Réponses

2014-09-24T17:32:34+02:00

Bonjour


a =2/3 - 7/3 x 8/21

a = 2/3 - 56/63

a = 42/63 - 56/63

a = -14/63


 B=(3/4-5/6)*3/2

B = (9/12 - 10/12) x 3/2

B = -1/12 x 3/2

B = -3/24

B = -1/8