Question
If '+' means '-', '-' means '+', '×' means
'÷', and '÷' means '×', then the value of 42 – 12 × 3 + 8 ÷ 2 + 15 / 8 × 2 – 4 + 9 ÷ 3 is :Solution
42−12×3+8÷2+15/8×2−4+9÷3 On changing the sign, 42+12÷3−8×2−15/8÷2+4−9×3 = 42+4−8×2−15/ 4+4−9×3 = 42+4−16−15/ 4+4−27 = 15/19
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