举例 已知 A0=0.582,A=40,A2=20,A3=595 计算A1、A2、A的偏差 ①等公差法: TD_0.12 0.07 取:A1=4007,42=20 +0.07 为协调环 A,=40+007=40.035±0.035 A,=20#007=20.035±0.035 A A=0.5012=0.56±0.06 A A 2 A3=A+A2-A=40035+20035-0.56=5951 ∴A=5951±0035=595025举例： 已知： 0.5 , 40, 20, 59.5 1 2 3 0.1 2 0 = 0 = = = + A A A A 计算A1、A2、A3的偏差 ① 等公差法： 0.07 3 0 0.12 = =  m T Ti A1 A2 A3 A0 取： 0.07 2 0 0.07 1 0 40 , 20 + + A = A = A3为协调环 0.5 0.56 0.06 20 20.035 0.035 40 40.035 0.035 0.1 2 0 0 0.0 7 2 0 0.0 7 1 0 = =  = =  = =  + + + A A A A3 = A1 + A2 − A0 = 40.035+ 20.035−0.56 = 59.51 0.045 3 5 0.025 59.51 0.035 59. +  A =  = −