Réponses

2014-10-17T16:13:34+02:00
B = 2/3 + 3/10 + -2/5
B = 2x10/(3x10) + 3x3/(3x10) + -2x6/(5x6)
B = 20/30 + 9/30 - 12/30
B = (20+9-12)/30
B = (29-12)/30
B = 17/30
2014-10-17T16:15:09+02:00
20/30 + 9/30 - 12/30 (20+9-12)/30 (29-12)/30 17/30