Bonjour, pouvez-vous m’aider svp avant 13h30 si possible ? A=1 - 2/7 + 2/7 + 2/7 : 7/14 B= 2/3 + -11/6 ——————- 3 x 4/9 C= 4 - (1/30 - 1/6) : 1/3 D= 7/3 - 10/3 x

Bonjour

A=1 - 2/7 + 2/7 + 2/7 : 7/14

A = 1 - 2/7 + 2/7 + 2/7 x 14/7

A = 1 - 2/7 + 2/7 + 28/49

A= (1 x 7) / (1 x 7) + 4/7 + (7 x 4) / (7 x 7)

A = 7/7 + 4/7 + 4/7

A = 15/7

B=

2/3 + -11/6

——————-

3 x 4/9

B = [(2 x 2) / (3 x 2) - 11/6] : 12/9

B = (4/6 - 11/6) : 12/9

B = - 7/6 x 9/12

B = - 63/72

B = (9 x - 7) / (9 x 8)

B = - 7/8

C= 4 - (1/30 - 1/6) : 1/3

C = 4 - [1/30 - (1 x 5) / (6 x 5)] : 1/3

C = 4 - (1/30 - 5/30) : 1/3

C = 4 - (- 4/30) : 1/3

C = 4 - (- 4/30) x 3

C = 4  + 12/30

C = (4 x 30) / (1 x 30) + 12/30

C = 120/30 + 12/30

C = 132/30

C = (6 x 22) / (6 x 5)

C = 22/5

D= 7/3 - 10/3 x 28/35

D = 7/3 - 280/105

D = 7/3 - (35 x 8) / (35 x 3)

D = 7/3 - 8/3

D = - 1/3

E= 7/8 x 16/14 - 4/5

E = 112/112 - 4/5

E = 1 - 4/5

E = (1 x 5) / (1 x 5) - 4/5

E = 5/5 - 4/5

E = 1/5.