Bonjour,
Effectuer les calculs en donnant le résultat sous forme la plus simplifiée
A=9sur 5 -8sur 7
A = (9 x 7) / (5 x 7) - (8 x 5) / (7 x 5)
A = 63/35 - 40/35
A = 23/35
B=3-9sur4
B = (3 x 4) / (1 x 4) - 9/4
B = 12/4 - 9/4
B = 3/4
C=48sur69 x 23sur96
C = 1 104/6 624
C = (1 104 x 1) / (1 104 x 6)
C = 1/6
D=16sur7 : -12sur21
D = 16/7 x - 21/12
D = - 336/84
D = (84 x 4) / (84 x 1)
D = 84
E=3x7 sur 2
E = 6/7
F=8sur5+3sur4: 9sur8
F = 8/5 + 3/4 x 8/9
F = 8/5 + 24/36
F =8/5 + (12 x 2) / (12 x 3)
F = 8/5 + 2/3
F = (8 x 3) / (5 x 3) + (2 x 5) / (3 x 5)
F = 24/15 + 10/15
F = 34/15.
