Year 2 Mental Addition and Subtraction Strategies Worksheet — Level 2 — Answers
Answer sheet with worked solutions for the Year 2 addition worksheet.
Success TutoringWorksheetsAnswer sheetYear 2 · Mathematics · AdditionYear 2 Mental Addition and Subtraction Strategies Worksheet — Level 2 — Answers
Fill in each step of the strategy, then write the answer.
1.69 + 9 = 69 + 1 + (answer space) = (answer space)
Answer: 8, 78
- 69 + 1 = 70 (a ten)
- 70 + 8 = 78
2.71 + 9 = 71 + 10 − (answer space) = (answer space)
Answer: 1, 80
- 71 + 10 = 81
- 81 − 1 = 80
3.42 + 41 = (answer space) + (answer space) + 1 = (answer space)
Answer: 41, 41, 83
- Double 41 is 82
- 82 + 1 = 83
4.67 + 6 = 67 + 3 + (answer space) = (answer space)
Answer: 3, 73
- 67 + 3 = 70 (a ten)
- 70 + 3 = 73
5.11 + 9 = 11 + 10 − (answer space) = (answer space)
Answer: 1, 20
- 11 + 10 = 21
- 21 − 1 = 20
6.43 + 42 = (answer space) + (answer space) + 1 = (answer space)
Answer: 42, 42, 85
- Double 42 is 84
- 84 + 1 = 85
7.87 + 8 = 87 + 3 + (answer space) = (answer space)
Answer: 5, 95
- 87 + 3 = 90 (a ten)
- 90 + 5 = 95
8.45 + 9 = 45 + 10 − (answer space) = (answer space)
Answer: 1, 54
- 45 + 10 = 55
- 55 − 1 = 54
9.15 + 14 = (answer space) + (answer space) + 1 = (answer space)
Answer: 14, 14, 29
- Double 14 is 28
- 28 + 1 = 29
10.26 + 6 = 26 + 4 + (answer space) = (answer space)
Answer: 2, 32
- 26 + 4 = 30 (a ten)
- 30 + 2 = 32
11.50 + 9 = 50 + 10 − (answer space) = (answer space)
Answer: 1, 59
- 50 + 10 = 60
- 60 − 1 = 59
12.26 + 25 = (answer space) + (answer space) + 1 = (answer space)
Answer: 25, 25, 51
- Double 25 is 50
- 50 + 1 = 51
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.