1. 直接写出得数。(20☆)
$\frac{7}{12}÷4=$
$\frac{3}{7}÷7=$
$\frac{1}{4}÷3=$
$\frac{5}{8}÷5=$
$\frac{1}{5}÷9=$
$\frac{4}{11}÷8=$
$\frac{6}{11}÷6=$
$\frac{4}{23}÷2=$
$\frac{21}{22}÷14=$
$\frac{5}{18}÷5=$
$\frac{8}{11}÷16=$
$\frac{1}{5}÷20=$
$\frac{9}{10}÷18=$
$\frac{6}{7}÷3=$
$\frac{8}{11}÷4=$
$\frac{33}{35}÷11=$
$\frac{8}{31}÷2=$
$\frac{15}{17}÷15=$
$\frac{21}{23}÷7=$
$\frac{7}{6}÷5=$

1.$\frac{7}{48}$
$\frac{3}{49}$
$\frac{1}{12}$
$\frac{1}{8}$
$\frac{1}{45}$
$\frac{1}{22}$
$\frac{1}{11}$
$\frac{2}{23}$
$\frac{3}{44}$
$\frac{1}{18}$
$\frac{1}{22}$
$\frac{1}{100}$
$\frac{1}{20}$
$\frac{2}{7}$
$\frac{2}{11}$
$\frac{3}{35}$
$\frac{4}{31}$
$\frac{1}{17}$
$\frac{3}{23}$
$\frac{7}{30}$

2. 填一填。(12☆)
$\frac{4}{7}×( )=1$
$\frac{10}{3}×( )=1$
$12×( )=1$
$\frac{1}{30}×( )=1$
$15×( )=1$
$\frac{25}{7}×( )=1$
$36×( )=1$
$\frac{1}{70}×( )=1$
$\frac{7}{9}×( )=1$
$\frac{5}{11}×( )=1$
$5×( )=1$
$\frac{17}{18}×( )=1$

2.$\frac{7}{4}$
$\frac{3}{10}$
$\frac{1}{12}$
$30$
$\frac{1}{15}$
$\frac{7}{25}$
$\frac{1}{36}$
$70$
$\frac{9}{7}$
$\frac{11}{5}$
$\frac{1}{5}$
$\frac{18}{17}$

3. 涂一涂,算一算。(9☆)
(1)$\frac{3}{4}÷3=$
(2)$\frac{2}{5}÷4=$
(3)$\frac{4}{7}÷4=$

3.(1) 涂色参考，结果为$\frac{1}{4}$
(2) 涂色参考，结果为$\frac{1}{10}$
(3) 涂色参考，结果为$\frac{1}{7}$

4. 计算下面各题。(9☆)
$\frac{15}{58}÷3+\frac{15}{58}÷5$
$\frac{3}{4}÷15+\frac{3}{4}÷3$
$\frac{1}{15}+\frac{8}{15}÷3×\frac{9}{8}$

4.$\frac{4}{29}$
$\frac{3}{10}$
$\frac{4}{15}$