共50条信息
计算:\(-18\times \left( \dfrac{1}{2}-\dfrac{5}{6}+\dfrac{2}{3} \right)\).
计算:\(16\div \left( -\dfrac{1}{2} \right)\times \left( -\dfrac{3}{8} \right)-\left( +4 \right)\).
计算:\(-\dfrac{3}{4}\times \left[ -{{3}^{2}}\times {{\left( -\dfrac{2}{3} \right)}^{3}}-2 \right]\).
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