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VTMO 2017 — Grade 2 — final Question 1

VTMO · VTMO 2017 — Grade 2 — final

Question 1

Calculate $99 - 89 + 88 - 78 + 77 - 67 + 66 - 56$.
  1. $22$
  2. $30$
  3. $40$
  4. $42$
  5. $46$