Year 3 Missing Numbers in Number Sentences Worksheet — Level 2 — 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 2 — Practice Set 2 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1. (answer space) + 20 = 64
Answer: 44
- 64 − 20 = 44
2.39 − (answer space) = 19
Answer: 20
- 39 − 19 = 20
3. (answer space) − 9 = 20
Answer: 29
- 20 + 9 = 29
4. (answer space) + 9 = 84
Answer: 75
- 84 − 9 = 75
5.6 + (answer space) = 37
Answer: 31
- 37 − 6 = 31
6. (answer space) + 45 = 63
Answer: 18
- 63 − 45 = 18
7.22 + (answer space) = 37
Answer: 15
- 37 − 22 = 15
8.67 − (answer space) = 47
Answer: 20
- 67 − 47 = 20
9.8 + (answer space) = 36
Answer: 28
- 36 − 8 = 28
10. (answer space) − 7 = 50
Answer: 57
- 50 + 7 = 57
11.71 + (answer space) = 88
Answer: 17
- 88 − 71 = 17
12. (answer space) + 78 = 82
Answer: 4
- 82 − 78 = 4
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.