共50条信息
计算:\(\sqrt[{3}]{{27}}-|-{2}|=\)________.
计算:\(\sqrt[3]{8}+{{(\sqrt{2}-1)}^{0}}=\)________.
计算:\(|\sqrt{3}-1|+(2018-π)^{0}-(\dfrac{1}{4})^{-1}-3\tan 30^{\circ}+\sqrt[3]{8}\).
计算:\({{(-2)}^{0}}-\sqrt[3]{8}=\)_________.
\((1)\)计算\((-3)\)\({\,\!}^{2}\)\(-\)\(\sqrt[3]{27}\)\(+(-4)\)\({\,\!}^{0}\)\(-\)\({{(\dfrac{1}{2})}^{-2}}\);
\((2)\)先化简,再求值:\(2b^{2}+(a+b)(a-b)-(a-b)^{2}\),其中\(a=-5\),\(b=\dfrac{5}{2}\).
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