Regroup: Borrow 1 from the tens place (4 becomes 3), so 5 becomes 15.
- Now: 15 - 9 = 6
- Tens place: 3 - 3 = 0
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Answer: 6
✔ With regrouping
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Problem 2: 47 - 32
- Ones place: 7 - 2 = 5
- Tens place: 4 - 3 = 1
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Answer: 15
✔ Without regrouping
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Problem 3: 75 - 15
- Ones: 5 - 5 = 0
- Tens: 7 - 1 = 6
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Answer: 60
✔ Without regrouping
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Problem 4: 58 - 46
- Ones: 8 - 6 = 2
- Tens: 5 - 4 = 1
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Answer: 12
✔ Without regrouping
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Problem 5: 72 - 54
- Ones: 2 - 4 → need regrouping
- Borrow 1 from tens: 7 becomes 6, 2 becomes 12
- 12 - 4 = 8
- Tens: 6 - 5 = 1
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Answer: 18
✔ With regrouping
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Problem 6: 64 - 37
- Ones: 4 - 7 → need regrouping
- Borrow 1: 6 becomes 5, 4 becomes 14
- 14 - 7 = 7
- Tens: 5 - 3 = 2
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Answer: 27
✔ With regrouping
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Problem 7: 66 - 41
- Ones: 6 - 1 = 5
- Tens: 6 - 4 = 2
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Answer: 25
✔ Without regrouping
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Problem 8: 83 - 46
- Ones: 3 - 6 → need regrouping
- Borrow: 8 becomes 7, 3 becomes 13
- 13 - 6 = 7
- Tens: 7 - 4 = 3
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Answer: 37
✔ With regrouping
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Problem 9: 37 - 14
- Ones: 7 - 4 = 3
- Tens: 3 - 1 = 2
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Answer: 23
✔ Without regrouping
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Problem 10: 37 - 28
- Ones: 7 - 8 → need regrouping
- Borrow: 3 becomes 2, 7 becomes 17
- 17 - 8 = 9
- Tens: 2 - 2 = 0
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Answer: 9
✔ With regrouping
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Problem 11: 51 - 39
- Ones: 1 - 9 → need regrouping
- Borrow: 5 becomes 4, 1 becomes 11
- 11 - 9 = 2
- Tens: 4 - 3 = 1
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Answer: 12
✔ With regrouping
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Problem 12: 59 - 23
- Ones: 9 - 3 = 6
- Tens: 5 - 2 = 3
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Answer: 36
✔ Without regrouping
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✔ Final Answers:
| Problem | Answer | Regrouping? |
|--------|--------|-------------|
| 1 | 6 | Yes |
| 2 | 15 | No |
| 3 | 60 | No |
| 4 | 12 | No |
| 5 | 18 | Yes |
| 6 | 27 | Yes |
| 7 | 25 | No |
| 8 | 37 | Yes |
| 9 | 23 | No |
| 10 | 9 | Yes |
| 11 | 12 | Yes |
| 12 | 36 | No |
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🔍 Summary:
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Problems with regrouping: 1, 5, 6, 8, 10, 11
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Problems without regrouping: 2, 3, 4, 7, 9, 12
You can now fill in the answers and circle or mark the ones that require regrouping as instructed.
Let me know if you'd like a printable version or help explaining any specific problem!
Parent Tip: Review the logic above to help your child master the concept of 2 digit subtraction worksheets with regrouping.
