一、口算。
$69\% ÷ 0.23 =$
$0.36 × 25\% =$
$60\% × \frac{7}{9} =$
$50\% × 0.8 =$
$80\% ÷ \frac{5}{9} =$
$4.8 ÷ 12\% =$
$75\% × \frac{8}{15} =$
$\frac{5}{7} × 84\% =$
$\frac{2}{3} - 15\% =$
$60\% × \frac{2}{3} =$
$\frac{5}{8} + 25\% =$
$145\% × 2 =$
$20\% ÷ \frac{4}{9} =$
$9 ÷ 75\% =$
$87.5\% × 2 =$
$\frac{2}{9} × 5\% =$
$\frac{5}{6} - 20\% =$
$\frac{5}{7} ÷ 20\% =$
$\frac{3}{8} × 160\% =$
$37.5\% ÷ 25\% =$
$90\% + 60\% =$

$3$
$0.09$
$\frac{7}{15}$
$0.4$
$\frac{36}{25}$
$40$
$\frac{2}{5}$
$\frac{3}{5}$
$\frac{31}{60}$
$\frac{2}{5}$
$\frac{7}{8}$
$2.9$
$\frac{9}{20}$
$12$
$1.75$
$\frac{1}{90}$
$\frac{19}{30}$
$\frac{25}{7}$
$\frac{3}{5}$
$1.5$
$1.5$

二、计算下面各题，能用简便算法的就用简便算法。
$125\% × \frac{5}{6} + \frac{1}{6} × 125\%$
$\frac{8}{15} × 75\% - \frac{1}{6} ÷ 50\%$
$\frac{7}{8} ÷ [ (50\% + 60\%) × \frac{5}{11} ]$
$35 × 99\%$
$(25\% - \frac{1}{9}) × 4 × 9$
$360\% × 3.9 + 6.1 × 3\frac{3}{5}$

$\frac{5}{4}$
$\frac{1}{15}$
$\frac{7}{4}$
$34.65$
$5$
$36$