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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.

1.175 + 98 = 175 + 100 − (answer space) = (answer space)

Answer: 2, 273

  1. 175 + 100 = 275
  2. 275 − 2 = 273
2.98 − 49 = 98 − 50 + (answer space) = (answer space)

Answer: 1, 49

  1. 98 − 50 = 48
  2. I took away 1 too many, so add it back: 48 + 1 = 49
3.112 − 6 = 112 − 2 − (answer space) = (answer space)

Answer: 4, 106

  1. 112 − 2 = 110 (back to a ten)
  2. 110 − 4 = 106
4.190 + 99 = 190 + 100 − (answer space) = (answer space)

Answer: 1, 289

  1. 190 + 100 = 290
  2. 290 − 1 = 289
5.118 − 18 = 118 − 20 + (answer space) = (answer space)

Answer: 2, 100

  1. 118 − 20 = 98
  2. I took away 2 too many, so add it back: 98 + 2 = 100
6.133 − 7 = 133 − 3 − (answer space) = (answer space)

Answer: 4, 126

  1. 133 − 3 = 130 (back to a ten)
  2. 130 − 4 = 126
7.193 + 39 = 193 + 40 − (answer space) = (answer space)

Answer: 1, 232

  1. 193 + 40 = 233
  2. 233 − 1 = 232
8.56 − 28 = 56 − 30 + (answer space) = (answer space)

Answer: 2, 28

  1. 56 − 30 = 26
  2. I took away 2 too many, so add it back: 26 + 2 = 28
9.34 − 5 = 34 − 4 − (answer space) = (answer space)

Answer: 1, 29

  1. 34 − 4 = 30 (back to a ten)
  2. 30 − 1 = 29
10.192 + 28 = 192 + 30 − (answer space) = (answer space)

Answer: 2, 220

  1. 192 + 30 = 222
  2. 222 − 2 = 220
11.131 − 18 = 131 − 20 + (answer space) = (answer space)

Answer: 2, 113

  1. 131 − 20 = 111
  2. I took away 2 too many, so add it back: 111 + 2 = 113
12.102 − 7 = 102 − 2 − (answer space) = (answer space)

Answer: 5, 95

  1. 102 − 2 = 100 (back to a ten)
  2. 100 − 5 = 95
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