Bonjour aider moi pour cette exercice svp j'ai beaucoup de difficulté en Math Merci d'avance

Bonjour

La prochaine fois merci de recopier les fractions

A = (1 - 5/6) / (1 + 1/6)

A = [(1 x 6) / (1 x 6) - 5/6] / [(1 x 6) / (1 x 6) + 1/6]

A = (6/6 - 5/6) : (6/6 + 1/6)

A = 1/6 : 7/6

A = 1/6 x 6/7

A = 6/42

A = (6 x 1) / (6x 7)

A = 1/7

B = (1/5 - 5/4) : 7/5

B = [(1 x 4) / (5 x 4) - (5 x 5) / (4 x 5)] : 7/5

B = (4/20 - 25/20) : 7/5

B = - 16/20 : 7/5

B = - 16/20 x 5/7

B = - 80/140

B = (20 x - 4) / (20 x 7)

B = - 4/7

C = 5/4 + 11/4 x 20/33

C = 5/4 + 220/132

D = 5/4 + (44 x 5) / (44 x 3)

C = 5/4 + 5/3

C = (5 x 3) / (4 x 3) + (5 x 4)  / (3 x 4)

C = 15/12 + 20/12

C = 35/12

D = 1/12 : (2 - 3/7)

D = 1/12 : [(2 x 7) / (1 x 7) - 3/7]

D = 1/12 : (14/7 - 3/7)

D = 1/12 : 11/7

D = 1/12 x 7/11

D = 7/132

E = 4 - 3/4 x (1/3 - 1/6)

E = 4 - 3/4 x [(1 x 2) / (3 x 2) - 1/6]

E = 4 - 3/4 x (2/6 - 1/6)

E = 4 - 3/4 x 1/6

E = 4 - 3/24

E = (4 x 24) / (1 x 24) - 3/24

E = 96/24 - 3/24

E = 93/24

E = (3 x 31) / (3 x 8)

E = 31/8

F = 3 x 15/9 - 13/5

F = 45/9 - 13/5

F = (45 x 5) / (9 x 5) - (13 x 9) / (5 x 9)

F = 225/45 - 117/45

F = 108/45

F = (9 x 12) / (9 x 5)

F = 12/5.

G = (3/4 - 2/3) : 7/6

G = [(3 x 3) / (4 x 3) - (2 x 4) / (3 x 4)] : 7/6

G = (9/12 - 8/12) : 7/6

G = 1/12 : 7/6

G = 1/12 x 6/7

G = 6/84

G = (6 x 1) / (6 x 14)

G = 1/14

H = (2 + 2/3) : (4/5 - 2/3)

H = [(2 x 3) / (1 x 3) + 2/3] : [(4 x 3) / (5 x 3) - (2 x 5) / (3 x 5)]

H = (6/3 + 2/3) : (12/15 - 10/15)

H = 8/3 : 2/15

H = 8/3 x 15/2

H = 120/6

H = (6 x 20) / (6 x 1)

H = 20.