Réponses

2014-04-28T19:13:50+02:00
Ex 1
1=
x = fois
A= 2/9 - 3/4 x 5/2 = 2/9 - 15/8 = - 119/72 
B= (2/9 - 3/4) x 5/2 = - 19 x 5/ 36 x 2 = - 95/72
C= 2/9 - 3/4 : 5/2 = 3:5/4:9  = 2/9 - 3/10 = 11/30 
D= (2/9 - 3/4) : 5/2 = - 19 :5 /36 : 2  = - 19/90 
je pense