If "−" means "+", "÷" means "×", "×" means "+", and "+" means "−", then (18 × 10 + 20) ÷ 8 − 6 = ?

Explanation

Replacing every symbol exactly as printed:

"×" → "+"
"÷" → "×"
"−" → "+"
"+" → "−"

gives:

(18 + 10 − 20) × 8 + 6

Inside the bracket:

18 + 10 − 20 = 8

Therefore:

8 × 8 + 6 = 70