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Bonjour,
A = 1/2 + 2/3
A = 1 x 3 / 2 x 3 + 2 x 2 / 3 x 2
A = 3/6 + 4/6
A = 7/6
B = 3/5 - 2/7
B = 3 x 7 / 5 x 7 - 2 x 5 / 7 x 5
B = 21/35 - 10/35
B = 11/35
C = - 3/11 + 1/2
C = - 3 x 2 / 11 x 2 + 1 x 11 / 2 x 11
C = - 6/22 + 11/22
C = 5/22
D = - 5/7 - 2/3
D = - 5 x 3 / 7 x 3 - 2 x 7 / 3 x 7
D = - 15/21 - 14/21
D = - 29/21
E = - 9/2 + - 2/11
E = - 9/2 - 2/11
E = - 9 x 11 / 2 x 11 - 2 x 2 / 11 x 2
E = - 99/22 - 4/22
E = - 103/22
F = - - 3/4 + - 1/5
F = 3/4 - 1/5
F = 3 x 5 / 4 x 5 - 1 x 4 / 5 x 4
F = 15/20 - 4/20
F = 11/20
G = - 6/7 + 3
G = - 6/7 + 3 x 7 / 1 x 7
G = - 6/7 + 21/7
G = 15/7
H = 5 - 14/24
H = 5 x 24 / 1 x 24 - 14/24
H = 120/24 - 14/21
H = 106/24
H = 2 x 53 / 2 x 12
H = 53/12
I = - 7/6 + - 5/4
I = - 7/6 - 5/4
I = - 7 x 2 / 6 x 2 - 5 x 3 / 4 x 3
I = - 14/12 - 15/12
I = - 29/12
J = 19/20 - - 4/30
J = 19/20 + 4/30
J = 19 x 3 / 20 x 3 + 4 x 2 / 30 x 2
J = 57/60 + 8/60
J = 65/60
J = 5 x 13 / 5 x 12
J = 13/12
A = 1/2 + 2/3
A = 1 x 3 / 2 x 3 + 2 x 2 / 3 x 2
A = 3/6 + 4/6
A = 7/6
B = 3/5 - 2/7
B = 3 x 7 / 5 x 7 - 2 x 5 / 7 x 5
B = 21/35 - 10/35
B = 11/35
C = - 3/11 + 1/2
C = - 3 x 2 / 11 x 2 + 1 x 11 / 2 x 11
C = - 6/22 + 11/22
C = 5/22
D = - 5/7 - 2/3
D = - 5 x 3 / 7 x 3 - 2 x 7 / 3 x 7
D = - 15/21 - 14/21
D = - 29/21
E = - 9/2 + - 2/11
E = - 9/2 - 2/11
E = - 9 x 11 / 2 x 11 - 2 x 2 / 11 x 2
E = - 99/22 - 4/22
E = - 103/22
F = - - 3/4 + - 1/5
F = 3/4 - 1/5
F = 3 x 5 / 4 x 5 - 1 x 4 / 5 x 4
F = 15/20 - 4/20
F = 11/20
G = - 6/7 + 3
G = - 6/7 + 3 x 7 / 1 x 7
G = - 6/7 + 21/7
G = 15/7
H = 5 - 14/24
H = 5 x 24 / 1 x 24 - 14/24
H = 120/24 - 14/21
H = 106/24
H = 2 x 53 / 2 x 12
H = 53/12
I = - 7/6 + - 5/4
I = - 7/6 - 5/4
I = - 7 x 2 / 6 x 2 - 5 x 3 / 4 x 3
I = - 14/12 - 15/12
I = - 29/12
J = 19/20 - - 4/30
J = 19/20 + 4/30
J = 19 x 3 / 20 x 3 + 4 x 2 / 30 x 2
J = 57/60 + 8/60
J = 65/60
J = 5 x 13 / 5 x 12
J = 13/12
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