Year 3 Missing Numbers in Number Sentences Worksheet — Level 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 3 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1. (answer space) − 397 = 295
Answer: 692
- 295 + 397 = 692
2.252 − (answer space) = 118
Answer: 134
- 252 − 118 = 134
3. (answer space) + 246 = 275
Answer: 29
- 275 − 246 = 29
4. (answer space) + 467 = 842
Answer: 375
- 842 − 467 = 375
5.311 + (answer space) = 403
Answer: 92
- 403 − 311 = 92
6. (answer space) + 91 = 976
Answer: 885
- 976 − 91 = 885
7. (answer space) − 453 = 220
Answer: 673
- 220 + 453 = 673
8.782 − (answer space) = 450
Answer: 332
- 782 − 450 = 332
9. (answer space) − 52 = 246
Answer: 298
- 246 + 52 = 298
10. (answer space) + 492 = 503
Answer: 11
- 503 − 492 = 11
11.352 − (answer space) = 129
Answer: 223
- 352 − 129 = 223
12.811 − (answer space) = 690
Answer: 121
- 811 − 690 = 121
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.