A=1/2-5/7 B=1/2+5/6 C=2/5-3/4 D=3/4×7/11 E=-2/15×25/6 F=4/7÷5/3 il faut les calculer sous la forme la plus simple possible

Bonjour,

A = 1/2 - 5/7
A = 1 x 7 / 2 x 7 - 5 x 2 / 7 x 2
A = 7/14 - 10/14
A = - 3/14

B = 1/2 + 5/6
B = 1 x 3 / 2 x 3 + 5/6
B = 3/6 + 5/6
B = 8/6
B = 2 x 4 / 2 x 3
B = 4/3

C = 2/5 - 3/4
C = 2 x 4 / 5 x 4 - 3 x 5 / 4 x 5
C = 8/20 - 15/20
C = - 7/20

D = 3/4 x 7/11
D = 21/44

E = - 2/15 x 25/6
E = - 50/90
E = 10 x - 5 / 10 x 9
E = - 5/9

F = 4/7 : 5/3
F = 4/7 x 3/5
F = 12/35