Let's evaluate: $-\frac{1}{2}\times \left(-4\right)$

ⓘ In a product, two minus signs cancel: multiplying two negative numbers gives a positive number: $-\frac{1}{2}\times \left(-4\right)$ = $\frac{1}{2}\times 4$

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

ⓘ Multiplying a fraction by a number multiplies its numerator: $\frac{1}{2}\times 4$ = $\frac{1\times 4}{2}$ = $\frac{4}{2}$■We simplify the fraction by dividing the numerator and the denominator by $2$, their greatest common divisor: $\frac{4}{2}$ = $2$

▶Result:   $2$

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