物理实验中每一个物理量都具有真值。但在测量和计算过程中,得到的只能是一个近似值。为了使实验结果尽可能地接近真值,在分析误差产生原因和处理方法的基础上,本文分析有效数字的运算法则及实验数据的处理方法。 Each physical quantity in a physics experiment has a true value. However, during the measurement and calculation, only an approximation can be obtained. In order to make the experimental results as close to the true value as possible, on the basis of analyzing the causes and processing methods of the errors, this paper analyzes the algorithms of effective numbers and the processing methods of experimental data.