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電子課本網 › 第33頁

第33頁

信息發(fā)布者：
A
B
A
6.18
8
12
9
?$\frac {11}{12}$?
?$\frac {36}{25}$?
?$\frac {5}{6}$?
?$\frac {9}{16}$?
?$=\frac {1}{4}×(3.64+4.36)$?
?$=\frac {1}{4}×8$?
?$=2$?
?$=\frac {2}{5}÷(\frac {1}{2}+\frac {3}{10})$?
?$=\frac {2}{5}÷\frac {4}{5}$?
?$=\frac {1}{2}$?
=6+10
=16
$\begin{aligned}解：\frac {1}{5}x&=\frac {2}{3}×\frac {3}{4}\\\frac {1}{5}x&=\frac {1}{2}\\x&=\frac {5}{2}\end{aligned}$
$\begin{aligned}解：\frac {2}{3}x&=5×\frac {4}{5}\\\frac {2}{3}x&=4\\x&=6\end{aligned}$
$\begin{aligned}解：\frac {3}{5}x&=42×\frac {5}{7}\\\frac {3}{5}x&=30\\x&=50\end{aligned}$
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