1.3.4 Significant figures and measurement results
The number of significant digits of a measured or calculated value should be recorded based on the absolute error(usually take one significant digit).The order of magnitude of the last digit of the result should be consistent with that of the error.For example,the average of multiple measurements of a length comes at 68.583 cm,and the calculation reveals that the absolute error is 0.2 cm,then the average value should be 68.6 cm,leaving the result denoted as(68.6±0.2)cm.The error is reflected in the last digit of the result.(https://www.daowen.com)
