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$\frac{1}{4}÷2=
$\frac{1}{5}÷3=
$\frac{2}{3}÷4=
$\frac{4}{5}÷2=
$\frac{3}{4}÷2=
$\frac{5}{7}÷5=
$\frac{9}{10}÷3=
$\frac{4}{5}÷4=
$\frac{8}{9}÷2=
$\frac{7}{12}÷14=
$\frac{5}{9}÷15=
$\frac{3}{10}÷6=
$\frac{1}{8}$
$ $\frac{7}{8}÷7=$\frac{1}{8}$
$$\frac{1}{5}÷3=
$\frac{1}{15}$
$ $\frac{3}{8}÷6=$\frac{1}{16}$
$$\frac{2}{3}÷4=
$\frac{1}{6}$
$ $\frac{3}{5}÷2=$\frac{3}{10}$
$$\frac{4}{5}÷2=
$\frac{2}{5}$
$ $\frac{6}{7}÷6=$\frac{1}{7}$
$$\frac{3}{4}÷2=
$\frac{3}{8}$
$ $\frac{5}{12}÷4=$\frac{5}{48}$
$$\frac{5}{7}÷5=
$\frac{1}{7}$
$ $\frac{1}{4}÷5=$\frac{1}{20}$
$$\frac{9}{10}÷3=
$\frac{3}{10}$
$ $\frac{8}{9}÷3=$\frac{8}{27}$
$$\frac{4}{5}÷4=
$\frac{1}{5}$
$ $\frac{2}{3}÷6=$\frac{1}{9}$
$$\frac{8}{9}÷2=
$\frac{4}{9}$
$ $\frac{10}{13}÷5=$\frac{2}{13}$
$$\frac{7}{12}÷14=
$\frac{1}{24}$
$ $\frac{3}{10}÷9=$\frac{1}{30}$
$$\frac{5}{9}÷15=
$\frac{1}{27}$
$ $\frac{2}{5}÷2=$\frac{1}{5}$
$$\frac{3}{10}÷6=
$\frac{1}{20}$
$ $\frac{1}{12}÷3=$\frac{1}{36}$
$
答案：
解析：这些题目都是分数除法的口算题。分数除法的计算法则是将除法转换为乘法，即“除以一个数等于乘以这个数的倒数”。
答案：
$\frac{1}{4} ÷ 2 = \frac{1}{4} × \frac{1}{2} = \frac{1}{8}$
$\frac{7}{8} ÷ 7 = \frac{7}{8} × \frac{1}{7} = \frac{1}{8}$
$\frac{1}{5} ÷ 3 = \frac{1}{5} × \frac{1}{3} = \frac{1}{15}$
$\frac{3}{8} ÷ 6 = \frac{3}{8} × \frac{1}{6} = \frac{1}{16}$
$\frac{2}{3} ÷ 4 = \frac{2}{3} × \frac{1}{4} = \frac{1}{6}$
$\frac{3}{5} ÷ 2 = \frac{3}{5} × \frac{1}{2} = \frac{3}{10}$
$\frac{4}{5} ÷ 2 = \frac{4}{5} × \frac{1}{2} = \frac{2}{5}$
$\frac{6}{7} ÷ 6 = \frac{6}{7} × \frac{1}{6} = \frac{1}{7}$
$\frac{3}{4} ÷ 2 = \frac{3}{4} × \frac{1}{2} = \frac{3}{8}$
$\frac{5}{12} ÷ 4 = \frac{5}{12} × \frac{1}{4} = \frac{5}{48}$
$\frac{5}{7} ÷ 5 = \frac{5}{7} × \frac{1}{5} = \frac{1}{7}$
$\frac{1}{4} ÷ 5 = \frac{1}{4} × \frac{1}{5} = \frac{1}{20}$
$\frac{9}{10} ÷ 3 = \frac{9}{10} × \frac{1}{3} = \frac{3}{10}$
$\frac{8}{9} ÷ 3 = \frac{8}{9} × \frac{1}{3} = \frac{8}{27}$
$\frac{4}{5} ÷ 4 = \frac{4}{5} × \frac{1}{4} = \frac{1}{5}$
$\frac{2}{3} ÷ 6 = \frac{2}{3} × \frac{1}{6} = \frac{1}{9}$
