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第67页

信息发布者：

$1\frac{5}{12}$

$\frac{3}{11}$

0.36

$\frac{4}{5}$

$\frac{1}{6}$

$\frac{2}{3}$

0.3

$\frac{1}{2}$

$=\frac {3}{8}+\frac {5}{6}$

$=\frac {29}{24}$

$=(\frac {4}{7}+\frac {3}{7})+(\frac {3}{11}-\frac {3}{11})$

$=1+0$

$=1$

$=2-(1-\frac {1}{32})$

$=2- \frac {31}{32}$

$=1 \frac {1}{32}$

$=(\frac {8}{7}+\frac {4}{7})-(\frac {2}{5}+\frac {3}{5})$

$=\frac {12}{7}-1$

$=\frac {5}{7}$

$=\frac {4}{5}-\frac {1}{5}$

$=\frac {3}{5}$

$=\frac {2}{7}+[\frac {4}{5}-\frac {1}{2}]$

$=\frac {2}{7}+\frac {3}{10}$

$=\frac {41}{70}$

$\begin{aligned}解：4.2+5x&=8.2\\5x&=4\\x&=0.8\end{aligned}$

$\begin{aligned}解：0.5x&=\frac {3}{2}+\frac {1}{2}\\0.5x&=2\\x&=4\end{aligned}$

$\begin{aligned}解：0.4x&=10\\x&=25\end{aligned}$

$\begin{aligned}解：x-1&=\frac {5}{9}\\x&=\frac {14}{9}\end{aligned}$