=IF(MOD(LEFT(RIGHT(A3,2)),2),"单","双")也可以表示为=IF(MOD(LEFT(RIGHT(A3,2),1),2)=1,"单","双")
假设A3=5667
LEFT(RIGHT(A3,2))=LEFT(RIGHT(A3,2),1)表示取A3倒数第二位
RIGHT(A3,2)表示:A3单元格的数字从右开始取两位即=67,
LEFT(RIGHT(A3,2),1)=LEFT(67,1)=6
也可以表示为=IF(MOD(6,2)=1,"单","双"),即表示(当倒数第二位被2除
余数等于1时,成立“单“,否则”双“)