Réponses

2013-04-28T17:15:20+02:00

c) 1/3 + 1/9 - 1/27 = 9/27 + 3/27 - 1/27 = 12/27 - 1/27 = 11/27

 

e) 13/18 + 19/6 - 4/3 = 13/18 + 57/18 - 24/18 = 70/18 - 24/18 = 46/18 = 23/9