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第59頁(yè)

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$\frac{2}{5}$
$1\frac{2}{5}$
$\frac{1}{3}$
$11\frac{2}{3}$
$\frac{5}{8}$
$\frac{1}{12}$
$\frac{3}{11}$
$\frac{2}{11}$
?$=1 ×\frac {2}{3}$?
?$=\frac {2}{3}$?
?$=\frac {25}{9} \div (\frac {5}{4} ×\frac {4}{5})$?
?$=\frac {25}{9}$?
?$=(\frac {5}{8} ×4) ×(\frac {20}{7} ×\frac {7}{10})$?
?$=\frac {5}{2} ×2$?
?$=5$?
$\begin {aligned}解：x&=8÷\frac {4}{5}\\x &=10\end {aligned}$
$\begin {aligned}解：x&=\frac 56-\frac 14\\x &=\frac {7}{12}\end {aligned}$
$\begin {aligned}解：x&=\frac {4}{15}×\frac {5}{8}\\x &=\frac {1}{6}\end {aligned}$
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