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贵刊(初中版)在2012年1月刊发了甘肃陈国玉老师的《不等式基本性质的运用》,在比较大小、实际运用、确定范围三方面,运用不等式的三条基本性质进行求解,求解效果甚好,然而并不易于理解,求解过程不够简炼.同学们细心品读不等式的基本性质,可以发现:不等式基本性质的最大关键为不等号方向改变与否.据此,完全可以将不等式的基本性质,进一步总结为:(1)不等式两边同时乘以0,不等号变成等号;(2)只有不等式两边同时
In January 2012, your journal (Junior High School Edition) published the application of the basic properties of inequality by Gansu Teacher Chen Guoyu in Gansu Province in January 2012. The three basic properties of inequality are compared in terms of size, practical application and scope of determination. Good, but not easy to understand, the process of solving is not simple enough.The students carefully read the basic nature of inequality, you can find: the basic nature of inequality is the biggest key to change the direction of inequalities.Accordingly, the basic properties of inequality, Further summarized as: (1) both sides of the inequality multiplied by 0 at the same time, inequalities become equal signs; (2) only the inequality at the same time on both sides