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本文结合2014年中考题,归类解析不等式(组)问题的解题方法.一、利用不等式的性质解简单的不等式(组)例1(广东)若x>y,则下列式子中错误的是()(A)x-3>y-3(B)x3>y3(C)x+3>y+3(D)-3x>-3y解析根据不等式的性质1知,A、C正确;根据不等式的性质2知,B正确,D错误.答案选D.点评本题只需根据不等式的基本性质,进行选择判断即可.
In this paper, the problem-solving method for solving inequality (group) problems is classified according to the 2014 middle school entrance examination questions. First, using the properties of inequalities to solve simple inequalities (group) Example 1 (Guangdong) If x> y, then the following error (A) x-3> y-3 (B) x3> y3 (C) x +3> y +3 (D) -3x> -3y According to the nature of the inequality 1, A and C are correct; According to the nature of the inequality 2 know, B is correct, D wrong answer selected D. Comments on this issue just based on the basic nature of inequality, you can choose to judge.