Réponses

2013-04-03T17:29:24+02:00
Si le calcul de base est: (3/2+3/5)(5/4-4/3) alors c'est égale a (15/10+6/10)(15/12-16/12)
=16/10-1/12=96/60-5/60=91/60
2013-04-03T17:36:27+02:00

(3/2+3/5)(5/4-4/3)=(3*5/2*5+3*2/5*2)(5*3/4*3-4*4/4*3)

                                 = (21/10)*-1/12

                                 = 7/40

 

(4*2/3*2)-(5*3/2*3)= 8/6-(-15/6)= 23/6

-2/3+3/4= -2*4/3*4 + 3*3/4*3 = -1/12

23/6 / -1/12 = 23/6*12 = 276/6=46