Question

$\frac{1}{2} { }^{ - 2} \times \frac{1}{8} {}^{ - 1} \times \frac{1}{4} {}^{ - 1}$
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Answer 1

$\frac{1}{2} - 1 \times \frac{1}{8} - 1 \times \frac{1}{4} - 1 =$

$\frac{1}{2} - \frac{1}{4} \times \frac{1}{4} - 1 =$

$- 1$