Réponses

2014-04-03T22:22:23+02:00
A= 45/35 x 8/63
= 9 x 5 x 8 / 7 x 5 x 9 x 7 = 8/49

b= 15/36 x 24/10
  = 5 x 3  x 6 x 2 x 2 / 6 x 6 x5 x 2 = 6/6 = 1

c =15 x 8/35
= 5 x 3 x 4 x 2/ 7 x 5 = 24/7

d) 9/10 x 35/21
 = 3 x 3 x 7 x 5 / 5 x 2 x 7 x 3 = 3/2

e) 15/9 x 24
 = 5 x 3 x 8 x 3/ 3 x 3 = 40