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第4页

信息发布者：

0.008

$\frac{1}{36}$

$\frac{10}{7}$

$\frac{1}{9}$

解：$\frac {1}{4}x=1-\frac {5}{6}$

$\frac {1}{4}x=\frac {1}{6}$

$x=\frac {1}{6}×4$

$x=\frac {2}{3}$

解：$\frac {4}{7}x=\frac {3}{5}×\frac {4}{5}$

$\frac {4}{7}x=\frac {12}{25}$

$x=\frac {12}{25}÷\frac {4}{7}$

$x=\frac {21}{25}$

$\begin{aligned}解：0.75x - 0.4x&=28\\0.35x&=28\\x&=80\end{aligned}$

=(7.5+2.5)-(1.27+3.73)

=10-5

 =4×25×0.27

 =100×0.27

=27

=$\frac{5}{3}-\frac{5}{9}-\frac{4}{9}$

=$\frac{5}{3}-(\frac{5}{9}+\frac{4}{9})$

=$\frac{5}{3}-1$

=$\frac{2}{3}$

=$\frac{5}{8}×\frac{4}{13}+\frac{9}{13}×\frac{5}{8}$

=$\frac{5}{8}×(\frac{4}{13}+\frac{9}{13})$

=$\frac{5}{8}×1$

=0.625

$4:1$