一、口算。
$8× 37.5\% =$
$\frac{3}{4}÷ \frac{6}{5} =$
$\frac{5}{6}× 30\% =$
$\frac{17}{20}× \frac{2}{3} =$
$125\%× 8 =$
$0.44 + 60\% =$
$\frac{4}{5}× 1.6 =$
$\frac{7}{8}× \frac{4}{25} =$
$40÷ 25\% =$
$8.1÷ 30\% =$
$\frac{4}{75}÷ \frac{3}{5} =$
$65\% + \frac{7}{10} =$
$\frac{4}{3} - 40\% =$
$\frac{7}{16}× \frac{4}{9} =$
$\frac{7}{9}÷ \frac{2}{3} =$
$\frac{9}{14}× \frac{7}{2} =$
$\frac{3}{10}÷ \frac{3}{5} =$
$\frac{3}{14} + \frac{5}{7} =$
$\frac{5}{6}÷ \frac{25}{36} =$
$\frac{14}{15} - \frac{5}{6} =$
$120\%× \frac{10}{27} =$

3
$\frac{5}{8}$
$\frac{1}{4}$
$\frac{17}{30}$
10
1.04
$\frac{32}{25}$
$\frac{7}{50}$
160
27
$\frac{4}{45}$
$\frac{27}{20}$
$\frac{14}{15}$
$\frac{7}{36}$
$\frac{7}{6}$
$\frac{9}{4}$
$\frac{1}{2}$
$\frac{13}{14}$
$\frac{6}{5}$
$\frac{1}{10}$
$\frac{4}{9}$

二、计算下面各题，能用简便算法的就用简便算法。
$35 ÷ \frac{7}{8} - \frac{2}{7} - \frac{5}{7}$
$25\% × \frac{8}{9} ÷ 90\% + \frac{2}{3}$
$(54 + \frac{9}{13}) ÷ 9 + \frac{12}{13}$
$(\frac{4}{27} + \frac{8}{9}) × 3 × 9$
$\frac{7}{2} × 37.5\% - \frac{3}{2} ÷ \frac{8}{3}$
$75\% × 8.8 + 25\% × 8.8$

39
$\frac{74}{81}$
7
28
$\frac{3}{4}$
8.8