简化以下算式 $ \frac{1}{5}+\left(\frac{2}{5}+\frac{3}{5}\right) $
已知:$ \frac{1}{5}+\left(\frac{2}{5}+\frac{3}{5}\right) $
要求:解此表达式
解答
$ \frac{1}{5}+\left(\frac{2}{5}+\frac{3}{5}\right) $
= $\frac{1}{5} + \frac{2+3}{5}$
= $\frac{1}{5} + \frac{5}{5}$
= $(\frac{1 + 5}{5})$
= $\frac{6}{5}$ 答案
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