数学是研究现实世界的空间形式和数量关系的一门学科,因而“数”和“形”是不可分割的统一体。数与形的结合,相互沟通、相互印证不仅是数学研究的重要手段,也是数学解题的常用技巧。“数”可以准确澄清“形”的模糊,“形”能直观启迪“数”的计算。教学中要给学生提供可用数形结合思想来解的问题,启发他 Mathematics is a discipline that studies the relationship between the spatial form and the quantity in the real world. Therefore, “number” and “form” are indivisible unity. Combination of numbers and shapes, mutual communication, mutual proof is not only an important means of mathematical research, but also the common math problem solving skills. “Number ” can accurately clarify “shape ” of the fuzzy “shape ” can intuitively enlighten “number ” calculation. Instruct him to provide students with the problem of solving the problems by using the combination of numbers and ideas in teaching