Year 3 Missing Numbers in Number Sentences Worksheet — Level 1 — Answers
Answer sheet with worked solutions for the Year 3 addition worksheet.
Success TutoringWorksheetsAnswer sheetYear 3 · Mathematics · AdditionYear 3 Missing Numbers in Number Sentences Worksheet — Level 1 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1. (answer space) + 4 = 6
Answer: 2
- 6 − 4 = 2
2.10 + (answer space) = 16
Answer: 6
- 16 − 10 = 6
3.15 + (answer space) = 16
Answer: 1
- 16 − 15 = 1
4. (answer space) + 3 = 9
Answer: 6
- 9 − 3 = 6
5. (answer space) + 6 = 9
Answer: 3
- 9 − 6 = 3
6.12 − (answer space) = 4
Answer: 8
- 12 − 4 = 8
7.13 + (answer space) = 16
Answer: 3
- 16 − 13 = 3
8. (answer space) − 1 = 5
Answer: 6
- 5 + 1 = 6
9.2 + (answer space) = 20
Answer: 18
- 20 − 2 = 18
10. (answer space) + 1 = 8
Answer: 7
- 8 − 1 = 7
11.7 + (answer space) = 11
Answer: 4
- 11 − 7 = 4
12.1 + (answer space) = 11
Answer: 10
- 11 − 1 = 10
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.