math svp aider moi c'est important ❤️​

Réponse :

Explications étape par étape

Bonsoir

Calcul les expressions :

A = -4/7 x -28/-36

A = -4/-36 x -28/7

A = 4/(4 x 9) x (-4 x 7)/7

A = 1/9 x (-4)

A = -4/9

B = 5/2 + (-9/11)

B = 5/2 - 9/11

B = (5 x 11)/(2 x 11) - (9 x 2)/(11 x 2)

B = 55/22 - 18/22

B = (55 - 18)/22

B = 37/22

C = 5 - 1/8 x 12/-3

C = 5 - 1/8 x (3 x 4)/(-3)

C = 5 - 1/8 x (-4)

C = 5 + 4/8

C = 5 + 4/(4 x 2)

C = 5 + 1/2

C = (5 x 2)/2 + 1/2

C = 10/2 + 1/2

C = 11/2