Addition With Regrouping Worksheets with Answer Key - Free Printable
Educational worksheet: Addition With Regrouping Worksheets with Answer Key. Download and print for classroom or home learning activities.
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Step-by-step solution for: Addition With Regrouping Worksheets with Answer Key
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Show Answer Key & Explanations
Step-by-step solution for: Addition With Regrouping Worksheets with Answer Key
Let's solve each of these addition problems with regrouping step by step. The goal is to add two 2-digit numbers, using the "regrouping boxes" method (also known as carrying over). We'll go through each problem one at a time.
---
```
3 5
+ 3 7
-----
```
- Add ones place: 5 + 7 = 12 → write 2, carry 1
- Add tens place: 3 + 3 + 1 (carry) = 7
✔ Answer: 72
---
```
6 1
+ 2 9
-----
```
- Ones: 1 + 9 = 10 → write 0, carry 1
- Tens: 6 + 2 + 1 = 9
✔ Answer: 90
---
```
7 5
+ 4 6
-----
```
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 7 + 4 + 1 = 12
✔ Answer: 121
---
```
3 8
+ 8 3
-----
```
- Ones: 8 + 3 = 11 → write 1, carry 1
- Tens: 3 + 8 + 1 = 12
✔ Answer: 121
---
```
4 9
+ 3 2
-----
```
- Ones: 9 + 2 = 11 → write 1, carry 1
- Tens: 4 + 3 + 1 = 8
✔ Answer: 81
---
```
6 4
+ 2 8
-----
```
- Ones: 4 + 8 = 12 → write 2, carry 1
- Tens: 6 + 2 + 1 = 9
✔ Answer: 92
---
```
5 5
+ 6 6
-----
```
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 5 + 6 + 1 = 12
✔ Answer: 121
---
```
7 9
+ 2 2
-----
```
- Ones: 9 + 2 = 11 → write 1, carry 1
- Tens: 7 + 2 + 1 = 10
✔ Answer: 101
---
```
9 1
+ 1 9
-----
```
- Ones: 1 + 9 = 10 → write 0, carry 1
- Tens: 9 + 1 + 1 = 11
✔ Answer: 110
---
```
2 5
+ 2 6
-----
```
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 2 + 2 + 1 = 5
✔ Answer: 51
---
```
4 4
+ 4 7
-----
```
- Ones: 4 + 7 = 11 → write 1, carry 1
- Tens: 4 + 4 + 1 = 9
✔ Answer: 91
---
```
5 9
+ 2 3
-----
```
- Ones: 9 + 3 = 12 → write 2, carry 1
- Tens: 5 + 2 + 1 = 8
✔ Answer: 82
---
```
1 6
+ 5 6
-----
```
- Ones: 6 + 6 = 12 → write 2, carry 1
- Tens: 1 + 5 + 1 = 7
✔ Answer: 72
---
```
1 8
+ 5 2
-----
```
- Ones: 8 + 2 = 10 → write 0, carry 1
- Tens: 1 + 5 + 1 = 7
✔ Answer: 70
---
```
8 4
+ 4 9
-----
```
- Ones: 4 + 9 = 13 → write 3, carry 1
- Tens: 8 + 4 + 1 = 13
✔ Answer: 133
---
```
1 3
+ 1 7
-----
```
- Ones: 3 + 7 = 10 → write 0, carry 1
- Tens: 1 + 1 + 1 = 3
✔ Answer: 30
---
## ✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 1. 35 + 37 | 72 |
| 2. 61 + 29 | 90 |
| 3. 75 + 46 | 121 |
| 4. 38 + 83 | 121 |
| 5. 49 + 32 | 81 |
| 6. 64 + 28 | 92 |
| 7. 55 + 66 | 121 |
| 8. 79 + 22 | 101 |
| 9. 91 + 19 | 110 |
|10. 25 + 26 | 51 |
|11. 44 + 47 | 91 |
|12. 59 + 23 | 82 |
|13. 16 + 56 | 72 |
|14. 18 + 52 | 70 |
|15. 84 + 49 | 133 |
|16. 13 + 17 | 30 |
---
In each box, you should:
1. Write the sum of the ones digits in the bottom right.
2. If it's ≥10, write only the ones digit and carry the tens digit to the top of the tens column.
3. Add the tens digits plus any carry, and write the result in the bottom left.
For example, in 35 + 37:
- Ones: 5 + 7 = 12 → write 2 in the bottom right, carry 1
- Tens: 3 + 3 + 1 = 7 → write 7 in the bottom left
- Final answer: 72
You can apply this pattern to all problems.
Let me know if you'd like a printable version or visual explanation!
