Here is the solution to all the two-digit addition problems on the worksheet, along with a clear explanation for each.
---
How to Solve Two-Digit Addition (Column Method)
When adding two-digit numbers, we add the digits in each column separately — starting from the
rightmost column (ones place), then moving to the
left column (tens place).
- If the sum of the ones column is 10 or more, you
carry over the extra ten to the tens column.
- Then add the tens column (including any carry-over).
---
##
✔ Solutions:
---
Row 1
1. 34 + 14
```
34
+ 14
----
48
```
- Ones: 4 + 4 = 8
- Tens: 3 + 1 = 4
-
Answer: 48
---
2. 25 + 29
```
25
+ 29
----
54
```
- Ones: 5 + 9 = 14 → write down 4, carry over 1
- Tens: 2 + 2 + 1 (carry) = 5
-
Answer: 54
---
3. 31 + 17
```
31
+ 17
----
48
```
- Ones: 1 + 7 = 8
- Tens: 3 + 1 = 4
-
Answer: 48
---
Row 2
4. 25 + 18
```
25
+ 18
----
43
```
- Ones: 5 + 8 = 13 → write down 3, carry over 1
- Tens: 2 + 1 + 1 = 4
-
Answer: 43
---
5. 17 + 19
```
17
+ 19
----
36
```
- Ones: 7 + 9 = 16 → write down 6, carry over 1
- Tens: 1 + 1 + 1 = 3
-
Answer: 36
---
6. 18 + 12
```
18
+ 12
----
30
```
- Ones: 8 + 2 = 10 → write down 0, carry over 1
- Tens: 1 + 1 + 1 = 3
-
Answer: 30
---
Row 3
7. 21 + 27
```
21
+ 27
----
48
```
- Ones: 1 + 7 = 8
- Tens: 2 + 2 = 4
-
Answer: 48
---
8. 48 + 31
```
48
+ 31
----
79
```
- Ones: 8 + 1 = 9
- Tens: 4 + 3 = 7
-
Answer: 79
---
9. 26 + 23
```
26
+ 23
----
49
```
- Ones: 6 + 3 = 9
- Tens: 2 + 2 = 4
-
Answer: 49
---
Row 4
10. 45 + 10
```
45
+ 10
----
55
```
- Ones: 5 + 0 = 5
- Tens: 4 + 1 = 5
-
Answer: 55
---
11. 11 + 24
```
11
+ 24
----
35
```
- Ones: 1 + 4 = 5
- Tens: 1 + 2 = 3
-
Answer: 35
---
12. 17 + 23
```
17
+ 23
----
40
```
- Ones: 7 + 3 = 10 → write down 0, carry over 1
- Tens: 1 + 2 + 1 = 4
-
Answer: 40
---
## 📝 Final Answers (in order):
1.
48
2.
54
3.
48
4.
43
5.
36
6.
30
7.
48
8.
79
9.
49
10.
55
11.
35
12.
40
---
✔ You can now fill these answers into your worksheet! Let me know if you’d like a printable version or more practice sheets.
Parent Tip: Review the logic above to help your child master the concept of three digit addition worksheet 2nd.
