Bonsoir,
Effectue les opérations suivantes en les simplifiant
A=-2/3+7/4
A = (- 2 x 4) / (3 x 4) + (7 x 3) / (4 x 3)
A = - 8/12 + 21/12
A = 13/12
B=-5/6-1/18
B = (- 5 x 3) / (6 x 3) - 1/18
B = - 15/18 - 1/18
B = - 16/18
B = (2 x - 8) / (2 x 9)
B = - 8/9
C=2/9×(-6/5)
C = - 12/45
C = (3 x - 4) / (3 x 15)
C = - 4/15
D=-7/3÷6/5
D = - 7/3 x 5/6
D = - 35/18
E=2+7/6-7/24+1/8
E = (2 x 24) / (1 x 24) + (7 x 4) / (6 x 4) - 7/24 + (1 x 3) / (8 x 3)
E = 48/24 + 28/24 - 7/24 + 3/24
E = 72/24
E = (24 x 3) / (24 x 1)
E = 3
F=7/8-3/8×11/3+7/6÷(-4)
F = 7/8 - 33/24 + 7/6 x - 1/4
F= (7 x 3) / (8 x 3) - 33/24 - 7/24
F = 21/24 - 33/24 - 7/24
F = - 19/24.
G=1+2/3
4/7-7/1
G = (1 x 3) / (1 x 3) + 2/3
4/7 - (7 x 7) / (1 x 7)
G = 3/3 + 2/3
4/7 - 49/7
G = 5/3 : - 45/7
G = - 225/21
G = (3 x - 75) / (3 x 7)
G = - 75/7.
