可以使用 简单的公式对) 一组单元格 (区域中的数字求和，但在处理多个数字时 ，SUM 函数 更易于使用。 例如，=SUM (A2：A6) 出现键入错误的可能性小于 =A2+A3+A4+A5+A6。 下面是使用两个单元格区域的公式： =SUM (A2：A4，C2：C3) 对区域 A2：A4 和 C2：C3 中的数字求和。

Windows 11 automatically downloads and installs updates to make sure your device is secure and up to date. This means you receive the latest fixes and security updates, helping your device run efficiently and stay protected. To check for updates manually, select Start > Settings > Windows Update . Check for updates.

In your email invite, select Join the meeting now. Continue on this browser: Join a Teams meeting on the web. Open your Teams app: If you already have the Teams app, go right to your meeting. Type your name. Choose your audio and video settings. Select Join now. Depending on meeting settings, you'll get in right away, or go to a lobby where ...

Excel の表に基づいたドロップダウン リストを編集する. ソースの一覧を Excel の表 として設定する場合、一覧からアイテムを追加または削除するだけで、自動的に関連するドロップダウンが更新されます。. 項目を追加する場合は、一覧の最後に移動して ...

Windows 11 Windows 10. Turn on your TV or projector. If you're using a Miracast dongle or adapter, make sure it's plugged in to the display. On your PC, make sure Wi-Fi is turned on. On right side of the taskbar, select the Network icon > Cast > pick your display or adapter. Follow any additional instructions on the screen. Otherwise, you're done.

如何開啟 [電腦健康情況檢查] 在 Windows 中，使用工作列上的 [搜尋] 來搜尋 [電腦健康情況檢查]，然後從結果清單中選取。. 如果有可用的 [電腦健康情況檢查] 更新，您可以快速安裝最新版本。. 如果您沒有安裝電腦健康情況檢查，您可以移至 HTTPs://aka.ms ...

Protect yourself from phishing. Phishing (pronounced: fishing) is an attack that attempts to steal your money, or your identity, by getting you to reveal personal information -- such as credit card numbers, bank information, or passwords -- on websites that pretend to be legitimate. Cybercriminals typically pretend to be reputable companies ...

If you have problems connecting your Surface to a TV, monitor, or projector, try these solutions to identify the issue. Solution 1: Power reset your external display. Solution 2: Check the video input settings. Solution 3: Check the port version setting on the external display. Solution 4: Duplicate or extend your display on the external screen.

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在此示例中，单元格 D2 中的公式表示：IF(C2 = 1, then return Yes, otherwise return No)如你所见，IF 函数可用于计算文本和数值。它还可用于计算错误。不仅可以检查一项内容是否等于另一项内容并返回单个结果，而且还可以根据需要使用数学运算符并执行其他