Unicode: Dot Above Digit?

"Dot Above Digit" in OpenOffice Writer

After a long search I have found the solution in the OpenOffice Writer:

Insert:
Object
Formula (the "Elements" window must appear).
Click on the a with an arrow over it.
Click on the a that has a point above it.
Enter the appropriate number.
Click back into the text area. Finished.

Actually, a shame that poor students even after so many years of Unicode already existing, is not helped to bring this ridiculous little dot for numbers unto the LCD box. The reason (possibly): Brings hardly anything - (for shareholders...).

And why should not the ugly overline also do? -

All right.