Bonjour
Calculer les expressions suivantes en détaillant les étapes de calcul :
A = (2/3 + 5/3) x - 6/5
A = 7/3 x - 6/5
A = - 42/15
A = (3 x - 14) / (3 x 5)
A = - 14/5
B = 5/14 x (2/15 - 1/3)
B = 5/14 x [2/15 - (1 x 5) / (3 x 5)]
B = 5/14 x (2/15 - 5/15)
B = 5/14 x - 3/15
B = - 15/210
B = (15 x - 1) / (15 x 14)
B = - 1/14
C = 11/8 + 7/18 x 2/7
C = 11/8 + 14/126
C = 11/8 + (14 x 1) / (14 x 9)
C = 11/8 + 1/9
C = (11 x 9) / (8 x 9) + (1 x 8) / (9 x 8)
C = 99/72 + 8/72
C = 107/72
D = 7/15 - 2/15 x 9/4
D = 7/15 - 18/60
D = (7 x 4) / (15 x 4) - 18/60
D = 28/60 - 18/60
D = 10/60
D = (10 x 1) / (10 x 6)
D = 1/6.
