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第107頁

信息發(fā)布者：

$\frac {5}{9}$

1

0

5

1

5

0.2

115

23

20

$3：2=1.5$

$6：5=1.2$

$5：12=\frac {5}{12}$

$=4×9$

$=36$

$=\frac {2}{5}$

$=\frac {15}{16}×\frac {4}{5}$

$=\frac {3}{4}$

$=\frac {2}{5}×15$

$=6$

?$ =\frac {5}{12}×\frac {3}{2}×\frac {6}{5}$?

?$ =\frac {3}{4}$?

?$ =\frac {6}{7}×\frac {8}{3}×\frac {14}{15}$?

?$ =\frac {32}{15}$?

?$ =\frac {7}{13}×\frac {1}{8}+\frac {1}{8}×\frac {1}{13}$?

?$ =\frac {1}{8}×(\frac {7}{13}+\frac {1}{13})$?

?$ =\frac {1}{8}×\frac {8}{13}$?

?$ =\frac {1}{13}$?

$=(\frac {5}{9}+\frac {4}{9})+(\frac {3}{11}+\frac {8}{11})$

$=1+1$

$=2$

$=\frac {7}{16}×45-\frac {7}{16}×45$

$=0$

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