Let's solve each of the addition problems step by step.
---
1)
```
51
+42
----
```
Add the ones place: 1 + 2 = 3
Add the tens place: 5 + 4 = 9
Answer:
93
---
2)
```
37
+42
----
```
Ones: 7 + 2 = 9
Tens: 3 + 4 = 7
Answer:
79
---
3)
```
42
+36
----
```
Ones: 2 + 6 = 8
Tens: 4 + 3 = 7
Answer:
78
---
4)
```
52
+34
----
```
Ones: 2 + 4 = 6
Tens: 5 + 3 = 8
Answer:
86
---
5)
```
33
+35
----
```
Ones: 3 + 5 = 8
Tens: 3 + 3 = 6
Answer:
68
---
6)
```
27
+62
----
```
Ones: 7 + 2 = 9
Tens: 2 + 6 = 8
Answer:
89
---
7)
```
11
+34
----
```
Ones: 1 + 4 = 5
Tens: 1 + 3 = 4
Answer:
45
---
8)
```
67
+12
----
```
Ones: 7 + 2 = 9
Tens: 6 + 1 = 7
Answer:
79
---
9)
```
34
+42
----
```
Ones: 4 + 2 = 6
Tens: 3 + 4 = 7
Answer:
76
---
10)
```
23
+45
----
```
Ones: 3 + 5 = 8
Tens: 2 + 4 = 6
Answer:
68
---
11)
```
34
+25
----
```
Ones: 4 + 5 = 9
Tens: 3 + 2 = 5
Answer:
59
---
12)
```
42
+31
----
```
Ones: 2 + 1 = 3
Tens: 4 + 3 = 7
Answer:
73
---
✔ Final Answers:
1)
93
2)
79
3)
78
4)
86
5)
68
6)
89
7)
45
8)
79
9)
76
10)
68
11)
59
12)
73
Let me know if you'd like this formatted as a printable answer sheet!
Parent Tip: Review the logic above to help your child master the concept of adding two digit numbers worksheet.
