物理来自于生活,更能很好指导我们的实践,服务于人类。在许多涉及的计算问题中,对于结果的取值,也常常根据实际情况,有不同的要求。我将物理取值大致概括为四类:四舍五入;只舍不入;只入不舍;入且取偶。我们交流讨论如下:一、四舍五入 Physics comes from life and can better guide our practice and serve mankind. In many calculation problems involved, the values ​​of the results often have different requirements depending on the actual situation. I generalize the physical values ​​into four categories: rounded; rounded; only displeased; We exchange and discuss as follows: First, round down