三、计算下面各题，怎样简便就怎样计算。
$20\times\frac{3}{7} + 3\div7$ $3.4\times2.81 + 0.66\times28.1$ $13 - 60\times(\frac{1}{5} - \frac{1}{6})$
$4.82 - 5.2\div0.8\times0.6$ $\frac{1}{10}\div\frac{1}{15} + \frac{4}{3}\times\frac{3}{8}$ $\frac{5}{9} + \frac{8}{9} - 0.625 - 0.375$
$2.5\times44$ $45\times(\frac{2}{3} + \frac{7}{15} - \frac{3}{5})$ $5\div\frac{7}{16} + 2\div\frac{7}{16}$
$256 - 36\div15\times102$ $8.2 - 3.2\div0.4 + 0.6$ $37.5\% - \frac{3}{20} + 62.5\% - \frac{17}{20}$
$\frac{3}{4}\times\frac{5}{6} + \frac{1}{6}\div\frac{4}{3}$ $[\frac{5}{6} - (\frac{3}{8} + \frac{1}{6})]\times\frac{8}{9}$ $\frac{3}{5}\times8.8 + 0.6\times\frac{1}{5} + 60\%$

9 28.1 11 0.92 2 $\frac{4}{9}$ 110 24 16 11.2 0.8 0 $\frac{3}{4}$ $\frac{7}{27}$ 6