Bonjour
Calculer et donner le résultat sous la forme d'une fraction irréductible (forme simplifiée)
A= 1/2-3/10×16/9
A = 1/2 - 48/90
A = (1 x 15) / (2 x 15) - (3 x 16) / (3 x 30)
A = 15/30 - 16/30
A = - 1/30
B= (1/5-3/10)×(1/6+1/2)
B = [(1 x 2) / (5 x 2) - 3/10] x [1/6 + (1 x 3) / (2 x 3)]
B = (2/10 - 3/10) x (1/6 + 3/6)
B = - 1/10 x 4/6
B = - 4/60
B = (4 x - 1) / (4 x 15)
B = - 1/15
C= 1/5-3/10×1/6+1/2
C = 1/5 - 3/60 + 1/2
C= (1 x 4) / (5 x 4) - (3 x 1) / (3 x 20) + (1 x 10) / (2 x 10)
C = 4/50 - 1/20 + 10/20
C = 13/20
D= 1/8-7/12÷7/6+7/12
D = 1/8 - 7/12 x 6/7 + 7/12
D = 1/8 - 42/84 + 7/12
D = 1/8 - (42 x 1) / (42 x 2) + 7/12
D = 1/8 - 1/2 + 7/12
D = (1 x 3) / (8 x 3) + (1 x 12) / (2 x 12) + (7 x 2) / (12 x 2)
D = 3/24 + 12/24 + 14/24
D = 29/24
E= (1/8-7/12)÷(7/6+7/16)
E = [(1 x 3) / (8 x 3) - (7 x 2) / (12 x 2)] : [(7 x 8) / (6 x 8) + (7 x 3) / (16 x 3)]
E = (3/24 - 14/24) : (56/48 + 21/48)
E = - 11/24 : 77/48
E = - 11/24 x 48/77
E = - 528/1 848
E = (264 x - 2) / (264 x 7)
E = - 2/7
F= (1/8+7/12)×(6/5÷4/15)
F = [(1 x 3) / (8 x 3) + (7 x 2) / (12 x 2)] x (6/5 x 15/4)
F = (3/24 + 14/24) x 90/20
F = 17/24 x 90/20
F = 1 530/480
F = (30 x 51) / (30 x 16)
F = 51/16.
