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TIMO 2021 Grade 3 Preliminary Set 3 Question 9

TIMO · TIMO 2021 Grade 3 Preliminary Set 3

Question 9

Find the value of $1-2+3-4+5-6+7-8+9-10+11-12+13$.

Question illustration
  1. 6
  2. 9
  3. 8
  4. 7