B2=IF(A2<4,"A",IF(A2<=8,"B","C"))向下复制
=IF(A1<4,"a",IF(AND(A1>=4,A1<8),"b","c"))
假如数字在 A1,在 B1 单元格输入以下内容:=IF(A1<4,"A",IF(A1>8,"C","B"))然后下拉
=IF(D1>8,C1,IF(D1>=4,B1,A1))