正常状态应该是6636+44.82-(5853+40.12)+84.94=6680.82-5893.12+84.94即787.7+84.94
6636-5853+(44.82+40.12)不等于6636+44.82-(5853+40.12)
4.7实际上是44.82-40.12得出的
正常状态应该是6636+44.82-(5853+40.12)+84.94=6680.82-5893.12+84.94即787.7+84.94
6636-5853+(44.82+40.12)不等于6636+44.82-(5853+40.12)
4.7实际上是44.82-40.12得出的