Réponses

2014-09-09T20:19:56+02:00
A= 4/3.× 9/5 - 3/2 
A = 4 x 9 / 3 x 5 - 3/2
A = 36 / 15 - 3/2
A = 72 / 30 - 45/30
A = 27/30 = 9/10

B= 4/3 x (9/5 - 3/2)
B = 4/3 x (18/10 - 15/10)
B = 4/3 x 3/10
B = 4 x 3 / 3 x 10
B = 12/30 = 2/5