电子课本网 第78页

第78页

信息发布者:
B
B
B
B
​$ \frac {3}{2}$​
8
​$ \frac {3}{7}$​
0
​$ \frac {5}{4}$​
​$ \frac {1}{5}$​
​$ \frac {2}{3}$​
​$ \frac {10}{3}$​
​$=\frac {3}{8} ×\frac {3}{2}$​
​$=\frac {9}{16}$​
​$=(6-\frac {28}{5}) ×\frac {2}{5}$​
​$=\frac {2}{5 } ×\frac {2}{5}$​
​$=\frac {4}{25}$​
​$=\frac {1}{7} ×(\frac {6}{13}+\frac {8}{13})$​
​$=\frac {1}{7} ×\frac {14}{13}$​
​$=\frac {2}{13}$​
​$=(\frac {3}{4}-\frac {3}{4}) ×8$​
​$=0 ×8$​
​$=0$​
​$=\frac {7}{16} ×45-\frac {7}{16} ×45$​
​$=(\frac {7}{16}-\frac {7}{16}) ×45$​
​$=0$​
​$=\frac {3}{5} \div (\frac {1}{12} ×\frac {5}{6})$​
​$=\frac {3}{5} ×\frac {72}{5}$​
​$=\frac {216}{25}$​
解:​$\frac {7}{5}x=21$​
​$x=15$​
解:​$\frac {5}{7}x=\frac {1}{14}$​
​$x=\frac {1}{10}$​
解:​$\frac {7}{12}x=84$​
​$x=144$​