一、口算。
$200×75\% =$
$15 + 150\% =$
$25\% - \frac{1}{7} =$
$92\% + 0.8 =$
$\frac{5}{6}×24\% =$
$0.86 - 30\% =$
$\frac{4}{5} - \frac{3}{8} =$
$63\% + 29\% =$
$0.56 ÷ 0.56\% =$
$16\% ÷ \frac{2}{3} =$
$18\% ÷ 72\% =$
$25\% ÷ \frac{3}{5} =$
$\frac{8}{3}×\frac{9}{64} =$
$1 ÷ 20\% =$
$\frac{3}{5} - \frac{1}{2} =$
$39\% - \frac{1}{5} =$
$100\% - 29.8\% =$
$9.3 ÷ 3\% =$
$50×30\% =$
$2 - 35\% =$
$60\% ÷ \frac{3}{5} =$

$150$
$16.5$
$\frac{3}{28}$
$1.72$
$0.2$
$0.56$
$\frac{17}{40}$
$0.92$
$100$
$0.24$
$0.25$
$\frac{5}{12}$
$\frac{3}{8}$
$5$
$\frac{1}{10}$
$\frac{19}{100}$
$0.702$
$310$
$15$
$1.65$
$1$

二、计算下面各题，能用简便算法的就用简便算法。
$60\% × \frac{1}{6} - 50\% ÷ 5$
$37.5\% × \frac{3}{2} + \frac{5}{8} ÷ \frac{2}{3}$
$\frac{3}{14} × (75\% - 10\% ÷ 2)$
$\frac{13}{12} - (\frac{1}{12} + 20\%)$
$2 - (\frac{7}{12} - 50\%) ÷ 12.5\%$
$(70\% + \frac{5}{6} - 80\%) × 30$

$0$
$1.5$
$\frac{3}{20}$
$\frac{4}{5}$
$\frac{4}{3}$
$22$