Bonjour je bloque sur l'exercice numéro 1 pouvez vous m'aider svp merci.

Bonsoir,

Effectuer les calculs en détaillant toutes les étapes :

A = (-2/3) + 2/5 x 1/2
A = -2/3 + 2/2 x 1/5
A = -2/3 + 1/5
A = -10/15 + 3/15
A = -7/15

B = (3/7 - 2) x (-5/11)
B = (3/7 - 14/7) x (-5/11)
B = (-11/7) x (-5/11)
B = -11/-11 x 5/7
B = 5/7

C = 7/9 - 1/6 x 5
C = 7/9 - 5/6
C = (7 x 2)/(9 x 2) - (5 x 3)/(6 x 3)
C = 14/18 - 15/18
C = -1/18

D = 15/(-14) x (-7/20)
D = 7/14 x 15/20
D = (1 x 7)/(2 x 7) x (3 x 5)/(4 x 5)
D = 1/2 x 3/4
D = 3/8

E = (-4/7 + 1/4) x (-2/3 - 6/5)
E = (-16/28 + 7/28) x (-10/15 - 18/15)
E = -9/28 x -28/15
E = 28/28 x 9/15
E = (3 x 3)/(3 x 5)
E = 3/5

F = 5/9 - 1
F = 5/9 - 9/9
F = -4/9

G = 1/2 + 1/3 + 1/4
G = 12/24 + 8/24 + 6/24
G = 26/24
G = (2 x 13)/(2 x 12)
G = 13/12

H = -2/3 x 3/4 x -4/5 x 5/(-6)
H = -3/3 x 2/4 x -5/5 x 4/-6
H = -1/2 x 2/3
H = -2/2 x 1/3
H = -1/3

I = 2 - 2/3 x 5
I = 2 - 10/3
I = 6/3 - 10/3
I = -4/3

J = (-1 + 1/3) x 9/(-4)
J = (-3/3 + 1/3) x -4/9
J = -2/3 x -4/9
J = 8/27