Réponses

Meilleure réponse !
2014-01-12T15:01:03+01:00
D=2/3-(-4/9+7/6)
D=2/3-(-4*2/9*2+7*3/6*3)
D=2/3-(-8/18+21/18)
D=2/3-(13/18)
D=2*6/3*6-13/18
D=12/18-13/18
D=-1/18
2014-01-12T15:03:06+01:00

D = 2/3 - (-4/9 + 7/6)
D = 2/3 - (-4 x 2 / 9 x 2 + 7 x 3 / 6 x 3)
D = 2/3 - (-8/18 + 21/18)
D = 2/3 - (+ 13/18)
D = 2/3 - 13/18
D = 2 x 6 / 3 x 6 - 13/18
D = 12/18 - 13/18
D = -1/18