Réponses

2013-06-05T20:58:42+02:00

D=4/9-2X13+3/13-3

   =4/9-2X16/10

   =4/9-3,2

   =-124/45

 

E=18-16/4/7

  =2/4/7

  =7/2

  =3,5

 

F=(-1/5-2/7)/(1-15/49)

  =(-17/35)/(34/49)

  =-7/10

 

Fini !!

2013-06-05T21:26:30+02:00

D=4/9-2X13+3/13-3

   =4/9-2X16/10

   =4/9-3,2

   =-124/45

 

E=18-16/4/7

  =2/4/7

  =7/2

  =3,5

 

F=(-1/5-2/7)/(1-15/49)

  =(-17/35)/(34/49)

  =-7/10