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.
1.371 + (answer space) = 422
Answer: 51
- 422 − 371 = 51
2. (answer space) + 282 = 992
Answer: 710
- 992 − 282 = 710
3. (answer space) − 177 = 172
Answer: 349
- 172 + 177 = 349
4.895 − (answer space) = 104
Answer: 791
- 895 − 104 = 791
5. (answer space) − 187 = 353
Answer: 540
- 353 + 187 = 540
6. (answer space) − 193 = 773
Answer: 966
- 773 + 193 = 966
7.705 − (answer space) = 459
Answer: 246
- 705 − 459 = 246
8. (answer space) + 89 = 375
Answer: 286
- 375 − 89 = 286
9.44 + (answer space) = 620
Answer: 576
- 620 − 44 = 576
10. (answer space) − 613 = 52
Answer: 665
- 52 + 613 = 665
11. (answer space) + 152 = 355
Answer: 203
- 355 − 152 = 203
12.823 − (answer space) = 3
Answer: 820
- 823 − 3 = 820
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.