Réponses

  • Utilisateur Brainly
2013-05-01T13:39:48+02:00

A=(7/3-2/3 )/( 8/7)

   =(5/3)/(8/7)

   =5/3*7/8

   =35/24

 

B=(0,3x10²x5x10^(-3))/(4*10^(-4))

   =0,3*5/4*10^(2-3+4)

   =0,375*10^3

   =375