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TIMO 2021 Grade 4 Preliminary Set 1 Question 9

TIMO · TIMO 2021 Grade 4 Preliminary Set 1

Question 9

Find the value of $100-95+90-85+80-75$+...+$10-5$.

Question illustration
  1. 100
  2. 50
  3. 45
  4. 40