Year 2 Mental Addition and Subtraction Strategies Worksheet — Level 2 — Practice Set 3 — 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 — Practice Set 3 — Answers
Fill in each step of the strategy, then write the answer.
1.16 + 5 = 16 + 4 + (answer space) = (answer space)
Answer: 1, 21
- 16 + 4 = 20 (a ten)
- 20 + 1 = 21
2.38 + 9 = 38 + 10 − (answer space) = (answer space)
Answer: 1, 47
- 38 + 10 = 48
- 48 − 1 = 47
3.61 + 62 = (answer space) + (answer space) + 1 = (answer space)
Answer: 61, 61, 123
- Double 61 is 122
- 122 + 1 = 123
4.56 + 9 = 56 + 4 + (answer space) = (answer space)
Answer: 5, 65
- 56 + 4 = 60 (a ten)
- 60 + 5 = 65
5.39 + 9 = 39 + 10 − (answer space) = (answer space)
Answer: 1, 48
- 39 + 10 = 49
- 49 − 1 = 48
6.36 + 37 = (answer space) + (answer space) + 1 = (answer space)
Answer: 36, 36, 73
- Double 36 is 72
- 72 + 1 = 73
7.26 + 8 = 26 + 4 + (answer space) = (answer space)
Answer: 4, 34
- 26 + 4 = 30 (a ten)
- 30 + 4 = 34
8.49 + 9 = 49 + 10 − (answer space) = (answer space)
Answer: 1, 58
- 49 + 10 = 59
- 59 − 1 = 58
9.75 + 74 = (answer space) + (answer space) + 1 = (answer space)
Answer: 74, 74, 149
- Double 74 is 148
- 148 + 1 = 149
10.86 + 9 = 86 + 4 + (answer space) = (answer space)
Answer: 5, 95
- 86 + 4 = 90 (a ten)
- 90 + 5 = 95
11.87 + 9 = 87 + 10 − (answer space) = (answer space)
Answer: 1, 96
- 87 + 10 = 97
- 97 − 1 = 96
12.84 + 85 = (answer space) + (answer space) + 1 = (answer space)
Answer: 84, 84, 169
- Double 84 is 168
- 168 + 1 = 169
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.