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 45$​
​$ =(\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。
​$15×(1-\frac 35)÷6=1($​千克​$)$​
答:每个瓶子装​$1$​千克油。
​$ \frac {175}{6}$​
​$\frac {11}{4}$​