对于一些需要丰富的空间想象的几何图形的数学习题,利用图形与数量相结合的思想,可以快速的将题目解答出来,因为学生可以根据题目中的表述画出几何图形(三棱锥或者是长方体等),再根据题目中给出的数量关系在图形中准确的标记出来,这样可以清晰明确的找到解题的突破口,提高做题的效率,所以在做几何题目时候应该适当的使用图形与数量相结合的解题思想.一、一元二次方程根的分布问题的应用一元二次方程根的分布是高中数学中重要的内容,这一部分知识在初中数学中虽然有涉及,但是不够系统完整,同时初 For some mathematical problems that require rich geometry of spatial imagination, the idea of ​​combining graphics with quantities can quickly answer the questions because students can draw geometry (triangular pyramid or cuboid, etc.) based on the statements in the title ), And then according to the number given in the title of the relationship between the accurate mark in the graphics, so you can clearly and clearly find a breakthrough in solving problems, improve the efficiency of doing the question, so when doing geometry problems should be appropriate to use graphics and the number of phases Combination of the problem-solving ideas. One, one yuan quadratic equation root distribution problem The distribution of root quadratic equation is an important part of high school mathematics, this part of knowledge in junior high school mathematics although involved, but not systematic enough, at the same time early