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第61页

信息发布者：

$\frac{5}{8}$

$\frac{2}{9}$

$\frac{1}{9}$

$1\frac{1}{7}$

$\frac{3}{5}$

$3\frac{1}{4}$

0.7

$2\frac{3}{4}$

$=\frac {3}{4}-\frac {17}{24}$

$=\frac {1}{24}$

$=(\frac {4}{7}-\frac {3}{7})+(\frac {7}{8}+\frac {1}{8})$

$=\frac {1}{7}+1$

$=\frac {8}{7}$

$=\frac {3}{5}+\frac {7}{5}+\frac {7}{6}$

$=2+\frac {7}{6}$

$=\frac {19}{6}$

$=\frac {11}{10}-(\frac {2}{5}+\frac {3}{5})$

$=\frac {11}{10}-1$

$=\frac {1}{10}$

$=3-(\frac {6}{11}+\frac {7}{11}+\frac {9}{11})$

$=3-2$

$=1$

$=1-\frac {1}{16}$

$= \frac {15}{16}$

$\begin{aligned}解：7x&=0.56\\x&=0.08\end{aligned}$

$\begin{aligned}解：5x+1&=65\\5x&=64\\x&=12.8\end{aligned}$

$\begin{aligned}解：3x+8.5&=10\\3x&=1.5\\x&=0.5\end{aligned}$

$\begin{aligned}解：0.4x&=1\\x&=2.5\end{aligned}$