3rd Grade Missing Numbers in Number Sentences Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the 3rd Grade addition worksheet.
Success TutoringWorksheetsAnswer sheet3rd Grade · Mathematics · Addition3rd Grade 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.
1.291 − (answer space) = 245
Answer: 46
- 291 − 245 = 46
2.40 + (answer space) = 399
Answer: 359
- 399 − 40 = 359
3.703 − (answer space) = 148
Answer: 555
- 703 − 148 = 555
4. (answer space) − 181 = 107
Answer: 288
- 107 + 181 = 288
5. (answer space) + 518 = 805
Answer: 287
- 805 − 518 = 287
6. (answer space) − 316 = 351
Answer: 667
- 351 + 316 = 667
7.47 + (answer space) = 411
Answer: 364
- 411 − 47 = 364
8.310 + (answer space) = 494
Answer: 184
- 494 − 310 = 184
9.35 + (answer space) = 449
Answer: 414
- 449 − 35 = 414
10. (answer space) − 127 = 519
Answer: 646
- 519 + 127 = 646
11. (answer space) − 204 = 545
Answer: 749
- 545 + 204 = 749
12. (answer space) + 161 = 403
Answer: 242
- 403 − 161 = 242
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.