Respostas

2014-08-21T00:44:32-03:00
1-1
------
3-1

0
------
2

=0

se for assim

2014-08-21T01:12:19-03:00
( 1 - 1 ) / ( 3 ) ÷ ( 3 - 1 ) / ( 5 )

0 / 3 ÷ 2 / 5

0 / 3 • 5 / 2

0 / 6 = 0