BONJOUR , calculer : A=2- 25/9 B=2/7 - 7 C=-5/3- 10 D=11/9 - 5/4 + 5 E=-5/3 - 5/6 - 5/9 merci

Bonsoir,

Calculer :

A=2- 25/9

A = (2 x 9) / (1 x 9) - 25/9

A = 18/9 - 25/9

A = - 7/9

B=2/7 - 7

B = 2/7 - (7 x 7) / (1 x 7)

B = 2/7 - 49/7

B = - 47/7

C=-5/3- 10

C = - 5/3 - (10 x 3) / (1 x 3)

C = - 5/3 - 30/3

C = - 35/3

D=11/9 - 5/4 + 5

D = (11 x 4) / (9 x 4) - (5 x 9) / (4 x 9) + (5 x 36) / (1 x 36)

D = 44/36 - 45/36 + 180/36

D = 179/36

E=-5/3 - 5/6 - 5/9

E = (- 5 x 6) / (3 x 6) - (5 x 3) / (6 x 3) - (5 x 2) / (9 x 2)

E = - 30/18 - 15/18 - 10/18

E = - 55/18.