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第70页

信息发布者：

$\frac{3}{8}$、$\frac{3}{7}$、$\frac{6}{11}$、$\frac{3}{4}$、$\frac{5}{9}$

$\frac{1}{6}$、$\frac{1}{5}$、$\frac{4}{13}$

 $2\frac{1}{8}；$$1\frac{4}{5}；$4；$5\frac{7}{9}；$$4\frac{7}{20}$

0.375

0.71

0.8

1.17

$\frac{5}{8}$

$\frac{3}{2}$

$\frac{7}{20}$

$5\frac {6}{25}$

$\frac{2}{3}$

$\frac{4}{5}$

$\frac{1}{3}$

$\frac{3}{4}$

$ \frac {2}{3}=\frac {10}{15}，$$\frac {3}{5}=\frac {9}{15}，$$\frac {2}{3}＞\frac {3}{5}；$

$\frac {7}{12}=\frac {21}{36}，$$\frac {5}{9}=\frac {20}{36}，$$\frac {7}{12}＞\frac {5}{9}；$

$\frac {7}{18}=\frac {14}{36}，$$\frac {5}{12}=\frac {15}{36}，$$\frac {7}{18}＜\frac {5}{12}$

$\frac {2}{5}$＜$\frac {5}{8}$＜$\frac {3}{4}$

$\frac {3}{4}$＜$\frac {4}{5}$＜$\frac {6}{7}$