共50条信息
计算
\((1)\dfrac{1}{2}+(-\dfrac{2}{3})-(-\dfrac{4}{5})+(-\dfrac{1}{2})\) \(;\)
\((2)(-7)\times (-\dfrac{4}{3})\times \dfrac{5}{14};\)
\((3)(0.25-\dfrac{2}{3})\times (-36)\) \(;\)
\((4)\left[ {{(-3)}^{2}}-{{(-5)}^{2}} \right]\div (-2)\).
计算:\(-{{1}^{4}}-\dfrac{1}{6}\times [2-{{(-3)}^{2}}].\)
进入组卷