如果我们需要将$\frac{4}{2}, \frac{9}{5}, \frac{6}{7}$和$\frac{1}{8}$化为同分母分数并按升序排列,应该如何操作?
解答: 为了将分数转换为同分母分数,首先我们需要找到分母的最小公倍数 (LCM)。然后,我们需要将它们转换为同分母分数。
同分母分数具有相同的分母。
因此,我们取 2、5、7、8 的最小公倍数,即 280。
我们需要乘以和除以分数,使分母变为 280。
将 280 除以 2、5、7、8 并记下商。将每个分数的分子和分母都乘以相应的商。
$\frac{4}{2} = \frac{4}{2}\times\frac{140}{140} = \frac{560}{280}$
$\frac{9}{5} = \frac{9}{5}\times\frac{56}{56} = \frac{504}{280}$
$\frac{6}{7} = \frac{6}{7}\times\frac{40}{40} = \frac{240}{280}$
$\frac{1}{8} = \frac{1}{8}\times\frac{35}{35} = \frac{35}{280}$
现在,它们是同分母分数,通过比较分子,我们可以发现 35 < 240 < 504 < 560
所以 $\frac{1}{8} < \frac{6}{7} < \frac{9}{5} < \frac{4}{2}$
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