Respostas

2014-05-06T10:40:26-03:00
2014-05-06T10:40:41-03:00
80÷(2 x 4 + 2) -7 (20÷10 +10) ÷( 5 x 2 + 2)=
80÷10 -7 x 12 ÷ 12 =
8 - 7 x 1 =
8 - 7= 1