Réponses

2014-09-04T19:35:57+02:00
A = 1/4 - 3/4
A = 2/4
A = 2 x 1 / 2 x 2
A = 1/2

B = 3/2 - 1/4
B = 3 x 2 / 2 x 2 - 1/4
B = 6/4 - 1/4
B = 5/4

C = 1/2 + 4/3
C = 1 x 3 / 2 x 3 + 4 x 2 / 3 x 2
C = 3/6 + 8/6
C = 11/6

D = 5/ -2 - 3/5
D = - 5/2 - 3/5
D = - 5 x 5 / 2 x 5 - 3 x 2 / 5 x 2
D = - 25/10 - 6/10
D = - 31/10

E = -5/-3 + 2/7
E = 5/3 + 2/7
E = 5 x 7 / 3 x 7 + 2 x 3 / 7 x 3
E = 35/21 + 6/21
E = 41/21

F =  - 1/-6 - 5/-4
F = 1/6 + 5/4
F = 1 x 4 / 6 x 4 + 5 x 6 / 4 x 6
F = 4/24 + 11/24
F = 15/24
F = 3 x 5 / 3 x 8
F = 5/8

G = -2./5 x -3/-7
G = - 6/35

H = 7/-6 x 3/-4
H = - 7/6 x - 3/4
H = 21/24
H = 3 x 7 / 3 x 8
H = 7/8

I = - 9/2 : 3/-5
I = - 9/2 x - 5/3
I = 45/6
I = 3 x 15 / 3 x 2
I = 15/2

J = 1/-8 : -7/-21
J = - 1/8 : 7/21
J = - 1/8 x 21/7
J = - 21/56
J = 7 x - 3 / 7 x 8
J = - 3/8

K = -4/-5 : 7/-13
K = 4/5 : - 7/13
K = 4/5 x - 13/7
K = - 52/35

L = 15/-7 x -14/-3
L = - 15/7 x 14/3
L = - 210/21
L = 21 x - 10 / 21 x 1
L = - 10/1
L = - 10