Bonjour j'ai pas compris l'exercice 12 (4e) pouvez-vous m'aidez svp ​

Bonjour,

A = - 24/21 : - 32/14

A = - 24/21 x - 14/32

A = 336/672

A = (336 x 1) / (336 x 2)

A = 1/2

B = 45/- 18 : 15/12

B = - 45/18 x 12/15

B = - 540/270

B = (270 x - 2) / (270 x 1)

B = - 2

C = - 17/27 : - 34/- 21

C = - 17/27 x 21/34

C = - 357/918

C = (51 x - 7) / (51 x 18)

C = - 7/18.

D = 39/- 42 : - 26/56

D = - 39/42 x - 56/26

D = 2 184/1 092

D = (1 092 x 2) / (1 092 x 1)

D = 2.