Question

Efectuati: a) (+2supra3) + (-1supra2) =

Answer 1

$( + \frac{2}{3} ) + ( - \frac{1}{2} ) = \frac{2}{3} - \frac{1}{2} = \frac{4}{6} - \frac{3}{6} = \frac{1}{6}$

Answer 2

$\frac{2}{3} + ( \frac{ - 1}{2} ) = \frac{2}{3} - \frac{1}{2} \: \: \: aducem \: la \: acelasi \: numitor \\ \\ \frac{4}{6} - \frac{3}{6} = \frac{1}{6}$