Year 3 Missing Numbers in Number Sentences Worksheet — Level 3 — Practice Set 4 — 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 4 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1. (answer space) − 13 = 356
Answer: 369
- 356 + 13 = 369
2. (answer space) − 684 = 70
Answer: 754
- 70 + 684 = 754
3. (answer space) + 81 = 366
Answer: 285
- 366 − 81 = 285
4.363 − (answer space) = 236
Answer: 127
- 363 − 236 = 127
5.638 − (answer space) = 407
Answer: 231
- 638 − 407 = 231
6.520 + (answer space) = 893
Answer: 373
- 893 − 520 = 373
7. (answer space) + 151 = 380
Answer: 229
- 380 − 151 = 229
8.414 − (answer space) = 35
Answer: 379
- 414 − 35 = 379
9.998 − (answer space) = 491
Answer: 507
- 998 − 491 = 507
10. (answer space) − 149 = 175
Answer: 324
- 175 + 149 = 324
11. (answer space) + 572 = 658
Answer: 86
- 658 − 572 = 86
12. (answer space) + 160 = 386
Answer: 226
- 386 − 160 = 226
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.