ATIVIDADE EXTRA - A
67-{50-[70:(27+8)+18:2]+21} =
67-{50-[70:(35) + 9] +21} =
67-{50- [2 +9] + 21 =
67-{50-[11]+21} =
67-{50-11+21} =
67-{71-11} =
67-{60} =
67 - 60 =
7
67-{50-[70:(35) + 9] +21} =
67-{50- [2 +9] + 21 =
67-{50-[11]+21} =
67-{50-11+21} =
67-{71-11} =
67-{60} =
67 - 60 =
7
ATIVIDADE EXTRA - B
{10 + [ 5 x (4 + 2 x 5) - 8 ] x 2} -100
{10+[5.14-8].2}-100
{10+62.2}-100
{10+124}-100
134-100
34
{10+[5.14-8].2}-100
{10+62.2}-100
{10+124}-100
134-100
34