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TIMO 2021 Grade 5 Preliminary Set 1 Question 9

TIMO · TIMO 2021 Grade 5 Preliminary Set 1

Question 9

Find the value of $2020-2000+1980-1960$+...+$60-40+20-0$.

Question illustration
  1. 1000
  2. 1020
  3. 2040
  4. 2000