1st Grade Addition Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 1st Grade addition worksheet.
1st Grade Addition Worksheet — Level 2 — Practice Set 3 — Answers
Set out each sum in columns. Show any regrouping.
1.
19
+18
Answer: 37
- 9 + 8 = 17 → write 7, carry 1
- 1 + 1 + 1 = 3
2.
89
+10
Answer: 99
- 9 + 0 = 9
- 8 + 1 = 9
3.
31
+26
Answer: 57
- 1 + 6 = 7
- 3 + 2 = 5
4.
21
+18
Answer: 39
- 1 + 8 = 9
- 2 + 1 = 3
5.
85
+14
Answer: 99
- 5 + 4 = 9
- 8 + 1 = 9
6.
54
+20
Answer: 74
- 4 + 0 = 4
- 5 + 2 = 7
7.
46
+32
Answer: 78
- 6 + 2 = 8
- 4 + 3 = 7
8.
42
+45
Answer: 87
- 2 + 5 = 7
- 4 + 4 = 8
9.
63
+36
Answer: 99
- 3 + 6 = 9
- 6 + 3 = 9
10.
62
+37
Answer: 99
- 2 + 7 = 9
- 6 + 3 = 9
11.
22
+73
Answer: 95
- 2 + 3 = 5
- 2 + 7 = 9
12.
58
+39
Answer: 97
- 8 + 9 = 17 → write 7, carry 1
- 5 + 3 + 1 = 9
13.
15
+28
Answer: 43
- 5 + 8 = 13 → write 3, carry 1
- 1 + 2 + 1 = 4
14.
52
+31
Answer: 83
- 2 + 1 = 3
- 5 + 3 = 8
15.
71
+28
Answer: 99
- 1 + 8 = 9
- 7 + 2 = 9
16.
26
+32
Answer: 58
- 6 + 2 = 8
- 2 + 3 = 5
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.