Răspuns :
(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
La scadere am adus la numitor comun amplificand cu 2 prima fractie
[tex]( \frac{1}{2} - \frac{1}{4} ) \div ( - \frac{1}{8} )[/tex]
[tex]( \frac{2 - 1}{4} ) \div ( - \frac{1}{8} )[/tex]
[tex] \frac{1}{4} \times \frac{ 8}{ - 1} [/tex]
[tex] \frac{2}{ - 1} = - 2[/tex]