有不少数学题,用常规的方法解答会花费较多的时间,并且思考、推理、演算较为费劲.而运用特值法可以避免繁琐的运算,将会事半功倍,见效神速,甚至达到“点石成金”的效果.但学生做题时往往想不到利用特值法,同学讨论或老师评讲时才恍然大悟,普遍感到难以掌握和驾驭.笔者经广泛调研,从2012年高考理科卷中精选10道题为例,对特值法进行分类整理,以便明确特值法的使用对象,希望与大家共享. There are many math problems, using conventional methods will take more time to answer, and thinking, reasoning, calculation is more strenuous. The use of special value method can avoid the cumbersome operation, will be more effective, effective, or even reach the point Shi Cheng Jin ".But when the students do not often think of the use of special value method, students discuss or teacher comment only when suddenly realized, it is generally difficult to grasp and control of the author after extensive research, selected from the college entrance examination science papers in 2012 10 questions, for example, the classification of special value method to clarify the use of special value object, I hope to share with you.