Year 3 Missing Numbers in Number Sentences Worksheet — Level 2 — Practice Set 3 — 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 3 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1.53 − (answer space) = 40
Answer: 13
- 53 − 40 = 13
2.59 − (answer space) = 40
Answer: 19
- 59 − 40 = 19
3. (answer space) − 20 = 10
Answer: 30
- 10 + 20 = 30
4.77 − (answer space) = 36
Answer: 41
- 77 − 36 = 41
5.6 + (answer space) = 37
Answer: 31
- 37 − 6 = 31
6.85 + (answer space) = 99
Answer: 14
- 99 − 85 = 14
7.41 + (answer space) = 72
Answer: 31
- 72 − 41 = 31
8.35 + (answer space) = 42
Answer: 7
- 42 − 35 = 7
9. (answer space) − 43 = 45
Answer: 88
- 45 + 43 = 88
10.40 + (answer space) = 77
Answer: 37
- 77 − 40 = 37
11.6 + (answer space) = 42
Answer: 36
- 42 − 6 = 36
12.18 + (answer space) = 31
Answer: 13
- 31 − 18 = 13
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.