Hola! :3
Resolvemos:
1) (1/2)÷(2/8)=a
(1/2)÷(1/4)=a
(1/2)×(4/1)=a
4/2=a
2=a
2) (2/3)÷(2/9)=b
(2/3)×(9/2)=b
18/6=b
3=b
3) (4/6)÷(2/3)=c
(2/3)÷(2/3)=c
(2/3)×(3/2)=c
6/6=c
1=c
4) (5/8)÷(2/4)=d
(5/8)÷(1/2)=d
(5/8)×(2/1)=d
10/8=d
5/4=d
5) (7/6)÷(1/2)=e
(7/6)×(2/1)=e
14/6=e
7/3=e
Espero haberte ayudado :D
