Q:

How do you subtract time?

A:

Quick Answer

To subtract time, first subtract the hours and then the minutes. If the subtraction of minutes results in a negative answer, increase the number of minutes by 60 and take away 1 from the subtracted number of hours.

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Full Answer

To find the difference between 6 hours and 15 minutes and 2 hours and 10 minutes, first subtract the hours, which gives the result, 4 hours. Then subtract the minutes, which gives the result, 5 minutes. Thus, the subtracted time in this case is 4 hours and 5 minutes.

To find the difference between 6 hours and 15 minutes and 2 hours and 35 minutes, first subtract the hours, which gives the result, 4 hours. Now, subtract the minutes, which gives negative 20 minutes as the result.

Since the number of minutes is a negative number, add 60 to it, which gives 40 minutes as the result. This addition can also be treated as subtracting 20 from 60 to simplify the calculation. Finally, take away 1 from 4 hours, which is the subtracted number of hours. This gives the subtracted time as 3 hours and 40 minutes.

Alternatively, add 60 to 15 minutes, which is equal to 75 minutes and subtract 1 from 6 hours, which is equal to 5 hours. Now, subtract the hours, that is 5 minus 2 and the minutes, that is 75 minus 35. This also gives the subtracted time as 3 hours and 40 minutes.

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