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Year 2 Mental Addition and Subtraction Strategies Worksheet — Level 3 — Practice Set 2 — Answers

Answer sheet with worked solutions for the Year 2 addition worksheet.

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Success TutoringWorksheetsAnswer sheetYear 2 · Mathematics · Addition

Year 2 Mental Addition and Subtraction Strategies Worksheet — Level 3 — Practice Set 2 — Answers

Fill in each step of the strategy, then write the answer.

1.95 + 19 = 95 + 20 − (answer space) = (answer space)

Answer: 1, 114

  1. 95 + 20 = 115
  2. 115 − 1 = 114
2.136 − 98 = 136 − 100 + (answer space) = (answer space)

Answer: 2, 38

  1. 136 − 100 = 36
  2. I took away 2 too many, so add it back: 36 + 2 = 38
3.71 − 3 = 71 − 1 − (answer space) = (answer space)

Answer: 2, 68

  1. 71 − 1 = 70 (back to a ten)
  2. 70 − 2 = 68
4.165 + 49 = 165 + 50 − (answer space) = (answer space)

Answer: 1, 214

  1. 165 + 50 = 215
  2. 215 − 1 = 214
5.77 − 48 = 77 − 50 + (answer space) = (answer space)

Answer: 2, 29

  1. 77 − 50 = 27
  2. I took away 2 too many, so add it back: 27 + 2 = 29
6.41 − 4 = 41 − 1 − (answer space) = (answer space)

Answer: 3, 37

  1. 41 − 1 = 40 (back to a ten)
  2. 40 − 3 = 37
7.123 + 29 = 123 + 30 − (answer space) = (answer space)

Answer: 1, 152

  1. 123 + 30 = 153
  2. 153 − 1 = 152
8.154 − 99 = 154 − 100 + (answer space) = (answer space)

Answer: 1, 55

  1. 154 − 100 = 54
  2. I took away 1 too many, so add it back: 54 + 1 = 55
9.164 − 5 = 164 − 4 − (answer space) = (answer space)

Answer: 1, 159

  1. 164 − 4 = 160 (back to a ten)
  2. 160 − 1 = 159
10.124 + 29 = 124 + 30 − (answer space) = (answer space)

Answer: 1, 153

  1. 124 + 30 = 154
  2. 154 − 1 = 153
11.92 − 49 = 92 − 50 + (answer space) = (answer space)

Answer: 1, 43

  1. 92 − 50 = 42
  2. I took away 1 too many, so add it back: 42 + 1 = 43
12.134 − 9 = 134 − 4 − (answer space) = (answer space)

Answer: 5, 125

  1. 134 − 4 = 130 (back to a ten)
  2. 130 − 5 = 125
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