3rd Grade Addition Worksheet — Getting Started — Practice Set 4 — Answers
Answer sheet with worked solutions for the 3rd Grade addition worksheet.
3rd Grade Addition Worksheet — Getting Started — Practice Set 4 — Answers
Set out each sum in columns. Show any regrouping.
1.
70
+15
Answer: 85
- 0 + 5 = 5
- 7 + 1 = 8
2.
41
+38
Answer: 79
- 1 + 8 = 9
- 4 + 3 = 7
3.
30
+15
Answer: 45
- 0 + 5 = 5
- 3 + 1 = 4
4.
27
+71
Answer: 98
- 7 + 1 = 8
- 2 + 7 = 9
5.
64
+35
Answer: 99
- 4 + 5 = 9
- 6 + 3 = 9
6.
51
+48
Answer: 99
- 1 + 8 = 9
- 5 + 4 = 9
7.
71
+20
Answer: 91
- 1 + 0 = 1
- 7 + 2 = 9
8.
13
+27
Answer: 40
- 3 + 7 = 10 → write 0, carry 1
- 1 + 2 + 1 = 4
9.
63
+31
Answer: 94
- 3 + 1 = 4
- 6 + 3 = 9
10.
57
+42
Answer: 99
- 7 + 2 = 9
- 5 + 4 = 9
11.
77
+22
Answer: 99
- 7 + 2 = 9
- 7 + 2 = 9
12.
72
+27
Answer: 99
- 2 + 7 = 9
- 7 + 2 = 9
13.
62
+26
Answer: 88
- 2 + 6 = 8
- 6 + 2 = 8
14.
12
+83
Answer: 95
- 2 + 3 = 5
- 1 + 8 = 9
15.
33
+19
Answer: 52
- 3 + 9 = 12 → write 2, carry 1
- 3 + 1 + 1 = 5
16.
62
+24
Answer: 86
- 2 + 4 = 6
- 6 + 2 = 8
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.