3rd Grade Missing Numbers in Number Sentences Worksheet — Level 1 — Practice Set 3 — 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 1 — Practice Set 3 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1. (answer space) − 1 = 5
Answer: 6
- 5 + 1 = 6
2. (answer space) + 12 = 17
Answer: 5
- 17 − 12 = 5
3. (answer space) − 4 = 2
Answer: 6
- 2 + 4 = 6
4. (answer space) − 6 = 7
Answer: 13
- 7 + 6 = 13
5.17 − (answer space) = 2
Answer: 15
- 17 − 2 = 15
6.2 + (answer space) = 11
Answer: 9
- 11 − 2 = 9
7.3 + (answer space) = 12
Answer: 9
- 12 − 3 = 9
8.5 + (answer space) = 8
Answer: 3
- 8 − 5 = 3
9. (answer space) − 11 = 5
Answer: 16
- 5 + 11 = 16
10. (answer space) − 4 = 14
Answer: 18
- 14 + 4 = 18
11.12 − (answer space) = 10
Answer: 2
- 12 − 10 = 2
12. (answer space) − 5 = 5
Answer: 10
- 5 + 5 = 10
Marking tips
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- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
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