Respostas

2014-05-10T14:34:52-03:00
10+10x2-√81=
10+20-9=
30-9= 21

Espero ter ajudado!
2 4 2
2014-05-10T14:45:27-03:00
10+10 x 2-√81=
10+20-√81
30-√81=
30-9=
21
2 5 2