Réponses

2012-09-23T12:23:41+02:00

A= 2/3 + 5/6 

= 4/6 + 5/6

= 9/6

= 3/2

 

B = 3/4 * 2/9

= 6/36

= 1/6

 

C = 2/5 : 4/7

= 2/5 * 7/4

= 14/20

= 7/10

 

En espérant t'avoir aidé.