Year 1 Missing Numbers in Number Sentences Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 1 addition worksheet.
Success TutoringWorksheetsAnswer sheetYear 1 · Mathematics · AdditionYear 1 Missing Numbers in Number Sentences Worksheet — Level 1 — Practice Set 4 — Answers
Write the missing number. Use addition to check subtraction, and subtraction to check addition.
1. (answer space) + 5 = 6
Answer: 1
- 6 − 5 = 1
2. (answer space) + 12 = 14
Answer: 2
- 14 − 12 = 2
3.2 + (answer space) = 16
Answer: 14
- 16 − 2 = 14
4. (answer space) − 6 = 4
Answer: 10
- 4 + 6 = 10
5.4 + (answer space) = 9
Answer: 5
- 9 − 4 = 5
6.12 − (answer space) = 7
Answer: 5
- 12 − 7 = 5
7.13 − (answer space) = 5
Answer: 8
- 13 − 5 = 8
8.17 − (answer space) = 12
Answer: 5
- 17 − 12 = 5
9. (answer space) + 7 = 10
Answer: 3
- 10 − 7 = 3
10.6 − (answer space) = 1
Answer: 5
- 6 − 1 = 5
11.11 + (answer space) = 18
Answer: 7
- 18 − 11 = 7
12.8 − (answer space) = 3
Answer: 5
- 8 − 3 = 5
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.