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.
1.1 + (answer space) = 824
Answer: 823
- 824 − 1 = 823
2. (answer space) − 180 = 399
Answer: 579
- 399 + 180 = 579
3.702 + (answer space) = 954
Answer: 252
- 954 − 702 = 252
4.483 − (answer space) = 339
Answer: 144
- 483 − 339 = 144
5.401 − (answer space) = 69
Answer: 332
- 401 − 69 = 332
6. (answer space) + 57 = 623
Answer: 566
- 623 − 57 = 566
7. (answer space) − 99 = 199
Answer: 298
- 199 + 99 = 298
8.319 + (answer space) = 748
Answer: 429
- 748 − 319 = 429
9.895 − (answer space) = 652
Answer: 243
- 895 − 652 = 243
10.913 − (answer space) = 195
Answer: 718
- 913 − 195 = 718
11. (answer space) − 174 = 758
Answer: 932
- 758 + 174 = 932
12.540 − (answer space) = 415
Answer: 125
- 540 − 415 = 125
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.