方法1: =IF(AND(A1>=100,A1<=500),500,IF(A1>500,700,100))方法2:=LOOKUP(A1,{0,100,501},{100,500,700})
B1输入公式=if(and(a1>100,a1<500),500,if(a1<100,100,700))
输入公式=IF(A1<100,100,IF(AND(A1>100,A1<500),500,700))
=IF(A1<100,100,IF(A1<=500,500,700))