Réponses

2013-11-06T19:40:57+01:00
G=3/2 -1/5x25/7
=3/2-25/35
=3/2-5/7
=21/14-10/14
=11/14

H=(2/8 - 3/15) :3/10
=(1/4-3/15)*10/3
=(15/60-12/60)*10/3
=3/60*10/3
=10/60
=1/6

 I=  5/4 +2/5
   ---------------
    2 -7/5    
=(5/4+2/5)/(2-7/5)
=(25/20+8/20)/(10/5-7/5)
=(33/20)/(3/5)
=33/20*5/3
=(11*5)/20
=11/4