第113页

信息发布者:
$\frac{1}{2}$
$\frac{1}{14}$
$\frac{1}{2}$
$\frac{1}{2}$
$\frac{5}{6}$
$\frac{1}{8}$
$\frac{4}{7}$
$7\frac{1}{2}$
$=\frac {18-5+15}{30}$
$= \frac {14}{15} $
$=\frac {4}{9}+\frac {5}{9}+\frac {5}{7}$
$= \frac {12}{7} $
= 21
$= \frac {1}{18} $
$=\frac {4}{5}-\frac {1}{5}$
$= \frac {3}{5} $
$=1-\frac {1}{2}+\frac {1}{2}-\frac {1}{4}+\frac {1}{4}-\frac {1}{8}+\frac {1}{8}-\frac {1}{16}$
$= \frac {15}{16} $
$解:x=\frac {5}{6}-\frac {4}{9}$
$x= \frac {7}{18} $
解:5.5x=11
x= 2
解:4x=20
x= 5
解:0.95x=5.7
x= 6