Respostas

2014-07-14T19:35:30-03:00
  1 542 
       X9
_________
13 878
2X9 = 18 SOBE 1
9X4=36+1=37- SOBE 3
9X5=45+3=48 SOBE 4 
9X1=9+4=13       
 
=13.878

1 1 1