=sum(a1:a7)/counta(a1:a7)counta()计算区域内非空单元格数量或者=AVERAGE(a1:a7) 这个可以直接算出平均值
=SUM(A1:A7)/COUNT(A1:A7)
在A8输入=AVERAGE(A1:A7)
=AVERAGEA(A1:A7)
=AVERAGE(A1:A7)