Réponses

2012-09-18T16:42:45+02:00

2x(-1/3) = -2/3

 

1/6+5/6(1/4-5/12) = 1/6 + 5/6*1/4 - 5/6*5/12 = 1/6 + 5/24 - 25/72

 

1/6 + 5/24 - 25/72= 12/72 + 15/72 - 25/72 = 27/72 - 25/72 = 2/72 = 1/36