Year 3 Missing Numbers in Number Sentences Worksheet — Level 1 — Practice Set 2 — 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 — Practice Set 2 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1. (answer space) − 4 = 2
Answer: 6
- 2 + 4 = 6
2.11 − (answer space) = 6
Answer: 5
- 11 − 6 = 5
3. (answer space) + 1 = 6
Answer: 5
- 6 − 1 = 5
4. (answer space) + 4 = 8
Answer: 4
- 8 − 4 = 4
5. (answer space) + 2 = 6
Answer: 4
- 6 − 2 = 4
6. (answer space) − 6 = 2
Answer: 8
- 2 + 6 = 8
7.7 + (answer space) = 16
Answer: 9
- 16 − 7 = 9
8. (answer space) − 8 = 1
Answer: 9
- 1 + 8 = 9
9.3 + (answer space) = 9
Answer: 6
- 9 − 3 = 6
10. (answer space) + 2 = 15
Answer: 13
- 15 − 2 = 13
11.10 − (answer space) = 6
Answer: 4
- 10 − 6 = 4
12. (answer space) + 9 = 19
Answer: 10
- 19 − 9 = 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.