on donne : a=3/5; b=15;c=10/3 calcul A ) 5a-b+3c B) abc C) ab-4ac D)3+bc

A= 5X3/5-15+3X10/3

A= 3-15+10

A= -2

B= 3/5X15X10/3

B=3X10

B=30

C= 3/5X15-4X3/5X10/3

C=9-8

C=1

D= 3+15X10/3

D=3+5X10

D=53