Respostas

2014-03-21T11:20:41-03:00
2014-03-21T12:15:07-03:00
Olá

 2 + (-6)- ( +5 ) + ( +2)=
2 -6 -5 +2=
2+2 -6 -5=
 4- 11=-7
2 3 2