Bonjour j ai un devoir en math merci d avznce

Bonjour,

2)

A = 7/9 + 4/9

A = 11/9

B = 1/6 + 11/24

B = (11 x 4) / (6 x 4) + 11/24

B = 44/24 + 11/24

B = 55/24

C = 6 + 7/11

C = (6 x 11) / (1 x 11) + 7/11

C = 66/11 + 7/11

C = 73/11

D = 3/7 + 2/3

D = (3 x 3) / (7 x 3) + (2 x 7) / (3 x 7)

D = 9/21 + 14/21

D = 23/21

E = - 7/25 - - 1/5

E = - 7/25 + 1/5

E = - 7/25 + (1 x 5) / (5 x 5)

E = - 7/25 + 5/25

E = - 2/25

F = 5/2 + 2/- 3

F = 5/2 - 2/3

F = (5 x 3) / (2 x 3) - (2 x 5) / (3 x 5)

F = 15/6 - 10/6

F = 5/6

G = - 11/3 - [2 - (7/2- 5/7)]

G = - 11/3 - [(2 - [(7 x 7) / (2 x 7) - (5 x 2) / (7 x 2]]

G = - 11/3 - [(2 - (49/14 - 10/14)]

G = - 11/3 - (2 - 39/14)

G = - 11/3 - [(2 x 14) / (1 x 14) - 39/14]

G = - 11/3 - (28/14 - 39/14)

G = - 11/3 - (- 11/14)

G = (- 11 x 14) / (3 x 14) + (11 x 3) / (14 x 3)

G = - 154/42 + 33/42

G = - 121/42

3)

A) - 5/9 = - 5 x (- 1/9)

B) 4/- 3 = 4 x (- 1/3)

C) 1/6 x 5 = 5/6