Question

2/3+(1/4÷1/2)^ -2×1/5

Answer 1

$\frac{2}{3}+[ ( \frac{1}{4}: \frac{1}{2} )^-^2]. \frac{1}{5}=$

$\frac{2}{3}+[ ( \frac{1^-^2}{4^-^2}: \frac{1^-^2}{2^-^2} )]. \frac{1}{5}=$

$\frac{2}{3}+[ ( \frac{4^2}{1^2}: \frac{2^2}{1^2} )]. \frac{1}{5}=$

$\frac{2}{3}+[ ( \frac{16}{1}: \frac{4}{1} )]. \frac{1}{5}=$

$\frac{2}{3}+[ ( \frac{16}{1}. \frac{1}{4} )]. \frac{1}{5}=$

$\frac{2}{3}+[\frac{16}{4}]. \frac{1}{5}=$

$\frac{2}{3}+\frac{16}{20}=$

$\frac{40+48}{60}=$

$\frac{88}{60}= \frac{44}{30}= \frac{22}{15}$