Year 2 Mental Addition and Subtraction Strategies Worksheet — Level 2 — Practice Set 4 — 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 4 — Answers
Fill in each step of the strategy, then write the answer.
1.58 + 5 = 58 + 2 + (answer space) = (answer space)
Answer: 3, 63
- 58 + 2 = 60 (a ten)
- 60 + 3 = 63
2.47 + 9 = 47 + 10 − (answer space) = (answer space)
Answer: 1, 56
- 47 + 10 = 57
- 57 − 1 = 56
3.63 + 64 = (answer space) + (answer space) + 1 = (answer space)
Answer: 63, 63, 127
- Double 63 is 126
- 126 + 1 = 127
4.67 + 4 = 67 + 3 + (answer space) = (answer space)
Answer: 1, 71
- 67 + 3 = 70 (a ten)
- 70 + 1 = 71
5.44 + 9 = 44 + 10 − (answer space) = (answer space)
Answer: 1, 53
- 44 + 10 = 54
- 54 − 1 = 53
6.18 + 19 = (answer space) + (answer space) + 1 = (answer space)
Answer: 18, 18, 37
- Double 18 is 36
- 36 + 1 = 37
7.27 + 6 = 27 + 3 + (answer space) = (answer space)
Answer: 3, 33
- 27 + 3 = 30 (a ten)
- 30 + 3 = 33
8.37 + 9 = 37 + 10 − (answer space) = (answer space)
Answer: 1, 46
- 37 + 10 = 47
- 47 − 1 = 46
9.30 + 29 = (answer space) + (answer space) + 1 = (answer space)
Answer: 29, 29, 59
- Double 29 is 58
- 58 + 1 = 59
10.36 + 8 = 36 + 4 + (answer space) = (answer space)
Answer: 4, 44
- 36 + 4 = 40 (a ten)
- 40 + 4 = 44
11.21 + 9 = 21 + 10 − (answer space) = (answer space)
Answer: 1, 30
- 21 + 10 = 31
- 31 − 1 = 30
12.73 + 72 = (answer space) + (answer space) + 1 = (answer space)
Answer: 72, 72, 145
- Double 72 is 144
- 144 + 1 = 145
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.