This standard is applicable to various numerical values obtained from experimental measurements and calculations in scientific technology and production activities. When it is necessary to amend the contract, unless otherwise specified, it shall be carried out according to the rules given in this standard.
GB/T 8170-1987 history
2008GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values
1987GB/T 8170-1987 Rules for rounding off of numerical values