Bonsoir,
A = - 5/7 - (3/2 - 5/4)
A = - 5/7 - [(3 x 2) / (2 x 2) - 5/4]
A = - 5/7 - (6/4 - 5/4)
A = 5/7 - 1/4
A = (5 x 4) / (7 x 4) - (1 x 7) / (4 x 7)
A = 20/28 - 7/28
A = 13/28
B = - 5/8 : 5/12
B = - 5/8 x 12/5
B = - 60/40
B = (20 x - 3) / (20 x 2)
B = - 3/2
C = - 28/27 x 36/14
C = - 1 008/378
C = (126 x - 8) / (126 x 3)
C = - 8/3
D = 4/3 + 7/6 x - 2/5
D = 4/3 - 14/30
D = (4 x 10) / (3 x 10) - 14/30
D = 40/30 - 14/30
D = 26/30
D = (2 x 13) / (2 x 15)
D = 13/15
E = (8/15 - 2/5) x (3 + 9/2)
E = [8/15 - (2 x 3) / (5 x 3)] x [(3 x 2) / (1 x 2) + 9/2]
E = (8/15 - 6/15) x (6/2 + 9/2)
E = 2/15 x 15/2
E = 30/30
E = 1
F = 14/25 : 7/- 15
F = 14/25 x - 15/7
F = - 210/175
F = (35 x - 6) / (35 x 5)
F = - 6/5
G = - 8 + 1/8
G = (- 8 x 8) / (1 x 8) + 1/8
G = - 64/8 + 1/8
G = - 63/8
H = 7/3 - 4/3 : 8/5
H = 7/3 - 4/3 x 5/8
H = 7/3 - 20/24
H = (7 x 8) / (3 x 8) - 20/24
H = 56/24 - 20/24
H = 36/24
H = (12 x 3) / (12 x 2)
H = 3/2
I = (5/4 - 2/3) / (- 9/4 + 1/6)
I = [(5 x 3) / (4 x 3) - (2 x 4) / (3 x 4)] / [(- 9 x 3) / (4 x 3) + (1 x 2) / (6 x 2)]
I = (15/12 - 8/12) / (- 27/12 + 2/12)
I = 7/12 : - 25/12
I = 7/12 x - 12/25
I = - 84/300
I = (12 x - 7) / (12 x 25)
I = - 7/25.
