Discussion
If + means ÷, – means ×, ÷ means + and × means –, then 36 × 12 + 4 ÷ 6 + 2 – 3 = ?
Answer: C
Correct answer: 42
Apply the substitutions in place: + becomes \( \div \), – becomes \( \times \), \( \div \) becomes +, and \( \times \) becomes –. The expression \( 36 \times 12 + 4 \div 6 + 2 - 3 \) therefore reads \[ 36 - 12 \div 4 + 6 \div 2 \times 3 = 36 - 3 + 3\times3 = 36 - 3 + 9 = 42. \] The order of operations is applied to the *substituted* signs, not the printed ones - doing the division and multiplication before the subtraction and addition is what makes the two nines appear.
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