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.
1.9 − (answer space) = 8
Answer: 1
- 9 − 8 = 1
2.12 − (answer space) = 1
Answer: 11
- 12 − 1 = 11
3. (answer space) + 7 = 10
Answer: 3
- 10 − 7 = 3
4.5 − (answer space) = 4
Answer: 1
- 5 − 4 = 1
5.9 + (answer space) = 13
Answer: 4
- 13 − 9 = 4
6. (answer space) + 7 = 9
Answer: 2
- 9 − 7 = 2
7.7 + (answer space) = 9
Answer: 2
- 9 − 7 = 2
8. (answer space) + 7 = 8
Answer: 1
- 8 − 7 = 1
9. (answer space) − 5 = 10
Answer: 15
- 10 + 5 = 15
10. (answer space) − 12 = 4
Answer: 16
- 4 + 12 = 16
11. (answer space) − 9 = 8
Answer: 17
- 8 + 9 = 17
12.13 − (answer space) = 5
Answer: 8
- 13 − 5 = 8
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.