Let's solve each of the addition problems on the worksheet step by step, using
addition with regrouping (also known as carrying). We'll go through each problem one at a time.
---
1. 33 + 49
```
33
+ 49
----
```
- Add ones: 3 + 9 = 12 → write down 2, carry over 1
- Add tens: 3 + 4 = 7, plus carry-over 1 = 8
- Result:
82
---
2. 45 + 36
```
45
+ 36
----
```
- Ones: 5 + 6 = 11 → write 1, carry 1
- Tens: 4 + 3 = 7, plus 1 = 8
- Result:
81
---
3. 74 + 16
```
74
+ 16
----
```
- Ones: 4 + 6 = 10 → write 0, carry 1
- Tens: 7 + 1 = 8, plus 1 = 9
- Result:
90
---
4. 55 + 38
```
55
+ 38
----
```
- Ones: 5 + 8 = 13 → write 3, carry 1
- Tens: 5 + 3 = 8, plus 1 = 9
- Result:
93
---
5. 53 + 37
```
53
+ 37
----
```
- Ones: 3 + 7 = 10 → write 0, carry 1
- Tens: 5 + 3 = 8, plus 1 = 9
- Result:
90
---
6. 27 + 67
```
27
+ 67
----
```
- Ones: 7 + 7 = 14 → write 4, carry 1
- Tens: 2 + 6 = 8, plus 1 = 9
- Result:
94
---
7. 88 + 6
```
88
+ 6
----
```
- Ones: 8 + 6 = 14 → write 4, carry 1
- Tens: 8 + 0 = 8, plus 1 = 9
- Result:
94
---
8. 48 + 39
```
48
+ 39
----
```
- Ones: 8 + 9 = 17 → write 7, carry 1
- Tens: 4 + 3 = 7, plus 1 = 8
- Result:
87
---
9. 66 + 29
```
66
+ 29
----
```
- Ones: 6 + 9 = 15 → write 5, carry 1
- Tens: 6 + 2 = 8, plus 1 = 9
- Result:
95
---
10. 28 + 58
```
28
+ 58
----
```
- Ones: 8 + 8 = 16 → write 6, carry 1
- Tens: 2 + 5 = 7, plus 1 = 8
- Result:
86
---
11. 77 + 19
```
77
+ 19
----
```
- Ones: 7 + 9 = 16 → write 6, carry 1
- Tens: 7 + 1 = 8, plus 1 = 9
- Result:
96
---
12. 67 + 18
```
67
+ 18
----
```
- Ones: 7 + 8 = 15 → write 5, carry 1
- Tens: 6 + 1 = 7, plus 1 = 8
- Result:
85
---
13. 46 + 49
```
46
+ 49
----
```
- Ones: 6 + 9 = 15 → write 5, carry 1
- Tens: 4 + 4 = 8, plus 1 = 9
- Result:
95
---
14. 57 + 34
```
57
+ 34
----
```
- Ones: 7 + 4 = 11 → write 1, carry 1
- Tens: 5 + 3 = 8, plus 1 = 9
- Result:
91
---
15. 65 + 29
```
65
+ 29
----
```
- Ones: 5 + 9 = 14 → write 4, carry 1
- Tens: 6 + 2 = 8, plus 1 = 9
- Result:
94
---
16. 69 + 29
```
69
+ 29
----
```
- Ones: 9 + 9 = 18 → write 8, carry 1
- Tens: 6 + 2 = 8, plus 1 = 9
- Result:
98
---
✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 33 + 49 |
82 |
| 45 + 36 |
81 |
| 74 + 16 |
90 |
| 55 + 38 |
93 |
| 53 + 37 |
90 |
| 27 + 67 |
94 |
| 88 + 6 |
94 |
| 48 + 39 |
87 |
| 66 + 29 |
95 |
| 28 + 58 |
86 |
| 77 + 19 |
96 |
| 67 + 18 |
85 |
| 46 + 49 |
95 |
| 57 + 34 |
91 |
| 65 + 29 |
94 |
| 69 + 29 |
98 |
---
🔍 Key Concept: Regrouping (Carrying)
When adding two-digit numbers:
- Start from the
ones place.
- If the sum is
10 or more, write the
ones digit and
carry over the tens digit to the tens column.
- Then add the tens digits
including any carry-over.
This method helps students understand place value and how numbers are built.
Let me know if you'd like this formatted for printing or need help explaining it to a child!
Parent Tip: Review the logic above to help your child master the concept of free worksheet addition with regrouping.
