hey voila l exercice merci

Bonjour,

A=

-2/5 * 15/3 = -30/15  

= -30/15 +2/15 = -28/15

B=

(4*1)/(5*4) = 4/20  = 2/10 = 1/5

1/5 + 2/5 = 3/5

C=

1/3 - 4/3 = -3/3 = -1

-1*2/5 =

(-1 *2) /5 = -2/5