A.擬舍棄數(shù)字的最左一位數(shù)字小于5,則舍去,即保留的各位數(shù)字不變
B.擬舍棄數(shù)字的最左一位數(shù)字大于5,而其后跟有并非全部為0的數(shù)字時,進1
C.擬舍棄數(shù)字的最左一位數(shù)字是5,而右邊無數(shù)字或皆為0時,若所保留的位數(shù)字為奇數(shù),則進1
D.擬舍棄數(shù)字的最左一位數(shù)字是5,而右邊無數(shù)字或皆為0時,若所保留的位數(shù)字為偶數(shù),則舍棄
E.擬舍棄數(shù)字的最左一位數(shù)字是5,而其后跟有并非全部為0的數(shù)字時,則進1