在GB1467冶金产品化学分析方法标准的总则及一般规定中指出:用冶金产品化学分析方法标准所测量和度量到的数据,要根据分析工作中所用仪器、容量等精度情况,以有效数字表示,如以0.5000克,10.000毫升表示重量和体积等。做加减法运算时,有效数字的保留以小数点后位数最少的数为准,先弃去过多的位数再计算。做乘除法运算时,有效数字保留以有效数字位数最少的数为准,先弃去过多的位数再计算。所得分析结果应 GB1467 metallurgical products in the chemical analysis of the standard methods and general provisions of the general rules: the standard method of chemical analysis of metallurgical products measured and measured by the data used in the analysis of instruments, capacity and other precision, expressed in valid figures, such as With 0.5000 grams, 10.000 ml said weight and volume. To do addition and subtraction operations, the effective number of reservations to the number of digits after the decimal point whichever is the quasi, first abandoned to the excessive number of bits and then calculated. Do multiplication and division, the effective number of reservations to the effective number of digits as the number of whichever is the first to abandon the excessive number of bits and then calculate. The results of the analysis should be