Let's solve each of the
2-digit addition problems with regrouping on this worksheet step by step. We'll use
base-ten knowledge and
addition strategies, focusing on adding ones first, then tens, and carrying over (regrouping) when necessary.
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🔢 How to Solve:
1. Add the
ones column first.
2. If the sum is
10 or more,
regroup (carry over 1 to the tens).
3. Then add the
tens column, including any carried-over 1.
4. Write the final answer in the correct place value.
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Let’s go through each problem:
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####
1. 57 + 28
- Ones: 7 + 8 = 15 → write
5, carry
1
- Tens: 5 + 2 + 1 = 8
-
✔ Answer: 85
---
####
2. 43 + 78
- Ones: 3 + 8 = 11 → write
1, carry
1
- Tens: 4 + 7 + 1 = 12
-
✔ Answer: 121
---
####
3. 25 + 89
- Ones: 5 + 9 = 14 → write
4, carry
1
- Tens: 2 + 8 + 1 = 11
-
✔ Answer: 114
---
####
4. 26 + 24
- Ones: 6 + 4 = 10 → write
0, carry
1
- Tens: 2 + 2 + 1 = 5
-
✔ Answer: 50
---
####
5. 99 + 18
- Ones: 9 + 8 = 17 → write
7, carry
1
- Tens: 9 + 1 + 1 = 11
-
✔ Answer: 117
---
####
6. 55 + 36
- Ones: 5 + 6 = 11 → write
1, carry
1
- Tens: 5 + 3 + 1 = 9
-
✔ Answer: 91
---
####
7. 46 + 54
- Ones: 6 + 4 = 10 → write
0, carry
1
- Tens: 4 + 5 + 1 = 10
-
✔ Answer: 100
---
####
8. 47 + 64
- Ones: 7 + 4 = 11 → write
1, carry
1
- Tens: 4 + 6 + 1 = 11
-
✔ Answer: 111
---
####
9. 36 + 28
- Ones: 6 + 8 = 14 → write
4, carry
1
- Tens: 3 + 2 + 1 = 6
-
✔ Answer: 64
---
####
10. 17 + 56
- Ones: 7 + 6 = 13 → write
3, carry
1
- Tens: 1 + 5 + 1 = 7
-
✔ Answer: 73
---
####
11. 45 + 39
- Ones: 5 + 9 = 14 → write
4, carry
1
- Tens: 4 + 3 + 1 = 8
-
✔ Answer: 84
---
####
12. 25 + 18
- Ones: 5 + 8 = 13 → write
3, carry
1
- Tens: 2 + 1 + 1 = 4
-
✔ Answer: 43
---
####
13. 34 + 68
- Ones: 4 + 8 = 12 → write
2, carry
1
- Tens: 3 + 6 + 1 = 10
-
✔ Answer: 102
---
####
14. 29 + 23
- Ones: 9 + 3 = 12 → write
2, carry
1
- Tens: 2 + 2 + 1 = 5
-
✔ Answer: 52
---
####
15. 18 + 26
- Ones: 8 + 6 = 14 → write
4, carry
1
- Tens: 1 + 2 + 1 = 4
-
✔ Answer: 44
---
####
16. 49 + 66
- Ones: 9 + 6 = 15 → write
5, carry
1
- Tens: 4 + 6 + 1 = 11
-
✔ Answer: 115
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✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 1. 57 + 28 |
85 |
| 2. 43 + 78 |
121 |
| 3. 25 + 89 |
114 |
| 4. 26 + 24 |
50 |
| 5. 99 + 18 |
117 |
| 6. 55 + 36 |
91 |
| 7. 46 + 54 |
100 |
| 8. 47 + 64 |
111 |
| 9. 36 + 28 |
64 |
|10. 17 + 56 |
73 |
|11. 45 + 39 |
84 |
|12. 25 + 18 |
43 |
|13. 34 + 68 |
102 |
|14. 29 + 23 |
52 |
|15. 18 + 26 |
44 |
|16. 49 + 66 |
115 |
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📌 Tips for Students:
- Always start from the
right (ones).
-
Regroup when the ones total is
10 or more.
- Remember:
10 ones = 1 ten.
- Use
drawing base-ten blocks (like rods and units) if needed to visualize.
Let me know if you'd like a printable version or visual model! 😊
Parent Tip: Review the logic above to help your child master the concept of addition worksheet regrouping 2.
