数学教学的重要任务之一是训练学生思维,故有“数学是思维的体操”之说。在实际教学中,学生反映出来的思维能力方面的问题和缺陷是很多的,譬如:有些学生能记住教材却不会运用;有些学生只能用一种方法思考问题,碰壁之后也不会寻找其他方法;又有些学生习惯于用老方法解题,而不愿意接受新的方法;也有一些学生专门喜欢用刚学过的定 One of the important tasks of mathematics teaching is to train students’ thinking. Therefore, “Mathematics is the gymnastics of thinking”. In actual teaching, students have many problems and defects in thinking ability reflected, for example, some students can not remember teaching materials and some students can only use one method to think about the problem and they will not look after them Other methods; some students are accustomed to using the old method to solve problems, but do not want to accept the new method; there are some students who like to use just decided