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VTMO 2013 — Grade 5 — semifinal Question 1

VTMO · VTMO 2013 — Grade 5 — semifinal

Question 1

Which replacement for * makes $1 + 1 \cdot 1 - 2 = 100$ true?
  1. +
  2. −
  3. $\times$
  4. $0$
  5. $1$