excel miscalc?

[estimated]

if cell A1=10.1, and cell A2=10, then the formula A2-A1=.1
should be TRUE, but excel calculates this to
be .9999999999999430, Why is this??

 

[Peo Sjoblom]

See

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

and

http://www.mcgimpsey.com/excel/pennyoff.html

--
For everyone's benefit keep the discussion in the newsgroup.

Regards,

Peo Sjoblom