Add or subtract time - Microsoft Support

Let's say that you need to add two different time values together to get a total. Or, you need to subtract one time value from another to get the total time spent working on a project. As you'll see in the sections below, Excel makes it easy to add or subtract time. Add time Suppose that you want to know how many hours and minutes it will take to complete two tasks. You estimate that the first tas

[newwave8]

:mmではなくhh:mm

[takryou79]

24 時間、60 分、または 60 秒を超える時刻の書式を自動的に設定するには、以下のユーザー定義の表示形式と SUM 関数を使用します。 時間 = \[h\]:mm:ss 分 = \[m\]:ss 秒 = \[ss\]”