Effectuer les opérations.

bonjour;

B= (3/3 -1/3) *9/8

= 2/3*9/8

= 18/24

= 3/4

C= 2/3 +1/3*9/8

= 2/3 +9/24

= (2/3 *8/8) +9/24

= 16/24 +9/24

= 25/24

D= 3/3 *9/8

= 27/24

 = 9/8