题目内容
化简:
原式,······················································ (4分)
,··························································· (6分)
. (8分)
,··························································· (6分)
. (8分)
试题分析:运用整式的加减运算顺序计算:先去括号,再合并同类项.注意不要漏乘.
点评:解决此类题目的关键是熟记去括号法则,及熟练运用合并同类项的法则,是各地中考的常考点.
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