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  • Utilisateur Brainly
2013-05-09T15:13:37+02:00

A= 1/7-5/7

  =-4/7

 

B=1/2+5/6

   =3/6+5/6

   =8/6

   =4/3

 

C=2/5-3/4

   =8/20-15/20

   =-7/20

 

D=3/4x7/11

   =21/44

 

E=-2/15x 25/6

   =-50/60

   =-5/6

 

F=4/7:5/3

   =4/7 x 3/5

   =12/35