Bonjour
Calculer les expressions suivantes et donner le résultat sous forme d'une fraction irréductibles.
A = 12/25 : - 28/15
A = 12/25 x - 15/28
A = - 180/700
A = (20 x - 9) / (20 x 35)
A = - 9/35
B = 18/27 x 11/- 8
B = - 198/216
B = (18 x - 11) / (18 x 12)
B = - 11/12
C = 11/5 - 9/5 x 7/18
C = (11 x 18) / (5 x 18) - 63/90
C = 198/90 - 63/90
C = 135/90
C = (45 x 3) / (45 x 2)
C = 3/2
D = (8/15 - 1/5) : 2/21
D = [8/15 - (1 x 3) / (5 x 3) x 21/2
D = (8/15 - 3/15) x 21/2
D = 5/15 x 21/2
D = 105/30
D = (15 x 7) / (15 x 2)
D = 7/2
E = (2/3 + 1/6) / (1 - 1/3)
E = [(2 x 2) / (3 x 2) + 1/6] / [(1 x 3) / (1 x 3) - 1/3]
E =(4/6 + 1/6) : (3/3 - 1/3)
E = 5/6 : 2/3
E = 5/3 x 3/2
E = 15/6
E = (3 x 5) / (2 x 2)
E = 5/2.
