A.若被舍去部分的數(shù)值大于所保留的末位數(shù)的0.5,則末位數(shù)加1
B.若被舍去部分的數(shù)值小于所保留的末位數(shù)的0.5,則末位數(shù)加1
C.若被舍去部分的數(shù)值小于所保留的末位數(shù)的0.5,則末位數(shù)不變
D.若被舍去部分的數(shù)值等于所保留的末位數(shù)的0.5,則末位數(shù)湊成偶數(shù),即當末位數(shù)為偶數(shù)(0,2,4,6,8)時則末位數(shù)不變,當末位數(shù)為奇數(shù)(1,3,5,7,9)時則末位數(shù)加1