Réponses

2013-02-11T08:50:02+01:00

A) 2/3-2/3*9/5= 2/3-18/15 = 10/15-18/15 = -8/15

 

B)(1/6-1/3) : (2/5*3/4) = (1/6-2/6) : (6/20) = -1/6 : 6/20 = -1/6 * 20/6 = -20/36 = - 5/9

 

2013-02-11T08:58:38+01:00

2/3 -2/3 X 9/5 = 2/3 -18/15 = 10/15 -18/15 = -8/15

(1/6-1/3)    = 1/6 - 2/6 = -1/6 X 20/6 = - 20/36 = - 10/18 = - 5/9

(2/5 X 3/4)     6/20