pouvez vous m aider svp merci​

Bonjour,

A= 15/7

B= -6/4 = -3/2

C= 3/3 +2/3 = 5/3

D= 15/11 - 44/11 = -29/11

A= 4/6 +3/6 = 7/6

B= 10/6 - 1/6 = 9/6 = 3/2

C= 21/15 - 35/15 = -14/15

D= 15/100 + 16/100 = 31/10

E= -6/21 +5/21 =  -1/21

F= -4/36 - 21/36 = -25/36