1.直接写出得数。
$\frac{7}{12} ÷ 7 =$
$\frac{25}{21} ÷ 5 =$
$1.2 ÷ \frac{1}{3} =$
$\frac{4}{15} ÷ 6 =$
$\frac{11}{32} ÷ \frac{11}{16} =$
$\frac{7}{18} ÷ \frac{5}{9} =$
$\frac{5}{6} ÷ \frac{1}{3} =$
$\frac{5}{4} ÷ \frac{1}{4} =$

1.$\frac{1}{12}$ $\frac{5}{21}$ 3.6 $\frac{2}{45}$ $\frac{1}{2}$ $\frac{7}{10}$ $\frac{5}{2}$ 5

2.看图列式计算。
(1)
(2)

(1)$12÷\frac{3}{4}=16(\mathrm{km})$
(2)$20×\frac{4}{5}=16(\mathrm{人})$

3.计算下面各题。
$2 - \frac{3}{8} ÷ \frac{11}{16} - \frac{5}{11}$
$15 ÷ \frac{5}{6} × \frac{3}{7}$
$2.4 ÷ \frac{3}{4} ÷ \frac{4}{5}$
$( \frac{3}{8} - \frac{1}{2} × \frac{1}{3} ) ÷ \frac{1}{24}$

$2-\frac{3}{8}÷\frac{11}{16}-\frac{5}{11}$
$=2-\frac{3}{8}×\frac{16}{11}-\frac{5}{11}$
$=2-\frac{6}{11}-\frac{5}{11}$
$=2-(\frac{6}{11}+\frac{5}{11})$
$=2-1$
$=1$
$15÷\frac{5}{6}×\frac{3}{7}$
$=15×\frac{6}{5}×\frac{3}{7}$
$=\frac{54}{7}$
$2.4÷\frac{3}{4}÷\frac{4}{5}$
$=2.4×\frac{4}{3}×\frac{5}{4}$
$=4$
$(\frac{3}{8}-\frac{1}{2}×\frac{1}{3})÷\frac{1}{24}$
$=(\frac{3}{8}-\frac{1}{6})÷\frac{1}{24}$
$=(\frac{3}{8}-\frac{1}{6})×24$
$=\frac{3}{8}×24-\frac{1}{6}×24$
$=9-4$
$=5$