物理知识的形成来源于大自然和生活实践 ,同时又运用于自然 ,服务于社会的生活、生产、科研实践并解决一些实际问题 .当我们依据物理知识、利用数学工具求解出相关物理问题的数值后 ,对计算结果的处理是解题过程中的重要步骤之一 .若结果的数值不是整数 ,我们常用四舍五入的原 The formation of physical knowledge comes from nature and life practices. At the same time, it is applied to nature, serves the society’s life, production, scientific research practice and solves some practical problems. When we use mathematical tools to solve the numerical problems related to physical problems based on physical knowledge. After that, the processing of the calculation results is one of the important steps in the problem solving process. If the value of the result is not an integer, we often round the original