Year 3 Missing Numbers in Number Sentences Worksheet — Level 3 — 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 3 — Practice Set 2 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1. (answer space) − 540 = 295
Answer: 835
- 295 + 540 = 835
2. (answer space) − 948 = 21
Answer: 969
- 21 + 948 = 969
3.711 + (answer space) = 729
Answer: 18
- 729 − 711 = 18
4.462 − (answer space) = 123
Answer: 339
- 462 − 123 = 339
5. (answer space) − 725 = 115
Answer: 840
- 115 + 725 = 840
6.345 − (answer space) = 153
Answer: 192
- 345 − 153 = 192
7. (answer space) + 561 = 719
Answer: 158
- 719 − 561 = 158
8.137 + (answer space) = 823
Answer: 686
- 823 − 137 = 686
9.795 − (answer space) = 344
Answer: 451
- 795 − 344 = 451
10. (answer space) + 298 = 542
Answer: 244
- 542 − 298 = 244
11. (answer space) + 27 = 650
Answer: 623
- 650 − 27 = 623
12.429 + (answer space) = 918
Answer: 489
- 918 − 429 = 489
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.