Year 2 Missing Numbers in Number Sentences Worksheet — Level 1 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 2 addition worksheet.
Success TutoringWorksheetsAnswer sheetYear 2 · Mathematics · AdditionYear 2 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 = 18
Answer: 19
- 18 + 1 = 19
2. (answer space) + 8 = 9
Answer: 1
- 9 − 8 = 1
3.20 − (answer space) = 12
Answer: 8
- 20 − 12 = 8
4.15 − (answer space) = 13
Answer: 2
- 15 − 13 = 2
5. (answer space) + 13 = 15
Answer: 2
- 15 − 13 = 2
6. (answer space) − 2 = 4
Answer: 6
- 4 + 2 = 6
7.10 + (answer space) = 16
Answer: 6
- 16 − 10 = 6
8. (answer space) + 3 = 19
Answer: 16
- 19 − 3 = 16
9.7 − (answer space) = 5
Answer: 2
- 7 − 5 = 2
10. (answer space) + 4 = 11
Answer: 7
- 11 − 4 = 7
11.16 − (answer space) = 15
Answer: 1
- 16 − 15 = 1
12.1 + (answer space) = 18
Answer: 17
- 18 − 1 = 17
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.