在Sheet4中输入:=SUMIF(Sheet1!A1:A10,"电视",Sheet1!B1:B10)+SUMIF(Sheet2!A1:A10,"电视",Sheet2!B1:B10)+SUMIF(Sheet3!A1:A10,"电视",Sheet3!B1:B10)A列为商品名,B列为数量,你可以将“电视”换成其它商品名进行统计。
sheet4 中输入公式:=sum('sheet1:sheet3'!a1)
sheet4 中输入公式:=sum(sheet1:sheet3!a1)