Year 3 Addition Worksheet — Getting Started — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 3 addition worksheet.
Year 3 Addition Worksheet — Getting Started — Practice Set 3 — Answers
Set out each sum in columns. Show any regrouping.
1.
75
+10
Answer: 85
- 5 + 0 = 5
- 7 + 1 = 8
2.
24
+75
Answer: 99
- 4 + 5 = 9
- 2 + 7 = 9
3.
79
+20
Answer: 99
- 9 + 0 = 9
- 7 + 2 = 9
4.
58
+30
Answer: 88
- 8 + 0 = 8
- 5 + 3 = 8
5.
53
+14
Answer: 67
- 3 + 4 = 7
- 5 + 1 = 6
6.
80
+18
Answer: 98
- 0 + 8 = 8
- 8 + 1 = 9
7.
50
+49
Answer: 99
- 0 + 9 = 9
- 5 + 4 = 9
8.
45
+42
Answer: 87
- 5 + 2 = 7
- 4 + 4 = 8
9.
62
+13
Answer: 75
- 2 + 3 = 5
- 6 + 1 = 7
10.
88
+11
Answer: 99
- 8 + 1 = 9
- 8 + 1 = 9
11.
50
+13
Answer: 63
- 0 + 3 = 3
- 5 + 1 = 6
12.
73
+15
Answer: 88
- 3 + 5 = 8
- 7 + 1 = 8
13.
36
+46
Answer: 82
- 6 + 6 = 12 → write 2, carry 1
- 3 + 4 + 1 = 8
14.
51
+17
Answer: 68
- 1 + 7 = 8
- 5 + 1 = 6
15.
66
+33
Answer: 99
- 6 + 3 = 9
- 6 + 3 = 9
16.
51
+48
Answer: 99
- 1 + 8 = 9
- 5 + 4 = 9
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.