Réponses

2014-04-16T16:10:36+02:00
Bonjour ,
B= 8/5 -3/4 /9/8
B= 8/5 - 3/4 x 8/9
B= 8/5 - 3x4x2/ 4x3x3
B= 8/5 -2/3
B= (8x3) -(5x2)/(5x3)
B = 24 -10/15
B= 14/15
C = 8/3-2/5 /7/5
C= 8/3 - 2/5 x 5/7
C= 8/3 -2/7
C =(8x7) -(2x3)/(7x3)
C= 56-6/21
C= 50/21