Bonjour :) Cette exercice me pose problème..les calculs numériques .. Le voilà ! C's urgent svp.. D=4 sur 15 + 2 sur 5 E=1sur3 + 1 F=-3sur 7 - 1 sur 14 G=2- -3s

D=4/15 + 2/5 
D = 4/15 + 2 x 3 / 5 x 3
D = 4/15 + 6/15
D = 10/15
D = 5 x 2 / 5 x 3
D = 2/3

E=1/3 + 1
E = 1/3 + 1 x 3 / 1 x 3
E = 1/3 + 3/3
E = 4/3

F=-3/7 - 1/14
F = - 3 x 2 / 7 x 2 - 1/14
F = - 6/14 - 1/14
F = - 7/14
F = 7 x - 1 / 7 x 2
F = - 1/2

G=2- -3/1
G = 2 + 3
G = 5

H=2/9 + 1/6
H = 2 x 6 / 9 x 6 + 1 x 9 / 6 x 9
H = 12/54 + 9/54
H = 21/54
H = 3 x 7 / 3 x 18
H = 7/18

I=9/15- -7/10
I = 9/15 + 7/10
I = 9 x 10 / 15 x 10 + 7 x 15 / 10 x 15
I = 90/150 + 105/150
I = 195/150
I = 15 x 13 / 15 x 10
I = 13/10

J=-8 + 1/4
J = 8 x 4 / 1 x 4 + 1/4
J = 32/4 + 1/4
J = 33/4

K=5/30 + 2/5
K = 5/30 + 2 x 6 / 5 x 6
K = 5/30 + 12/30
K = 17/30

L=-1/14 + -2/21
L = - 1 x 3 / 14 x 3 - 2 x 2 / 21 x 2
L = - 3/42 - 4/42
L = - 7/42
L = 7 x - 1 / 7 x 6
L = - 1/6

M=3/14 - 2/21
M = 3 x 3 / 14 x 3 - 2 x 2 / 21 x 2
M = 9/42 - 4/42
M = 5/42

N=5/18 + 1/27
N = 5 x 3 / 18 x 3 + 1 x 2 / 27 x 2
N = 15/54 + 2/54
N = 17/54

O=1/24 - -1/30
O = 1/24 + 1/30
O = 1 x 5 / 24 x 5 + 1 x 4 / 4 / 30 x 4
O = 5/120 + 4/120
O = 9/120
O = 3 x 3 / 3 x 40
O = 3/40

P=-1/9+1/-15
P = - 1/9 - 1/15
P = - 1 x 5 / 9 x 5 - 1 x 3 / 15 x 3
P = - 5/45 - 3/45
P = - 8/45

G=19/42 + 2/21 - 1/3
G = 19/42 + 2 x 2 / 21 x 2 - 1 x 14 / 3 x 14
G = 19/42 + 4/42 - 14/42
G = 9/42
G = 3 x 3 / 3 x 14
G = 3/14

R=17/42 + 2/21 - 1/3
R = 17/42 + 4/2 - 14/42
R = 7/42
R = 7 x 1 / 7 x 6
R = 1/6

S=8/35 - -2/35
S = 8/35 + 2/35
S = 10/35
S = 5 x 2 / 5 x 7
S = 2/7

T=3/8 - 2 - -1/8
T = 3/8 - 2 + 1/8
T = 3/8 - 2 x 8 / 1 x 8 + 1/8
T = 3/8 - 16/8 + 1/8
T = - 12/8
T = 4 x - 3 / 4 x 2
T = - 3/2

U=7/3 x 27/14
U = 189/42
U = 21 x 9 / 21 x 2
U = 9/2

V=-8/5 x -15/16
V = 120/80
V = 40 x 3 / 40 x 2
V = 3/2

W=3/4 : -9/40
W = 3/4 x - 40/9
W = - 120/36
W = 12 x - 10 / 12 x 3
W = - 10/3