第26页

信息发布者:
​$=\frac {5}{4}×\frac {9}{5}×\frac {5}{4} $​
​$=\frac {45}{16}$​
​$=\frac {4}{9}×\frac {15}{16}×\frac {6}{5}$​
​$= \frac {1}{2}$​
​$=\frac {1}{8}×\frac {7}{11}+\frac {9}{11}×\frac {1}{8}$​
​$=\frac {1}{8}×(\frac {9}{11}+\frac {7}{11})$​
​$=\frac {1}{8}×\frac {16}{11}$​
​$= \frac {2}{11}$​
​$=\frac {1}{7}×\frac {1}{7}+7×7$​
​$= 49\frac {1}{49}$​
​$=\frac {2}{3}×24+\frac {1}{6}×24-\frac {3}{4}×24$​
​$=16+4-18$​
​$= 2$​
​$=\frac {8}{9}×(\frac {3}{4}÷\frac {8}{15})$​
​$=\frac {8}{9}×(\frac {3}{4}×\frac {15}{8})$​
​$= \frac {5}{4}$​
解:$350 + 30\%x = x,$
解得$x = 500$
解: $x + 20\%x = 36,$
解得$x = 30$