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Sagot :
Bonjour
A = 5/6 + 1/2
A = 5/6 + (1 x 3)/(2 x 3)
A = 5/6 + 3/6
A = 8/6
B = 3/5 + 7/10
B = (3 x 2)/(5 x 2) + 7/10
B = 6/10 + 7/10
B = 13/10
C = 8/3 + 1
C = 8/3 + (1 x 3)/(1 x 3)
C = 8/3 + 3/3
C = 11/3
D = 4 + 3/4
D = (4 x 4)/4 + 3/4
D = 16/4 + 3/4
D = 19/4
E = 5/9 - 2/3
E = 5/9 - (2 x 3)/(3 x 3)
E = 5/9 - 6/9
E = (-1/9)
F = 7/6 - 13/30
F = (7 x 5)/(6 x 5) - 13/30
F = 35/30 - 13/30
F = 22/30
F = (2 x 11)/(2 x 15)
F = 11/15
G = 2 - 4/7
G = (2 x 7)/7 - 4/7
G = 14/7 - 4/7
G = 10/7
H = 8/9 - 5
H = 8/9 - (5 x 9)/9
H = 8/9 - 45/9
H = (-37/9)
exercice :
J = 5/2 + 8/3
J = (5 x 3)/(2 x 3) + (8 x 2)/(3 x 2)
J = 15/6 + 16/6
J = 31/6
K = 4/7 + 1/6
K = (4 x 6)/(7 x 6) + (1 x 7)/(6 x 7)
K = 24/42 + 7/42
K = 31/42
L = 7/4 + 3/5
L = (7 x 5)/(4 x 5) + (3 x 4)/(5 x 4)
L = 35/20 + 12/20
L = 47/20
M = 6/5 + 5/6
M = (6 x 6)/(5 x 6) + (5 x 5)/(6 x 5)
M = 36/30 + 25/30
M = 61/30
N = 2/3 - 1/4
N = (2 x 4)/(3 x 4) - (1 x 3)/(4 x 3)
N = 8/12 - 3/12
N = 5/12
P = 3/7 - 7/8
P = (3 x 8)/(7 x 8) - (7 x 7)/(8 x 7)
P = 24/56 - 49/56
P = (-25/56)
R = 8/9 - 1/2
R = (8 x 2)/(9 x 2) - (1 x 9)/(2 x 9)
R = 16/18 - 9/18
R = 7/18
S = 11/10 - 4/3
S = (11 x 3)/(10 x 3) - (4 x 10)/(3 x 10)
S = 33/30 - 40/30
S = (-7/30)
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