See this:

http://www.cpearson.com/Excel/rounding.htm

Although the atricle mentions Excel 97 it's applicable to all versions of
Excel.

--
Biff
Microsoft Excel MVP


"EggMan903" wrote in message
...
Can anyone tell me why when you enter this into a cell

=-187992-213510-828672.8-1025000+828672.8+213510+1025000+187992

The value comes out 2.32831E-10 when it should clearly be 0. I know I can
format the cell to show as 0 but why does it ever show as 2.32831E-10 when
it
is impossible to have those numbers equal anything other then 0.


Thank you