Respostas

2014-03-10T17:44:33-03:00
20-80 / 2
10-40/ 2
5-20/2
5-10/2
5-5/5
1-1 / 80

2014-03-10T17:50:48-03:00
20,80/2=10,40
10,40/2=5,20
5,20/2=5,10
5,10/2=5,5
5,5/5=1,1 
=)