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信息发布者：
$\frac{3}{10}$
$\frac{3}{5}$
10
12
2
0
$2\frac{1}{3}$
$\frac{1}{6}$
$=\frac {5}{12}+\frac {6}{12}$
$=\frac {11}{12}$
$=\frac {2}{5}÷\frac {2}{5}÷\frac {3}{4}$
$=1÷\frac {3}{4}$
$=\frac {4}{3}$

$=\frac {2}{5}×\frac {1}{12}$
$=\frac {1}{30}$
$=\frac {1}{2}+(\frac {4}{7}+\frac {3}{7})$
$=\frac {1}{2}+1$
$=\frac {3}{2}$

$=\frac {13}{10}×\frac {1}{7}+\frac {13}{10}×\frac {6}{7}$
$=\frac {13}{10}×(\frac {1}{7}+\frac {6}{7})$
$=\frac {13}{10}×1$
$=\frac {13}{10}$

$=36×\frac {1}{4}+36×\frac {2}{3}$
$=9+24$
$=33$

$1+3+4=8$
$256×(\frac {4}{8}-\frac {1}{8})=96(本)$
$答：下层比上层多放96本图书。$

$45×\frac {4}{5}÷3=12(千克)$
$答：每个油箱装12千克。$
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