Bonjour,
Effectuer les calculs suivant et donner le résultat en fraction irréductible :
A= 3 x 7/5
A = 21/5
B= 8/7 x 2
B = 16/7
C= -5 x 4/3
C = - 20/3
D= 6 x -3/11
D = - 18/11
E= 15/8 x 1/5
E = 15/40
E = (5 x 3) / (5 x 8)
E = 3/8
F= 9/17 x 34/5
F = 306/85
F = (17 x 18) / (17 x 5)
E = 18/5
G= 8/9 x 7/2
G = 56/18
G = (2 x 28) / (2 x 9)
G = 28/9
H= 12/21 x 7/9 x 1/3
H = 84/189 x 1/3
H = 84/567
H = (21 x 4) / (21 x 27)
H = 4/27
I= 130/18 x 5/10 x 9/2
I = 650/180 x 9/2
I = 5 850/360
I = (90 x 65) / (90 x 4)
I = 65/4
J= 15/3 x 9 x 21/30
J = 135/3 x 21/30
J = 2 835/90
J = (45 x 63) / (45 x 2)
J = 63/2.