一、口算。
$6÷\frac {5}{12}=$
$\frac {5}{48}÷\frac {1}{4}=$
$\frac {3}{4}÷\frac {9}{8}=$
$\frac {1}{2}÷\frac {2}{3}=$
$\frac {5}{9}÷\frac {5}{6}=$
$15÷\frac {5}{7}=$
$\frac {4}{9}÷\frac {4}{5}=$
$\frac {5}{8}÷2=$
$\frac {7}{12}÷14=$
$\frac {8}{15}÷\frac {2}{3}=$
$\frac {14}{15}÷\frac {2}{5}=$
$\frac {4}{5}÷\frac {6}{65}=$
$\frac {5}{12}÷4=$
$\frac {9}{25}÷\frac {3}{10}=$
$\frac {2}{15}÷\frac {6}{5}=$
$10÷\frac {1}{15}=$
$\frac {5}{8}÷\frac {3}{10}=$
$\frac {5}{8}÷\frac {5}{2}=$
$\frac {2}{5}÷\frac {3}{4}=$
$\frac {1}{5}÷\frac {3}{4}=$
$\frac {3}{10}÷\frac {9}{50}=$

一、$\frac {72}{5}$ $\frac {5}{12}$ $\frac {2}{3}$
$\frac {3}{4}$ $\frac {2}{3}$ 21
$\frac {5}{9}$ $\frac {5}{16}$ $\frac {1}{24}$
$\frac {4}{5}$ $\frac {7}{3}$ $\frac {26}{3}$
$\frac {5}{48}$ $\frac {6}{5}$ $\frac {1}{9}$
150 $\frac {25}{12}$ $\frac {1}{4}$
$\frac {8}{15}$ $\frac {4}{15}$ $\frac {5}{3}$

二、解方程。
$3x= \frac {3}{8}$
$\frac {2}{5}x= 10$
$\frac {2}{3}x= 25$
$\frac {4}{5}x= \frac {4}{5}$
$\frac {3}{8}x= \frac {9}{32}$
$\frac {2}{13}x= \frac {4}{9}$

二、$x=\frac {1}{8}$
$x=25$
$x=\frac {75}{2}$
$x=1$
$x=\frac {3}{4}$
$x=\frac {26}{9}$