一、计算下面各题。
$326 - (280\div32 + 11.25)$ $(1 - 0.14\times0.5)\div0.03$ $(11.5 - 4)\times(0.76\div1.9)$
$(3.7 - 0.06)\times(3 - 0.2)$ $\frac{1}{3}\times(50\% - 50\times1\%)$ $270\div[18\times(51 - 46)]$
$2 - (\frac{5}{8}\div\frac{15}{28}+\frac{5}{6})$ $(1 - \frac{1}{6}\times\frac{2}{5})\div\frac{7}{9}$ $(\frac{9}{10}+60\%)\times(\frac{2}{9}-\frac{2}{15})$
$\frac{13}{9}\div(\frac{1}{3}\div\frac{1}{4}+\frac{2}{3})$ $6\times(75\%+\frac{1}{8}\div\frac{3}{4})$ $(1.7 - 0.23)\times(2 - 0.2)$
$(1 - 0.3\times0.5)\times0.2$ $\frac{9}{20}\div[\frac{1}{2}\times(\frac{2}{5}+\frac{4}{5})]$ $\frac{7}{33}\div[\frac{1}{8}\div(\frac{3}{4}-\frac{1}{2})]$

306 31 3
10.192 0 3
0 $\frac{6}{5}$ $\frac{2}{15}$
$\frac{13}{18}$ $\frac{11}{2}$ 2.646
0.17 $\frac{3}{4}$ $\frac{14}{33}$