One-Digit Addition; With Regrouping (A) Worksheet for 1st - 2nd ... - Free Printable

Let’s solve each addition problem step by step. We’ll go row by row, column by column, and make sure we regroup (carry over) when needed.

We are adding two-digit numbers to single-digit or two-digit numbers — some will require regrouping (when the ones place adds up to 10 or more).

---

Row 1:

5 + 4 = 9
7 + 8 = 15 → write 5, carry 1 → but since it's just 7+8, answer is 15
1 + 4 = 5
9 + 9 = 18
7 + 2 = 9
1 + 7 = 8
7 + 6 = 13
4 + 5 = 9

Wait — looking at the layout, these are vertical additions. Let me re-read the structure.

Actually, each column has two numbers stacked vertically with a plus sign between them. So for example:

First column:
```
5
+ 4
----
```

So let’s do each column one by one, left to right, top to bottom.

There are 8 columns per row, and 8 rows? Wait — counting the problems:

Looking at the worksheet layout: It’s arranged in 8 columns across, and multiple rows down. Each “problem” is a vertical addition of two numbers.

Let me list all the problems in order, row by row, left to right.

---

Row 1 (top row):

1. 5 + 4 = 9
2. 7 + 8 = 15
3. 1 + 4 = 5
4. 9 + 9 = 18
5. 7 + 2 = 9
6. 1 + 7 = 8
7. 7 + 6 = 13
8. 4 + 5 = 9

---

Row 2:

9. 3 + 1 = 4
10. 2 + 2 = 4
11. 7 + 7 = 14
12. 3 + 3 = 6
13. 2 + 5 = 7
14. 5 + 6 = 11
15. 4 + 6 = 10
16. 5 + 5 = 10

---

Row 3:

17. 1 + 8 = 9
18. 6 + 7 = 13
19. 7 + 2 = 9
20. 4 + 2 = 6
21. 2 + 2 = 4
22. 4 + 4 = 8
23. 5 + 3 = 8
24. 6 + 9 = 15

---

Row 4:

25. 5 + 9 = 14
26. 2 + 1 = 3
27. 9 + 6 = 15
28. 3 + 3 = 6
29. 3 + 9 = 12
30. 3 + 3 = 6
31. 6 + 6 = 12
32. 1 + 1 = 2

---

Row 5:

33. 9 + 4 = 13
34. 6 + 1 = 7
35. 1 + 2 = 3
36. 9 + 8 = 17
37. 9 + 9 = 18
38. 6 + 7 = 13
39. 8 + 2 = 10
40. 4 + 2 = 6

---

Row 6:

41. 6 + 3 = 9
42. 8 + 9 = 17
43. 1 + 1 = 2
44. 4 + 8 = 12
45. 8 + 5 = 13
46. 3 + 5 = 8
47. 4 + 6 = 10
48. 7 + 1 = 8

---

Row 7:

49. 1 + 2 = 3
50. 4 + 4 = 8
51. 4 + 1 = 5
52. 7 + 1 = 8
53. 9 + 1 = 10
54. 2 + 9 = 11
55. 9 + 5 = 14
56. 8 + 8 = 16

---

Row 8 (bottom row):

57. 1 + 6 = 7
58. 3 + 4 = 7
59. 9 + 7 = 16
60. 9 + 9 = 18
61. 3 + 7 = 10
62. 4 + 6 = 10
63. 6 + 5 = 11
64. 5 + 9 = 14

---

Now, let’s double-check a few that might be tricky due to regrouping:

- Row 1, #2: 7 + 8 = 15 ✔
- Row 1, #4: 9 + 9 = 18 ✔
- Row 1, #7: 7 + 6 = 13 ✔
- Row 2, #3: 7 + 7 = 14 ✔
- Row 2, #6: 5 + 6 = 11 ✔
- Row 2, #7: 4 + 6 = 10 ✔
- Row 3, #2: 6 + 7 = 13 ✔
- Row 3, #8: 6 + 9 = 15 ✔
- Row 4, #1: 5 + 9 = 14 ✔
- Row 4, #3: 9 + 6 = 15 ✔
- Row 4, #5: 3 + 9 = 12 ✔
- Row 4, #7: 6 + 6 = 12 ✔
- Row 5, #1: 9 + 4 = 13 ✔
- Row 5, #4: 9 + 8 = 17 ✔
- Row 5, #5: 9 + 9 = 18 ✔
- Row 5, #6: 6 + 7 = 13 ✔
- Row 5, #7: 8 + 2 = 10 ✔
- Row 6, #2: 8 + 9 = 17 ✔
- Row 6, #4: 4 + 8 = 12 ✔
- Row 6, #5: 8 + 5 = 13 ✔
- Row 6, #7: 4 + 6 = 10 ✔
- Row 7, #5: 9 + 1 = 10 ✔
- Row 7, #6: 2 + 9 = 11 ✔
- Row 7, #7: 9 + 5 = 14 ✔
- Row 7, #8: 8 + 8 = 16 ✔
- Row 8, #3: 9 + 7 = 16 ✔
- Row 8, #4: 9 + 9 = 18 ✔
- Row 8, #5: 3 + 7 = 10 ✔
- Row 8, #6: 4 + 6 = 10 ✔
- Row 8, #7: 6 + 5 = 11 ✔
- Row 8, #8: 5 + 9 = 14 ✔

All look correct.

---

Final Answer:
The sums for each problem, listed row by row from left to right, are:

Row 1: 9, 15, 5, 18, 9, 8, 13, 9
Row 2: 4, 4, 14, 6, 7, 11, 10, 10
Row 3: 9, 13, 9, 6, 4, 8, 8, 15
Row 4: 14, 3, 15, 6, 12, 6, 12, 2
Row 5: 13, 7, 3, 17, 18, 13, 10, 6
Row 6: 9, 17, 2, 12, 13, 8, 10, 8
Row 7: 3, 8, 5, 8, 10, 11, 14, 16
Row 8: 7, 7, 16, 18, 10, 10, 11, 14