Year 4 Missing Numbers in Number Sentences Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 4 addition worksheet.
Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · AdditionYear 4 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) + 10 = 18
Answer: 8
- 18 − 10 = 8
2. (answer space) − 18 = 2
Answer: 20
- 2 + 18 = 20
3. (answer space) − 13 = 4
Answer: 17
- 4 + 13 = 17
4.5 + (answer space) = 11
Answer: 6
- 11 − 5 = 6
5.9 − (answer space) = 4
Answer: 5
- 9 − 4 = 5
6.3 + (answer space) = 7
Answer: 4
- 7 − 3 = 4
7.7 − (answer space) = 2
Answer: 5
- 7 − 2 = 5
8.2 + (answer space) = 12
Answer: 10
- 12 − 2 = 10
9. (answer space) − 5 = 1
Answer: 6
- 1 + 5 = 6
10. (answer space) + 8 = 9
Answer: 1
- 9 − 8 = 1
11. (answer space) + 3 = 12
Answer: 9
- 12 − 3 = 9
12. (answer space) + 7 = 8
Answer: 1
- 8 − 7 = 1
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.