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.
1.8 + (answer space) = 13
Answer: 5
- 13 − 8 = 5
2. (answer space) + 3 = 5
Answer: 2
- 5 − 3 = 2
3.2 + (answer space) = 11
Answer: 9
- 11 − 2 = 9
4.11 − (answer space) = 1
Answer: 10
- 11 − 1 = 10
5.2 + (answer space) = 20
Answer: 18
- 20 − 2 = 18
6.11 − (answer space) = 4
Answer: 7
- 11 − 4 = 7
7.17 − (answer space) = 9
Answer: 8
- 17 − 9 = 8
8. (answer space) + 3 = 7
Answer: 4
- 7 − 3 = 4
9. (answer space) + 13 = 14
Answer: 1
- 14 − 13 = 1
10. (answer space) + 1 = 18
Answer: 17
- 18 − 1 = 17
11.17 − (answer space) = 13
Answer: 4
- 17 − 13 = 4
12.6 − (answer space) = 2
Answer: 4
- 6 − 2 = 4
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.