Réponses

2012-09-09T17:33:26+02:00

A = -5/4 x 2/3 + 7/10 : 3/5

A = -10/12 + 7/10 * 5/3

A = -10/12 + 35/30

A =  -50/60 + 70/60

A = 20/60

A=  2/6

A = 1/3

 

B = 7/18 x 2/7 - (5/3 - 1)²

B = 2/18 - 25/9 + 10/3 - 1

B = 2/18 - 50/18 + 60/18 - 18/18

B = -6/18

B = -1/3

2012-09-09T17:55:03+02:00

A=-5/4x2/3+7/10/2/5

   =5/6+7/4

   =10/12+21/12

   =31/12

 

B=7/18x2/7-[5/3-1]*2

 =1/9-4/9

=-3/9

=1/3