电子课本网 › 第33页

第33页

信息发布者：

177

0.91

$\frac {36}{25}$

$\frac {13}{15}$

=(64+4.36)×0.25

=68.36×0.25

=17.09

$=\frac {2}{5}÷[\frac {11}{20}×\frac {1}{6}]$

$=\frac {2}{5}÷\frac {11}{120}$

$=\frac {48}{11}$

$ =15×\frac {1}{5}×14+\frac {1}{7}×14×15$

$=3×14+2×15$

$=42+30$

$=72$

$\begin {aligned}解： 0.7x&=3.5×1.5\\0.7x&=5.25\\x &=7.5\end {aligned}$

$\begin {aligned}解： \frac {1}{5}x&=\frac {2}{3}×\frac {3}{4}\\\frac {1}{5}x&=\frac {1}{2}\\x &=\frac {5}{2}\end {aligned}$

$\begin {aligned}解： 10x+10&=5×7\\10x+10&=35\\10x&=25\\x &=2.5\end {aligned}$