Réponses

2013-03-15T16:15:18+01:00
47

A = 1/4+1/2+1/4 = 1/4+2/4+1/4 = 4/4 = 2/2

B = 1/4+1/2x1/4 = 1/4+1/8 = 2/8+1/8 = 3/8

C = 9/4x3/2x1/2 = 27/8x1/2 = 27/16

D = 9/4-3/2+1/2 = 9/4-6/4+2/4 = 3/4+2/4 = 5/4

E = 1/2x(1/5+2/3) = 1/2x(3/15+10/15) = 1/2x13/15 = 13/30

F = (3/5+6/5)x(1/4+1/4) = 9/5x2/4 = 18/20 = 9/10

Désolé, je eux seulement t'aider pour le 47 ! :D