将下列有理数化成最简形式
$(i)$. $\frac{-8}{6}$
$(ii)$. $\frac{25}{45}$
$(iii)$. $\frac{-44}{72}$
$(iv)$. $\frac{-8}{10}$
已知: 有理数 -
$(i)$. $\frac{-8}{6}$
$(ii)$. $\frac{25}{45}$
$(iii)$. $\frac{-44}{72}$
$(iv)$. $\frac{-8}{10}$
要求
我们要将给定的有理数化成最简形式。
解答
$(i)$. $\frac{-8}{6}$
$=\frac{2\times(-4)}{2\times3}$
$=\frac{-4}{3}$
$(ii)$. $\frac{25}{45}$
$=\frac{5\times5}{5\times9}$
$=\frac{5}{9}$
$(iii)$. $\frac{-44}{72}$
$=\frac{4\times(-11)}{4\times18}$
$=\frac{-11}{18}$
$(iv)$. $\frac{-8}{10}$
$=\frac{2\times(-4)}{2\times5}$
$=\frac{-4}{5}$
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