代数恒等变形是数学解题的基石 ,变形能力的强弱直接制约着解题能力的高低 .变形实质上是为了达到某种目的而采用的“手段” ,是化归、转化和联想的准备阶段 ,它属于技能性的知识 ,需要在实践中反复操练才能把握 ,乃至灵活与综合应用 .学生在平时学习中不善于积累变形经验 ,在 Algebraic equal deformation is the cornerstone of mathematics problem solving. The strength of deformability directly constrains the level of problem solving ability. Deformation is essentially a “method” used to achieve a certain purpose, and is a preparation for transformation, transformation, and association. At the stage, it belongs to the knowledge of skill and it needs to be drilled repeatedly in practice to grasp, even be flexible and comprehensively applied. Students are not good at accumulating deformation experience in peacetime learning.