Qui peut m’aider svp

Réponse :

Bonjour

Explications étape par étape

A = (1/8 - 7/12) ÷ (7/6 + 7/16)

A = (3/24 - 14/24) ÷ (56/48 + 21/48)

A = (-11/24) ÷ (77/48)

A = -11/24 * 48/77

A = -11 * 2 * 24 / 24 * 11 * 7

A = -1 *2/7

A = -2/7

B = 1/8 -7/12 ÷ 7/6 + 7/16

B = 1/8 -7/12 × 6/7 + 7/16

B = 1/8 - 7*6/12*7 + 7/16

B = 1/8 - 1/2 + 7/16

B = 2/16 - 8/16 + 7/16

B = 1/16

C = (1/8 + 7/12) * (6/5 ÷ 4/15)

C = (3/24 + 14/24) * ( 6/5*15/4)

C = 17/24 * (3*2*5*3/5*2*2)

C = 17/24 * 9/2

C = 17*3*3/8*3*2

C = 51/16

D = (5/3 - 7/9)/(1/4 - 1/2)

D = (15/9 - 7/9)/(1/4 - 2/4)

D =( 8/9)/(-1/4)

D = 8/9 *( -4)

D = -32/9