If ‘+’ means ‘×’, ‘×’ means ‘-’, ‘-’ means ‘÷’ and ‘÷’ means ‘+’, then:
16 + 4 × 18 - 2 ÷ 2 = ?

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1. Replace signs: '+' → '×', '×' → '-', '-' → '÷', '÷' → '+'. So the expression becomes $16 	imes 4 - 18 \div 2 + 2$.
2. Do multiplication and division first: $16 	imes 4 = 64$ and $18 \div 2 = 9$.
3. Now do left-to-right: $64 - 9 + 2 = 55 + 2 = 57$.
4. The value is 57. FINAL_ANSWER: b

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