第70页

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