Subtracting hours from hours results in negative -00:00 instead of 00:00.

Question

I have problems subtracting hours from hours.
If I subtract 01:00 from 01:00 , the result is negative -00:00. This makes formatting rule look negative because I want it to turn green when my result averages to 00:00.
The number -5,55112E-17 is a general formatted value of the result -00:00.

I have searched a lot for a solution, but all google gives me is the solution for calculating negative time with the 1904 date system.

I hope someone can help me with a solution or work-around of my problem.

从小时数减去小时数将得到负的-00：00而不是00:00。