Year 3 Addition Worksheet — Getting Started — Answers
Answer sheet with worked solutions for the Year 3 addition worksheet.
Year 3 Addition Worksheet — Getting Started — Answers
Set out each sum in columns. Show any regrouping.
1.
23
+64
Answer: 87
- 3 + 4 = 7
- 2 + 6 = 8
2.
21
+14
Answer: 35
- 1 + 4 = 5
- 2 + 1 = 3
3.
79
+20
Answer: 99
- 9 + 0 = 9
- 7 + 2 = 9
4.
66
+19
Answer: 85
- 6 + 9 = 15 → write 5, carry 1
- 6 + 1 + 1 = 8
5.
41
+31
Answer: 72
- 1 + 1 = 2
- 4 + 3 = 7
6.
14
+84
Answer: 98
- 4 + 4 = 8
- 1 + 8 = 9
7.
56
+13
Answer: 69
- 6 + 3 = 9
- 5 + 1 = 6
8.
13
+71
Answer: 84
- 3 + 1 = 4
- 1 + 7 = 8
9.
58
+41
Answer: 99
- 8 + 1 = 9
- 5 + 4 = 9
10.
71
+28
Answer: 99
- 1 + 8 = 9
- 7 + 2 = 9
11.
34
+14
Answer: 48
- 4 + 4 = 8
- 3 + 1 = 4
12.
17
+82
Answer: 99
- 7 + 2 = 9
- 1 + 8 = 9
13.
25
+50
Answer: 75
- 5 + 0 = 5
- 2 + 5 = 7
14.
67
+32
Answer: 99
- 7 + 2 = 9
- 6 + 3 = 9
15.
89
+10
Answer: 99
- 9 + 0 = 9
- 8 + 1 = 9
16.
71
+18
Answer: 89
- 1 + 8 = 9
- 7 + 1 = 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.