Respostas

2014-05-06T10:43:19-03:00
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