Year 3 Missing Numbers in Number Sentences Worksheet — Level 3 — 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 3 — Practice Set 3 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1.633 − (answer space) = 67
Answer: 566
- 633 − 67 = 566
2.176 + (answer space) = 801
Answer: 625
- 801 − 176 = 625
3. (answer space) + 401 = 626
Answer: 225
- 626 − 401 = 225
4. (answer space) + 410 = 478
Answer: 68
- 478 − 410 = 68
5.658 + (answer space) = 706
Answer: 48
- 706 − 658 = 48
6. (answer space) − 590 = 260
Answer: 850
- 260 + 590 = 850
7.458 + (answer space) = 606
Answer: 148
- 606 − 458 = 148
8.435 + (answer space) = 529
Answer: 94
- 529 − 435 = 94
9. (answer space) + 638 = 704
Answer: 66
- 704 − 638 = 66
10.436 − (answer space) = 49
Answer: 387
- 436 − 49 = 387
11.181 + (answer space) = 970
Answer: 789
- 970 − 181 = 789
12. (answer space) − 398 = 307
Answer: 705
- 307 + 398 = 705
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.