你描述的条件“大于0或小于2000”会使之前的条件与之后的条件无效,根据你的意思,我想你应将其改为大于0且小于等于2000,这样的话可:在b1单元格中输入公式=if(a1<=0,1,if(a1<=2000,0.5,0))
b1单元格输入=if(a1<=0,1,if(a1<=2000,0.5,0))2000没说,看是否去掉2000前的等于号
=IF(A1<=0,"1",IF(A1>2000,"0","0.5"))
b1输入=if(a1<=0,1,if(a1<=2000,0.5,0))