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ITMC 2019 Grade 5 National Preliminary set01 Question 2

ITMC · ITMC 2019 Grade 5 National Preliminary set01

Question 2

Find $7+14-21+28+35-42+49+56-63+70+77-84+91+98-105+112+119-126+133+140$.
  1. 607
  2. 588
  3. 441
  4. 345
  5. 315