Réponses

2014-05-02T17:04:37+02:00
Bonjour

A=7/12+5/6    
A = 7/12 + 10/12 = 17/12



B=3/4-1/2x5/6    
B = 3/4 - 5/12
B = 9/12 - 5/12 = 4/12 = 1/3  

 C= (3/4-1/2) : 5/6

C = (3/4 - 2/4) : 5/6
C = 1/4 x 4/2 = 4/8 = 1/2


2014-05-02T17:11:50+02:00