计算：(1)(-0.02)times (-20)times (-5)times 4.5；(2)(-6.5)times (-2)div (-dfrac(1)(3))div (-5)；(3)6+(-dfrac(1)(5))-2-(-1.5)；

计算：(1)$(-0.02)\times (-20)\times (-5)\times 4.5$；(2)$(-6.5)\times (-2)\div \left(-\dfrac{1}{3}\right)\div (-5)$；(3)$6+\left(-\dfrac{1}{5}\right)-2-(-1.5)$；

参考答案与解析：

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