【摘要】  解决问题教学在小学数学中是很重要的内容，而化归思想作为重要的数学思想方法，能够在解决问题教学中把一个较复杂的数学问题转化，归结为一个较为简单的数学问题，有利于培养学生解决问题的意识和能力。在小学数学教学中渗透化归思想需要遵循四个原则：熟悉化原则、简单化原则、直观化原则和“凑”的原则。通过对化归思想在“数与代数”“空间与图形”解决问题教学中的运用进行案例分析及教学反思，了解化归思想的重要性，重视对数学思想的渗透。

【关键词】 化归思想，小学数学，解决问题教学，运用，反思

【abstract】To solve the problem of teaching is a very important content in primary school mathematics, and classified as important mathematics thoughts and methods, can transform a complex mathematical problem in solving problems in teaching, comes down to a simple mathematical problems, to cultivate the students' awareness and ability to solve problems. Permeability reduction thought should follow four principles in math teaching in primary school: familiar with the principle, simple principle, intuitive principle and the "close" principle. Based on the idea of "number and Algebra" in "space and graph" to solve the problem of teaching case analysis and reflection of teaching, to understand the importance of the idea, pay attention to penetration of mathematical thinking.

【keyword】The idea；primary school mathematics teaching,；problem solving；application；review