Réponses

2013-11-14T08:27:31+01:00
L = (3/24 + 14/24) x (6/5 x 15/4)
   = 17/24 x 90/20
   = 17/24 x 9/2 
   = 153/48 = 51/16
2013-11-14T08:30:30+01:00
Le calcul est juste mais il faut encore le simplifier :
51/16 = 3 + 3/16 = 3,1875
K =( -11/24) / (21/12) = - 11/24 * 12/21 = - 11/2 * 1/21 = -11/42
pour le reste des exercices, ta page est illisible, désolée
M = 17/ 24 // 50/60 - 16/60 = 17/24 // 34/60 = 17/5 * 4/16 = 68/80 = 17/20
N= (15/9 - 7/9 ) / (1/4 - 2/4) = 8/9 / -1/4 = 8/9 * -4 = 32/9 = 3 + 5/9