Bonsoir
Réponse :
A = 51/15
B = 15/4
C = -3/14
D = 28/45
E = 35
F = 3/14
G = -8/15
H = -6/5
I = -6/5
J = -7/4
K = -5/6
Explications étape par étape :
À = 7/5 + 6/3
A = (7 x 3)/(5 x 3) + (6 x 5)/(3 x 5)
A = 21/15 + 30/15
A = 51/15
B = 5 - 5/4
B = (5 x 4)/4 - 5/4
B = 20/4 - 5/4
B = 15/4
C = -5/14 + 1/7
C = -5/14 + (1 x 2)/(7 x 2)
C = -5/14 + 2/14
C = (-3/14)
D = 4/5 x 7/9
D = (4 x 7)/(5 x 9)
D = 28/45
E = 14/6 x 15
E = (2 x 7)/(2 x 3) x 15
E = 7/3 x 15
E = 15/3 x 7
E = (5 x 3)/3 x 7
E = 5 x 7
E = 35
F = -3/10 x -15/21
F = 3/10 x 15/21
F = 3/21 x 15/10
F = 3/(7 x 3) x (3 x 5)/(2 x 5)
F = 1/7 x 3/2
F = (1 x 3)/(2 x 7)
F = 3/14
G = 4/5 : (-3/2)
G = 4/5 x -2/3
G = (-2 x 4)/(5 x 3)
G = -8/15
H = 10/7 / (-25/21)
H = 10/7 x -21/25
H = -21/7 x 10/25
H = (-3 x 7)/7 x (5 x 2)/(5 x 5)
H = -3 x 2/5
H = (-3 x 2)/5
H = -6/5
I = 2 : -5/3
I = 2 x -3/5
I = (2 x (-3))/5
I = -6/5
J = (4/3 + 1)/(2/3 - 2)
J = (4/3 + 3/3)/(2/3 - (2 x 3)/3)
J = 7/3 / (2/3 - 6/3)
J = 7/3 / (-4/3)
J = 7/3 x -3/4
J = -3/3 x 7/4
J = -7/4
K = 1/2 - 3/4 x 16/9
K = 1/2 - 16/4 x 3/9
K = 1/2 - (4 x 4)/4 x 3/(3 x 3)
K = 1/2 - 4 x 1/3
K = 1/2 - 4/3
K = (1 x 3)/(2 x 3) - (4 x 2)/(3 x 2)
K = 3/6 - 8/6
K = -5/6
