1. $\frac {4}{9}÷2= ()$,先想$\frac {4}{9}$里面有()个$\frac {1}{9}$,平均分成2份,每份是()个$\frac {1}{9}$,是()。

$\frac{2}{9}$；$4$；$2$；$\frac{2}{9}$

2. 在()里面填上合适的数,在$\bigcirc$里填上“＞”“＜”或
$1÷6= ()$ $5÷30= ()$ $17÷48= ()$
$1×\frac {1}{6}= ()$ $5×\frac {1}{30}= ()$ $17×\frac {1}{48}= ()$
$1÷6\bigcirc 1×\frac {1}{6}$ $5÷30\bigcirc 5×\frac {1}{30}$ $17÷48\bigcirc 17×\frac {1}{48}$
$\frac {5}{6}÷3= \frac {5}{6}×\frac {()}{()}= ()$ $\frac {5}{21}÷7= \frac {5}{21}×\frac {()}{()}= ()$

$1\div6 = (\frac{1}{6})$ $5\div30 = (\frac{1}{6})$ $17\div48 = (\frac{17}{48})$
$1\times\frac{1}{6}= (\frac{1}{6})$ $5\times\frac{1}{30}= (\frac{1}{6})$ $17\times\frac{1}{48}= (\frac{17}{48})$
$1\div6 = 1\times\frac{1}{6}$ $5\div30 = 5\times\frac{1}{30}$ $17\div48 = 17\times\frac{1}{48}$
$\frac{5}{6}\div3=\frac{5}{6}\times\frac{(1)}{(3)} = (\frac{5}{18})$ $\frac{5}{21}\div7=\frac{5}{21}\times\frac{(1)}{(7)} = (\frac{5}{147})$

二、先画一画,涂一涂,再用算式表示结果

$\frac {4}{7}$的一半是多少？
算式：


把$\frac {2}{5}$平均分成4份,每份是多少？
算式：

- $\frac{4}{7}×\frac{1}{2}$
- $\frac{2}{5}×\frac{1}{4}$

三、解方程
$5x= \frac {1}{5}$ $13x= \frac {26}{25}$ $x+7x= \frac {32}{5}$

方程$5x = \frac{1}{5}$的解为$x=\frac{1}{25}$；方程$13x=\frac{26}{25}$的解为$x=\frac{2}{25}$；方程$x + 7x=\frac{32}{5}$的解为$x=\frac{4}{5}$。