电子课本网 第57页

第57页

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8
$\frac{1}{7}$
$1\frac{1}{5}$
$\frac{3}{8}$
1000
$1\frac{2}{5}$
$1\frac{1}{2}$
$2\frac{1}{2}$
$=\frac {9}{26}×\frac {7}{3}×\frac {3}{14}$
$=\frac {9}{52}$
$=\frac {15}{16}×\frac {6}{5}×\frac {8}{9}$
$=1$
$=\frac {35}{12}×\frac {3}{7}$
$=\frac {5}{4}$
$=\frac {1}{15}×15$
$=1$
80
15
50
24
4
3
$\frac {5}{7}$
$\frac {3}{4}$
$\frac {1}{2}$
$\frac {8}{9}$
$\frac {9}{8}$
=
3
340
12