Aider moi le 22 s'il vous plait

A = 3/8 + 2/8
A = 5/8

B = 5/8 x 3/8
B = 15/64

C = 11/4 - 3/4
C = 8/4
C = 4 x 2 / 4 x 1
C = 2

D = 4 x 3/5
D = 12/5

a= 5/8     b=15/64=
c=8/4   c=12/5