De l’aide s’il vous plaît pour mon devoirs merci ):

Bonjour,

A = 1/5 x - 4/3 + 7/2

A = - 4/15 + 7/2

A = (- 4 x 2) / (15 x 2) + (7 x 15) / (2 x 15)

A = - 8/30 + 105/30

A = 97/30

B = 4/5 : (- 3/7) - 7/10

B = 4/5 x - 7/3 - 7/10

B = - 21/15 - 7/10

B = (- 21 x 10) / (15 x 10) - (7 x 15) / (10 x 15)

B = - 210/150 - 105/150

B = - 315/150

B = (15 x - 21) / (15 x 10)

B = - 21/10.

C = 13/7 + (- 8/7) : (- 4/5)

C = 13/7 - 8/7 x - 5/4

C = 13/7 + 40/28

C = (13 x 4) / (7 x 4) + 40/28

C = 52/28 + 40/28

C = 92/28

C = (4 x 23) / (4 x 7)

C = 23/7.

D = 7/3 + 3/2 x - 10/21

D = 7/3 - 30/42

D = (7 x 14) / (3 x 14) - 30/42

D = 98/42 - 30/42

D = 68/42

D = (2 x 34) / (2 x 21)

D = 34/21.

E = 5/8 + (- 3/4) : (- 9/16)

E = 5/8 - 3/4 x - 16/9

E = 5/8 + 48/36

E = 5/8 + (12 x 4) / (12 x 3)

E = 5/8 + 4/3

E = (5 x 3) / (8 x 3) + (4 x 8) / (3 x 8)

E = 15/24 + 32/24

E = 47/24

F = 6/5 - (- 1/9) x (- 3/4)

F = 6/5 - 3/36

F = 6/5 - (3 x 1) / (3 x 12)

F = 6/5 - 1/12

F = (6 x 12) / (5 x 12) - (1 x 6) / (12 x 6)

F = 72/60 - 6/60

F = 66/60

F = (6 x 11) / (6 x 10)

F = 11/10.