Question

calculati: (1 supra 2-1 supra 4):(-1 supra 8)

Answer 1

(1/2- 1/4): (-1/8)= (2/4-1/4)·(-8/1)=(1/4)·(-8/1)= -2
La scadere am adus la numitor comun amplificand cu 2 prima fractie

Answer 2

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