Let's solve each of the 2-digit addition problems with regrouping on this worksheet. I'll go through each problem step by step, showing how to add the numbers and handle any regrouping (carrying over) needed.
---
Problem 1:
```
27
40
+ 13
-----
```
- Add ones place: 7 + 0 + 3 = 10 → write down 0, carry over 1
- Add tens place: 2 + 4 + 1 (carry) = 7
-
Answer: 80
---
Problem 2:
```
22
40
+ 18
-----
```
- Ones: 2 + 0 + 8 = 10 → write 0, carry 1
- Tens: 2 + 4 + 1 = 7
-
Answer: 80
---
Problem 3:
```
11
19
+ 42
-----
```
- Ones: 1 + 9 + 2 = 12 → write 2, carry 1
- Tens: 1 + 1 + 4 + 1 = 7
-
Answer: 72
---
Problem 4:
```
55
28
+ 13
-----
```
- Ones: 5 + 8 + 3 = 16 → write 6, carry 1
- Tens: 5 + 2 + 1 + 1 = 9
-
Answer: 96
---
Problem 5:
```
62
15
+ 18
-----
```
- Ones: 2 + 5 + 8 = 15 → write 5, carry 1
- Tens: 6 + 1 + 1 + 1 = 9
-
Answer: 95
---
Problem 6:
```
48
13
+ 11
-----
```
- Ones: 8 + 3 + 1 = 12 → write 2, carry 1
- Tens: 4 + 1 + 1 + 1 = 7
-
Answer: 72
---
Problem 7:
```
16
26
+ 10
-----
```
- Ones: 6 + 6 + 0 = 12 → write 2, carry 1
- Tens: 1 + 2 + 1 + 1 = 5
-
Answer: 52
---
Problem 8:
```
70
19
+ 12
-----
```
- Ones: 0 + 9 + 2 = 11 → write 1, carry 1
- Tens: 7 + 1 + 1 + 1 = 10
-
Answer: 101
---
Problem 9:
```
45
33
+ 18
-----
```
- Ones: 5 + 3 + 8 = 16 → write 6, carry 1
- Tens: 4 + 3 + 1 + 1 = 9
-
Answer: 96
---
Problem 10:
```
13
65
+ 14
-----
```
- Ones: 3 + 5 + 4 = 12 → write 2, carry 1
- Tens: 1 + 6 + 1 + 1 = 9
-
Answer: 92
---
Problem 11:
```
22
45
+ 23
-----
```
- Ones: 2 + 5 + 3 = 10 → write 0, carry 1
- Tens: 2 + 4 + 2 + 1 = 9
-
Answer: 90
---
Problem 12:
```
46
22
+ 14
-----
```
- Ones: 6 + 2 + 4 = 12 → write 2, carry 1
- Tens: 4 + 2 + 1 + 1 = 8
-
Answer: 82
---
Problem 13:
```
52
33
+ 17
-----
```
- Ones: 2 + 3 + 7 = 12 → write 2, carry 1
- Tens: 5 + 3 + 1 + 1 = 10
-
Answer: 102
---
Problem 14:
```
37
40
+ 16
-----
```
- Ones: 7 + 0 + 6 = 13 → write 3, carry 1
- Tens: 3 + 4 + 1 + 1 = 9
-
Answer: 93
---
Problem 15:
```
29
10
+ 33
-----
```
- Ones: 9 + 0 + 3 = 12 → write 2, carry 1
- Tens: 2 + 1 + 3 + 1 = 7
-
Answer: 72
---
✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 1 | 80 |
| 2 | 80 |
| 3 | 72 |
| 4 | 96 |
| 5 | 95 |
| 6 | 72 |
| 7 | 52 |
| 8 | 101 |
| 9 | 96 |
| 10 | 92 |
| 11 | 90 |
| 12 | 82 |
| 13 | 102 |
| 14 | 93 |
| 15 | 72 |
---
🔍 Explanation:
-
Regrouping (or carrying) is used when the sum of digits in a column is 10 or more.
- We add the
ones first. If the total is 10 or more, we write the
ones digit and carry the
tens digit to the next column.
- Then we add the
tens, including any carried-over amount.
- This method ensures accurate two-digit addition.
Let me know if you'd like a printable version or a visual explanation! 🎸✨
Parent Tip: Review the logic above to help your child master the concept of second grade math worksheet addition and subtraction.
