新课标指出数学思想方法是学生必须掌握的基础内容.特殊法是初中数学的思想方法之一.它在选择题、填空题方面表现得尤为明显.当题设中的条件是一般情况,但对某些情况并未限制,这时可考虑它的特殊情形,利用其特殊性探求问题答案,可化难为易,化繁为简,收到事半功倍的奇效.兹以中考、竞赛试题为例分类试析如下,以供探究. The new curriculum standard points out that the mathematical thinking method is the basic content that the students must master.The special law is one of the ways of thinking of the junior high school mathematics, which is especially obvious in the multiple choice questions and the blank questions.When the conditions in the essay are general conditions, For some situations is not limited, then consider its special circumstances, the use of its uniqueness to explore the answer to the question, can be difficult for the easy to simplify, receive a multiplier effect with wonder. Try below, for exploration.