第72页

信息发布者:
​$1\frac{1}{4}$​
​$\frac{1}{10}$​
​$\frac{2}{5}$​
​$1\frac{1}{4}$​
​$解:\frac {9}{5}x=\frac {3}{10}$​
          ​$x=\frac {1}{6}$​
​$解:\frac {2}{9}x=\frac {5}{6}$​
          ​$x=\frac {15}{4}$​
​$解:\frac {5}{4}x=\frac {11}{6}$​
          ​$x=\frac {22}{15}$​
​$=\frac {3}{7}×\frac {4}{5}+\frac {4}{7}×\frac {5}{4}$​
​$=(\frac {3}{7}+\frac {4}{7})×\frac {4}{5}$​
​$=1×\frac {4}{5}$​
​$=\frac {4}{5}$​

​$=1-\frac {2}{3}÷\frac {2}{3}$​
​$=1-1$​
​$=0$​

​$=\frac {3}{5}÷\frac {3}{2}×\frac {12}{7}$​
​$=\frac {2}{5}×\frac {12}{7}$​
​$=\frac {24}{35}$​

$​6×\frac{2}{5}÷\frac{3}{10}=8(千米)$
$答:平均每小时跑8千米。$
​$15×\frac {3}{5}÷6=1.5(千克)$​
​$答:每个瓶子装1.5千克油。$​

​$\frac {175}{6}$​
​$\frac {11}{4}$​