题目内容
计算:
原式,··································· (4分)
,··························································· (6分)
,
. (8分)
,··························································· (6分)
,
. (8分)
试题分析:对于一般的有理数混合运算来讲,其运算顺序是先乘方,再乘除,最后算加减,如果遇括号要先算括号里面的.在此基础上,有时也应该根据具体问题的特点,灵活应变,注意方法.
点评:注意任何数与0相乘还是0.
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