Bonjour pouvez-vous m’aider à c’est exercice svp

Bonjour,

A = - 5/6 + 1/18

A = (- 5 x 3) / (6 x 3) + 1/18

A = - 15/18 + 1/18

A = - 14/18

A = (2 x - 7) / (2 x 9)

A = - 7/9

B = 1/4 + 3/4 x 1/9

B = 1/4 + 3/36

B = (1 x 3) / (4 x 3) + (3 x 1) / (3 x 12)

B = 3/12 + 1/12

B = 4/12

B = (4 x 1) / (4 x 3)

B = 1/3

C = - 15/7 x - 4/5

C = 60/35

C = (5 x 12) / (5 x 7)

C = 12/7

D = 7/24 - 1/8

D = 7/24 - (1 x 3) / (8 x 3)

D = 7/24 - 3/24

D = 4/24

D = (4 x 1) / (4 x 6)

D = 1/6

E = 5/34 x (3/8 - 4/5)

E = 5/34 x [(3 x 5) / (8 x 5) - (4 x 8) / (5 x 8)]

E = 2/34 x (15/40 - 32/40)

E = 2/34 x (- 17/40)

E = - 34/1 360

E = (34 x - 1) / (34 x 40)

E = - 1/40.

F = 4/5 - 5/3 x 25/9

F = 4/5 - 125/27

F = (4 x 27) / (5 x 27) - (125 x 5) / (27 x 5)

F = 108/135 - 625/135

F = - 517/135