Donner le résultat sous la forme d'une fraction la plus simple possible. A= 3/7 x (7/3-5/6) B= 3/7 x 7/3-5/6 C= 12 x (1/3-1/6) D= 12 x 1/3-1/6

A = 3/7 x (14/6 - 5/6)
A = 3/7 x 9/6
A = 27/42 = 9/15

B = 21/21 - 5/6
B = 1 - 5/6
B = 6/6 - 5/6 
B = 1/6 

C = 12 x (2/6 - 1/6)
C = 12 x 1/6
C = 2

D = 4 - 1/6
D = 23/6