---
🔢 Problem 1: 35 + 37
```
3 5
+ 3 7
-----
```
- Add ones place: 5 + 7 = 12 → write 2, carry 1
- Add tens place: 3 + 3 + 1 (carry) = 7
✔ Answer: 72
---
🔢 Problem 2: 61 + 29
```
6 1
+ 2 9
-----
```
- Ones: 1 + 9 = 10 → write 0, carry 1
- Tens: 6 + 2 + 1 = 9
✔ Answer: 90
---
🔢 Problem 3: 75 + 46
```
7 5
+ 4 6
-----
```
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 7 + 4 + 1 = 12
✔ Answer: 121
---
🔢 Problem 4: 38 + 83
```
3 8
+ 8 3
-----
```
- Ones: 8 + 3 = 11 → write 1, carry 1
- Tens: 3 + 8 + 1 = 12
✔ Answer: 121
---
🔢 Problem 5: 49 + 32
```
4 9
+ 3 2
-----
```
- Ones: 9 + 2 = 11 → write 1, carry 1
- Tens: 4 + 3 + 1 = 8
✔ Answer: 81
---
🔢 Problem 6: 64 + 28
```
6 4
+ 2 8
-----
```
- Ones: 4 + 8 = 12 → write 2, carry 1
- Tens: 6 + 2 + 1 = 9
✔ Answer: 92
---
🔢 Problem 7: 55 + 66
```
5 5
+ 6 6
-----
```
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 5 + 6 + 1 = 12
✔ Answer: 121
---
🔢 Problem 8: 79 + 22
```
7 9
+ 2 2
-----
```
- Ones: 9 + 2 = 11 → write 1, carry 1
- Tens: 7 + 2 + 1 = 10
✔ Answer: 101
---
🔢 Problem 9: 91 + 19
```
9 1
+ 1 9
-----
```
- Ones: 1 + 9 = 10 → write 0, carry 1
- Tens: 9 + 1 + 1 = 11
✔ Answer: 110
---
🔢 Problem 10: 25 + 26
```
2 5
+ 2 6
-----
```
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 2 + 2 + 1 = 5
✔ Answer: 51
---
🔢 Problem 11: 44 + 47
```
4 4
+ 4 7
-----
```
- Ones: 4 + 7 = 11 → write 1, carry 1
- Tens: 4 + 4 + 1 = 9
✔ Answer: 91
---
🔢 Problem 12: 59 + 23
```
5 9
+ 2 3
-----
```
- Ones: 9 + 3 = 12 → write 2, carry 1
- Tens: 5 + 2 + 1 = 8
✔ Answer: 82
---
🔢 Problem 13: 16 + 56
```
1 6
+ 5 6
-----
```
- Ones: 6 + 6 = 12 → write 2, carry 1
- Tens: 1 + 5 + 1 = 7
✔ Answer: 72
---
🔢 Problem 14: 18 + 52
```
1 8
+ 5 2
-----
```
- Ones: 8 + 2 = 10 → write 0, carry 1
- Tens: 1 + 5 + 1 = 7
✔ Answer: 70
---
🔢 Problem 15: 84 + 49
```
8 4
+ 4 9
-----
```
- Ones: 4 + 9 = 13 → write 3, carry 1
- Tens: 8 + 4 + 1 = 13
✔ Answer: 133
---
🔢 Problem 16: 13 + 17
```
1 3
+ 1 7
-----
```
- Ones: 3 + 7 = 10 → write 0, carry 1
- Tens: 1 + 1 + 1 = 3
✔ Answer: 30
---
## ✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 1. 35 + 37 | 72 |
| 2. 61 + 29 | 90 |
| 3. 75 + 46 | 121 |
| 4. 38 + 83 | 121 |
| 5. 49 + 32 | 81 |
| 6. 64 + 28 | 92 |
| 7. 55 + 66 | 121 |
| 8. 79 + 22 | 101 |
| 9. 91 + 19 | 110 |
|10. 25 + 26 | 51 |
|11. 44 + 47 | 91 |
|12. 59 + 23 | 82 |
|13. 16 + 56 | 72 |
|14. 18 + 52 | 70 |
|15. 84 + 49 | 133 |
|16. 13 + 17 | 30 |
---
📝 How to Fill in the Boxes:
In each box, you should:
1. Write the sum of the ones digits in the bottom right.
2. If it's ≥10, write only the ones digit and carry the tens digit to the top of the tens column.
3. Add the tens digits plus any carry, and write the result in the bottom left.
For example, in 35 + 37:
- Ones: 5 + 7 = 12 → write 2 in the bottom right, carry 1
- Tens: 3 + 3 + 1 = 7 → write 7 in the bottom left
- Final answer: 72
You can apply this pattern to all problems.
Let me know if you'd like a printable version or visual explanation!
Parent Tip: Review the logic above to help your child master the concept of addition box worksheet.
