Respostas

2014-04-09T17:14:28-03:00
Bem simples :
7*6*5!/5!*2!
cancelando o 5! ,fica :
7*6/2=
42/2=
11

1 5 1
2014-04-09T17:23:54-03:00
Bem simples :
7*6*5!/5!*2!
cancelando o 5! ,fica :
7*6/2=
42/2=
11