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第78頁

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B
B
B
B
$1\frac{1}{2}$
8
$\frac{3}{7}$
0
$1\frac{1}{4}$
$\frac{1}{5}$
$\frac{2}{3}$
$3\frac{1}{3}$
?$=\frac {3}{8} ×\frac {3}{2}$?
?$=\frac {9}{16}$?
?$=(6-\frac {28}{5}) ×\frac {2}{5}$?
?$=\frac {2}{5 } ×\frac {2}{5}$?
?$=\frac {4}{25}$?
?$=\frac {1}{7} ×(\frac {6}{13}+\frac {8}{13})$?
?$=\frac {1}{7} ×\frac {14}{13}$?
?$=\frac {2}{13}$?
?$=(\frac {3}{4}-\frac {3}{4}) ×8$?
?$=0 ×8$?
?$=0$?
?$=\frac {7}{16} ×45-\frac {7}{16} ×45$?
?$=(\frac {7}{16}-\frac {7}{16}) ×45$?
?$=0$?
?$=\frac {3}{5} \div (\frac {1}{12} ×\frac {5}{6})$?
?$=\frac {3}{5} ×\frac {72}{5}$?
?$=\frac {216}{25}$?
$\begin {aligned}解：\frac {7}{5}x&=21\\x &=15\end {aligned}$
$\begin {aligned}解：\frac {5}{7}x&=\frac {1}{14}\\x &=\frac {1}{10}\end {aligned}$
$\begin {aligned}解：\frac {7}{12}x&=84\\x &=144\end {aligned}$
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