在一定范围内,数与形可以相互转换,教师需要搭建桥梁,构建数与形关系,把图形性质转化为数量关系,或者把数量关系转化为图形性质,从而让问题更趋简单,让抽象变得具体。本文着重从数量关系与图形性质之间的关系出发,具体谈谈运用技巧,从而真正让解题由复杂变为简单。 Within a certain range, numbers and shapes can be transformed into one another. Teachers need to build a bridge, build the relationship between number and form, transform the nature of the figure into the quantitative relation, or turn the quantitative relation into the graphical property, so as to make the problem simpler and more abstract To be specific. This article focuses on the relationship between quantitative and graphical nature of the starting point, the specific talk about the use of skills, so that truly solve the problem from complex to simple.