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Grade 1 · Reasoning

Grade 1 Reasoning: Number puzzles

Ontario · Reasoning — solve number puzzles

1.

Which number makes this true? 1 + __ = 2

2.

Which number makes this true? __ − 2 = 1

3.

Which number makes this true? 3 + __ = 4

4.

Which number makes this true? __ − 4 = 1

5.

Which number makes this true? 5 + __ = 6

6.

Which number makes this true? __ − 6 = 1

7.

Which number makes this true? 7 + __ = 8

8.

Which number makes this true? __ − 8 = 1

9.

Which number makes this true? 1 + __ = 3

10.

Which number makes this true? __ − 2 = 2

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Answer key

Grade 1 Reasoning: Number puzzles

Ontario · Reasoning — solve number puzzles

Question numbers match the worksheet.

  1. 1.B) 11 + 1 = 2.
  2. 2.D) 33 − 2 = 1.
  3. 3.D) 13 + 1 = 4.
  4. 4.A) 55 − 4 = 1.
  5. 5.C) 15 + 1 = 6.
  6. 6.C) 77 − 6 = 1.
  7. 7.A) 17 + 1 = 8.
  8. 8.B) 99 − 8 = 1.
  9. 9.A) 21 + 2 = 3.
  10. 10.D) 44 − 2 = 2.

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