excel if函数嵌套判断成绩优良中差

excel if函数嵌套判断成绩优良中差

=IF(A2<60,"不及格",IF(A2<70,"合格",IF(A2<80,"中等培余"山中掘,IF(A2<逗核90,"良好","优秀"))))
=IF(A1<60,"差",IF(A1>=80,"良","中"))
=IF(A1<60,"差",IF(AND(A1>=60,A1<80),"中","优"))
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