Year 3 Addition Worksheet — Getting Started — Practice Set 4 — 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 4 — Answers
Set out each sum in columns. Show any regrouping.
1.
55
+44
Answer: 99
- 5 + 4 = 9
- 5 + 4 = 9
2.
82
+17
Answer: 99
- 2 + 7 = 9
- 8 + 1 = 9
3.
22
+45
Answer: 67
- 2 + 5 = 7
- 2 + 4 = 6
4.
38
+61
Answer: 99
- 8 + 1 = 9
- 3 + 6 = 9
5.
88
+11
Answer: 99
- 8 + 1 = 9
- 8 + 1 = 9
6.
78
+21
Answer: 99
- 8 + 1 = 9
- 7 + 2 = 9
7.
51
+26
Answer: 77
- 1 + 6 = 7
- 5 + 2 = 7
8.
52
+44
Answer: 96
- 2 + 4 = 6
- 5 + 4 = 9
9.
25
+23
Answer: 48
- 5 + 3 = 8
- 2 + 2 = 4
10.
39
+12
Answer: 51
- 9 + 2 = 11 → write 1, carry 1
- 3 + 1 + 1 = 5
11.
70
+29
Answer: 99
- 0 + 9 = 9
- 7 + 2 = 9
12.
72
+21
Answer: 93
- 2 + 1 = 3
- 7 + 2 = 9
13.
19
+42
Answer: 61
- 9 + 2 = 11 → write 1, carry 1
- 1 + 4 + 1 = 6
14.
79
+20
Answer: 99
- 9 + 0 = 9
- 7 + 2 = 9
15.
21
+61
Answer: 82
- 1 + 1 = 2
- 2 + 6 = 8
16.
39
+31
Answer: 70
- 9 + 1 = 10 → write 0, carry 1
- 3 + 3 + 1 = 7
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.