=IF(A1<5,10,IF(A1<=10,((A1-5)*3+10),((A1-10)*2+25)))
=if(A1<=5,10,if(A1<=10,10+(A1-5)*3,if(A1<=20,10+15+2*(A1-10),"")))
if函数来解决吧,假设A1是你的数据=IF(A1<=5,10,IF(AND(A1>6,A1<10),A1*3,IF(AND(A1>11,A1<20),A1*2)))
=IF(A1<=5,10,IF(A1<=10,A1*3,A1*2))