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

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

1.114 + 98 = 114 + 100 − (answer space) = (answer space)

Answer: 2, 212

  1. 114 + 100 = 214
  2. 214 − 2 = 212
2.58 − 19 = 58 − 20 + (answer space) = (answer space)

Answer: 1, 39

  1. 58 − 20 = 38
  2. I took away 1 too many, so add it back: 38 + 1 = 39
3.184 − 6 = 184 − 4 − (answer space) = (answer space)

Answer: 2, 178

  1. 184 − 4 = 180 (back to a ten)
  2. 180 − 2 = 178
4.86 + 29 = 86 + 30 − (answer space) = (answer space)

Answer: 1, 115

  1. 86 + 30 = 116
  2. 116 − 1 = 115
5.117 − 28 = 117 − 30 + (answer space) = (answer space)

Answer: 2, 89

  1. 117 − 30 = 87
  2. I took away 2 too many, so add it back: 87 + 2 = 89
6.194 − 6 = 194 − 4 − (answer space) = (answer space)

Answer: 2, 188

  1. 194 − 4 = 190 (back to a ten)
  2. 190 − 2 = 188
7.25 + 49 = 25 + 50 − (answer space) = (answer space)

Answer: 1, 74

  1. 25 + 50 = 75
  2. 75 − 1 = 74
8.83 − 29 = 83 − 30 + (answer space) = (answer space)

Answer: 1, 54

  1. 83 − 30 = 53
  2. I took away 1 too many, so add it back: 53 + 1 = 54
9.101 − 5 = 101 − 1 − (answer space) = (answer space)

Answer: 4, 96

  1. 101 − 1 = 100 (back to a ten)
  2. 100 − 4 = 96
10.197 + 39 = 197 + 40 − (answer space) = (answer space)

Answer: 1, 236

  1. 197 + 40 = 237
  2. 237 − 1 = 236
11.144 − 59 = 144 − 60 + (answer space) = (answer space)

Answer: 1, 85

  1. 144 − 60 = 84
  2. I took away 1 too many, so add it back: 84 + 1 = 85
12.72 − 8 = 72 − 2 − (answer space) = (answer space)

Answer: 6, 64

  1. 72 − 2 = 70 (back to a ten)
  2. 70 − 6 = 64
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