第62页

信息发布者:
$=\frac {15+12+2}{20}$
= $\frac{29}{20}$
$=\frac {1}{2}-\frac {1}{8}$
= $\frac{3}{8}$
$=\frac {28-20+7}{28}$
= $\frac{15}{28}$
$=1-\frac {13}{24}$
= $\frac{11}{24}$
$=\frac {3}{4}+\frac {1}{24}$
= $\frac{19}{24}$
$=\frac {2}{3}-\frac {2}{9} $
=$\frac{4}{9}$

×
$\frac{1}{2}+\frac{1}{5}+\frac{1}{6}=\frac{15}{30}+\frac{6}{30}+\frac{5}{30}=\frac{13}{15}$
$1-\frac{13}{15}=\frac{2}{15}$
答:这个展台三天一共卖出全部图书的$\frac{13}{15},$还剩$\frac{2}{15}。$
$\frac{1}{6}+\frac{1}{3}+\frac{1}{2}=\frac{1}{6}+\frac{2}{6}+\frac{3}{6}=1$(杯)
答:小明喝的水和果汁一样多。