Let’s solve each addition problem step by step. Remember, we are adding two-digit numbers without regrouping — that means the ones digits add up to 9 or less, and the tens digits also add up to 9 or less. We’ll stack them in a grid (tens on top, ones on bottom) and add column by column.
---
1. 46 + 43
Stack:
```
4 6
+ 4 3
------
```
Ones: 6 + 3 = 9
Tens: 4 + 4 = 8
Answer:
89
---
2. 75 + 10
Stack:
```
7 5
+ 1 0
------
```
Ones: 5 + 0 = 5
Tens: 7 + 1 = 8
Answer:
85
---
3. 61 + 32
Stack:
```
6 1
+ 3 2
------
```
Ones: 1 + 2 = 3
Tens: 6 + 3 = 9
Answer:
93
---
4. 65 + 24
Stack:
```
6 5
+ 2 4
------
```
Ones: 5 + 4 = 9
Tens: 6 + 2 = 8
Answer:
89
---
5. 76 + 20
Stack:
```
7 6
+ 2 0
------
```
Ones: 6 + 0 = 6
Tens: 7 + 2 = 9
Answer:
96
---
6. 26 + 20
Stack:
```
2 6
+ 2 0
------
```
Ones: 6 + 0 = 6
Tens: 2 + 2 = 4
Answer:
46
---
7. 45 + 24
Stack:
```
4 5
+ 2 4
------
```
Ones: 5 + 4 = 9
Tens: 4 + 2 = 6
Answer:
69
---
8. 16 + 13
Stack:
```
1 6
+ 1 3
------
```
Ones: 6 + 3 = 9
Tens: 1 + 1 = 2
Answer:
29
---
9. 62 + 27
Stack:
```
6 2
+ 2 7
------
```
Ones: 2 + 7 = 9
Tens: 6 + 2 = 8
Answer:
89
---
10. 35 + 13
Stack:
```
3 5
+ 1 3
------
```
Ones: 5 + 3 = 8
Tens: 3 + 1 = 4
Answer:
48
---
11. 78 + 21
Stack:
```
7 8
+ 2 1
------
```
Ones: 8 + 1 = 9
Tens: 7 + 2 = 9
Answer:
99
---
12. 63 + 15
Stack:
```
6 3
+ 1 5
------
```
Ones: 3 + 5 = 8
Tens: 6 + 1 = 7
Answer:
78
---
13. 80 + 10
Stack:
```
8 0
+ 1 0
------
```
Ones: 0 + 0 = 0
Tens: 8 + 1 = 9
Answer:
90
---
14. 23 + 23
Stack:
```
2 3
+ 2 3
------
```
Ones: 3 + 3 = 6
Tens: 2 + 2 = 4
Answer:
46
---
15. 46 + 22
Stack:
```
4 6
+ 2 2
------
```
Ones: 6 + 2 = 8
Tens: 4 + 2 = 6
Answer:
68
---
16. 12 + 15
Stack:
```
1 2
+ 1 5
------
```
Ones: 2 + 5 = 7
Tens: 1 + 1 = 2
Answer:
27
---
Final Answer:
46 + 43 = 89
75 + 10 = 85
61 + 32 = 93
65 + 24 = 89
76 + 20 = 96
26 + 20 = 46
45 + 24 = 69
16 + 13 = 29
62 + 27 = 89
35 + 13 = 48
78 + 21 = 99
63 + 15 = 78
80 + 10 = 90
23 + 23 = 46
46 + 22 = 68
12 + 15 = 27
Parent Tip: Review the logic above to help your child master the concept of worksheet in addition without regrouping.
