Question

calcule as expressões: a) 18-1+2•(-3)-6 b) √64-2² -2-2²

Answer 1

$a) \: 18 - 1 + 2 \times ( - 3) - 6 \\ 18 - 1 - 6 - 6 \\ 17 - 6 - 6 \\ 11 - 6 \\ 5$
$b) \sqrt{64 }- 2 {}^{2} - 2 - 2 {}^{2} \\ 8 - 4 - 2 - 4 \\ 4 - 2 - 4 \\ 2 - 4 \\ - 2$