简化以下算式:$-\frac{2}{3}+(\frac{2}{3}+\frac{4}{5})$
已知
给定的表达式为 $-\frac{2}{3}+(\frac{2}{3}+\frac{4}{5})$.
要求
我们需要简化给定的表达式。
解答
$-\frac{2}{3}+(\frac{2}{3}+\frac{4}{5})$
加法满足结合律。加法的结合律指出
$(a+b)+c = a+(b+c)$
因此,
$-\frac{2}{3}+(\frac{2}{3}+\frac{4}{5})=(-\frac{2}{3}+\frac{2}{3})+\frac{4}{5}$
$ = 0+\frac{4}{5}$
$= \frac{4}{5}$.
因此,$-\frac{2}{3}+(\frac{2}{3}+\frac{4}{5})$ 的值为 $\frac{4}{5}$。
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