在数学解题中,把题中的关键句或某个条件进行合理的等效转换,即在传授新知中恰当地运用旧知,进行相关知识点的迁移,使复杂的新题变得简单,使抽象的变得具体。这样,不但降低了教学难度,活跃了课堂气氛,而且还开拓了学生的解题思路,培养了学生从不同角度进行审题的习惯,提高学生的解题能力。一、等效转换可以激发学习新知识的兴趣,强化新旧知识的联系例1:捕鱼船五月份捕鱼2400吨,六月份比五月份多捕了 In mathematics problem solving, the key sentence or a certain condition in the question should be converted into a reasonable equivalent, that is, the proper use of old knowledge in the imparting of new knowledge, the relocation of related knowledge points, the simplification of new questions, Abstract becomes concrete. In this way, not only reduces the difficulty of teaching, active classroom atmosphere, but also open up the students ’problem-solving ideas, training students from different angles, the practice of exam questions, improve students’ problem-solving skills. First, the equivalent conversion can stimulate interest in learning new knowledge and strengthen the relationship between old and new knowledge Example 1: Fishing vessels in May fishing 2,400 tons, caught more in June than in May