$\frac{8}{9} ÷ 2 = \frac{8}{9} × \frac{1}{2} = \frac{4}{9}$
$\frac{10}{13} ÷ 5 = \frac{10}{13} × \frac{1}{5} = \frac{2}{13}$
$\frac{7}{12} ÷ 14 = \frac{7}{12} × \frac{1}{14} = \frac{1}{24}$
$\frac{3}{10} ÷ 9 = \frac{3}{10} × \frac{1}{9} = \frac{1}{30}$
$\frac{5}{9} ÷ 15 = \frac{5}{9} × \frac{1}{15} = \frac{1}{27}$
$\frac{2}{5} ÷ 2 = \frac{2}{5} × \frac{1}{2} = \frac{1}{5}$
$\frac{3}{10} ÷ 6 = \frac{3}{10} × \frac{1}{6} = \frac{1}{20}$
$\frac{1}{12} ÷ 3 = \frac{1}{12} × \frac{1}{3} = \frac{1}{36}$
答案：
$\frac{1}{4} ÷ 2 = \frac{1}{4} × \frac{1}{2} = \frac{1}{8}$
$\frac{7}{8} ÷ 7 = \frac{7}{8} × \frac{1}{7} = \frac{1}{8}$
$\frac{1}{5} ÷ 3 = \frac{1}{5} × \frac{1}{3} = \frac{1}{15}$
$\frac{3}{8} ÷ 6 = \frac{3}{8} × \frac{1}{6} = \frac{1}{16}$
$\frac{2}{3} ÷ 4 = \frac{2}{3} × \frac{1}{4} = \frac{1}{6}$
$\frac{3}{5} ÷ 2 = \frac{3}{5} × \frac{1}{2} = \frac{3}{10}$
$\frac{4}{5} ÷ 2 = \frac{4}{5} × \frac{1}{2} = \frac{2}{5}$
$\frac{6}{7} ÷ 6 = \frac{6}{7} × \frac{1}{6} = \frac{1}{7}$
$\frac{3}{4} ÷ 2 = \frac{3}{4} × \frac{1}{2} = \frac{3}{8}$
$\frac{5}{12} ÷ 4 = \frac{5}{12} × \frac{1}{4} = \frac{5}{48}$
$\frac{5}{7} ÷ 5 = \frac{5}{7} × \frac{1}{5} = \frac{1}{7}$
$\frac{1}{4} ÷ 5 = \frac{1}{4} × \frac{1}{5} = \frac{1}{20}$
$\frac{9}{10} ÷ 3 = \frac{9}{10} × \frac{1}{3} = \frac{3}{10}$
$\frac{8}{9} ÷ 3 = \frac{8}{9} × \frac{1}{3} = \frac{8}{27}$
$\frac{4}{5} ÷ 4 = \frac{4}{5} × \frac{1}{4} = \frac{1}{5}$
$\frac{2}{3} ÷ 6 = \frac{2}{3} × \frac{1}{6} = \frac{1}{9}$
$\frac{8}{9} ÷ 2 = \frac{8}{9} × \frac{1}{2} = \frac{4}{9}$
$\frac{10}{13} ÷ 5 = \frac{10}{13} × \frac{1}{5} = \frac{2}{13}$
$\frac{7}{12} ÷ 14 = \frac{7}{12} × \frac{1}{14} = \frac{1}{24}$
$\frac{3}{10} ÷ 9 = \frac{3}{10} × \frac{1}{9} = \frac{1}{30}$
$\frac{5}{9} ÷ 15 = \frac{5}{9} × \frac{1}{15} = \frac{1}{27}$
$\frac{2}{5} ÷ 2 = \frac{2}{5} × \frac{1}{2} = \frac{1}{5}$
$\frac{3}{10} ÷ 6 = \frac{3}{10} × \frac{1}{6} = \frac{1}{20}$
$\frac{1}{12} ÷ 3 = \frac{1}{12} × \frac{1}{3} = \frac{1}{36}$
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