Year 3 Addition Worksheet — Getting Started — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 3 addition worksheet.
Success TutoringWorksheetsAnswer sheetYear 3 · Mathematics · AdditionYear 3 Addition Worksheet — Getting Started — Practice Set 3 — Answers
Set out each sum in columns. Show any regrouping.
1.
83
+16
Answer: 99
- 3 + 6 = 9
- 8 + 1 = 9
2.
17
+75
Answer: 92
- 7 + 5 = 12 → write 2, carry 1
- 1 + 7 + 1 = 9
3.
88
+11
Answer: 99
- 8 + 1 = 9
- 8 + 1 = 9
4.
68
+31
Answer: 99
- 8 + 1 = 9
- 6 + 3 = 9
5.
63
+34
Answer: 97
- 3 + 4 = 7
- 6 + 3 = 9
6.
25
+11
Answer: 36
- 5 + 1 = 6
- 2 + 1 = 3
7.
32
+54
Answer: 86
- 2 + 4 = 6
- 3 + 5 = 8
8.
74
+22
Answer: 96
- 4 + 2 = 6
- 7 + 2 = 9
9.
73
+26
Answer: 99
- 3 + 6 = 9
- 7 + 2 = 9
10.
56
+37
Answer: 93
- 6 + 7 = 13 → write 3, carry 1
- 5 + 3 + 1 = 9
11.
67
+17
Answer: 84
- 7 + 7 = 14 → write 4, carry 1
- 6 + 1 + 1 = 8
12.
20
+49
Answer: 69
- 0 + 9 = 9
- 2 + 4 = 6
13.
54
+25
Answer: 79
- 4 + 5 = 9
- 5 + 2 = 7
14.
46
+53
Answer: 99
- 6 + 3 = 9
- 4 + 5 = 9
15.
67
+23
Answer: 90
- 7 + 3 = 10 → write 0, carry 1
- 6 + 2 + 1 = 9
16.
34
+11
Answer: 45
- 4 + 1 = 5
- 3 + 1 = 4
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.
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