Let's calculate: $-\frac{1}{2}\times -4$

ⓘTwo minus signs cancel out, the product of two negative numbers is positive

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

ⓘ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 the number $2$: $\frac{4}{2}$ = $\frac{2\times 2}{1\times 2}$ = $\frac{2}{1}$

$2$

▷Answer:   $2$