5/3 x [ -4/5 x (3/12 - 8/12)] = *in paranteza rotunda am adus la acelasi numitor* 5/3 x [ -4/5 x -5/12 ] = 5/3 x [ -48/60 x -25/60 ] = *iar am adus la acelasi numitor* 5/3 x 1200/3600 = 5/3 x 1/2 = 10/6 x 3/6 = *am adus la acelasi numitor* 30/36 = 5/6
