在C2中输入或复制粘贴下列公式=IF(OR(A2="",B2=""),"",A2-B2)或=IF(OR(A2=0,B2=0),"",A2-B2)或=IF(AND(A2<>"",B2<>""),A2-B2,"")或=IF(COUNTBLANK(A2:B2)=0,A2-B2,"")或=IF(COUNTBLANK(A2:B2)>0,"",A2-B2)下拉填充
