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EXCEL 几分几秒几几如何算和、平均值?

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EXCEL 几分几秒几几如何算和、平均值?
例如:
1分18秒22
2分17秒33
1分20秒11
如何计算平均时间
如何计算时间和
平均:
=ROUND(AVERAGE(IF(ISERR(TEXT(TIME(0,LEFT(A1:A100,FIND("分",A1:A100)-1),MID(A1:A100,FIND("分",A1:A100)+1,FIND("秒",A1:A100)-FIND("分",A1:A100)-1)),"[ss]")+(RIGHT(A1:A100,LEN(A1:A100)-FIND("秒",A1:A100)))/100),"",TEXT(TIME(0,LEFT(A1:A100,FIND("分",A1:A100)-1),MID(A1:A100,FIND("分",A1:A100)+1,FIND("秒",A1:A100)-FIND("分",A1:A100)-1)),"[ss]")+(RIGHT(A1:A100,LEN(A1:A100)-FIND("秒",A1:A100)))/100)),2)&"秒"
求和:
=ROUND(SUM(IF(ISERR(TEXT(TIME(0,LEFT(A1:A100,FIND("分",A1:A100)-1),MID(A1:A100,FIND("分",A1:A100)+1,FIND("秒",A1:A100)-FIND("分",A1:A100)-1)),"[ss]")+(RIGHT(A1:A100,LEN(A1:A100)-FIND("秒",A1:A100)))/100),"",TEXT(TIME(0,LEFT(A1:A100,FIND("分",A1:A100)-1),MID(A1:A100,FIND("分",A1:A100)+1,FIND("秒",A1:A100)-FIND("分",A1:A100)-1)),"[ss]")+(RIGHT(A1:A100,LEN(A1:A100)-FIND("秒",A1:A100)))/100)),2)&"秒"
以上两个公式随便在空的单元格中输入,前提都是你的数据是在A1:A100,而且,输入这个公式后要同时按CTRL+SHIFT+ENTER才有效.
刚刚求和搞错了