Réponses

2013-03-21T19:10:57+01:00

7/15 - 2/15 x 9/4

= 7/15 - 18/60

= 28/60 -18/60 = 18/60 = 3/10

2013-03-21T19:17:47+01:00

= 7/15 - 18/60

= 28/60 -18/60 = 18/60 = 3/10