Question

Efetue as operações e simplifique o resultado quando possível:
a) {2/3-[7/2+3/2×(1/2+1/8)]}

Answer 1

    $\frac{2}{3}-[\frac{7}{2}+\frac{3}{2}*(\frac{1}{2}+\frac{1}{8})]=$

$=\frac{2}{3}-[\frac{7}{2}+\frac{3}{2}*(\frac{4}{8}+\frac{1}{8})]=$

$=\frac{2}{3}-[\frac{7}{2}+\frac{3}{2}*\frac{5}{8}]=$

$=\frac{2}{3}-[\frac{7}{2}+\frac{15}{16}]=$

$=\frac{2}{3}-[\frac{56}{16}+\frac{15}{16}]=$

$=\frac{2}{3}-\frac{71}{16}=$

$=\frac{32}{48}-\frac{213}{48}=$

$=-\frac{181}{48}$