Bonjour pouvez vous m’aider s’il vous plaît

Bonjour !

A = 2/3 + 7/3 * (-9)/4

A = 2/3 + (7*(-9)) / (3*4)

A = 2/3 - 63/12

A = (2*4)/(3*4) - 63/12

A = 8/12 - 63/12

A = (8 - 63) / 12

A = -55/12

B = (2 - 5/8) : 3/4

B = (16/8 - 5/8) * 4/3

B = ((16-5)/8) * 4/3

B = 11/8 * 4/3

B = (11*4) / (8*3)

B = 44/24

B = 11/6

C = (4/5 - 2) * (3/4 - 2/3)

C = (4/5 - 10/5) * [(3*3)/(4*3) - (2*4)/(3*4)]

C = [(4-10)/5] * (9/12 - 8/12)

C = (-6)/5 * (9-8) / 12

C= (-6)/5 * 1/12

C = (-6 * 1) / (5 * 12)

C = -6/60

C = -1/10

D = 2/13 - 5/13 : 10/6

D = 2/13 - 5/13 * 6/10

D = 2/13 - (5*6) / (13*10)

D = 2/13 - 30/130

D = 2/13 - 3/13

D = (2 - 3) / 13

D = -1/13

J'espère t'avoir aidé. Bon courage !