Hi Cetin,

>>When I put this formula in Excel the result's -2,77556E-17, but if I format the cell to number, the result's 0. When do you format cell to number the same occcur?
>>Btw, Congrats for Personality!
>
>Erick,
>Real concern was not excel or display format, it was only the simpliest way I thought to show the problem. .Net, C, SQL server also have the same problem.
>Cetin

Ok. I'm sorry. 8-D
PS: (SQL Server 2000) I put, in Query Analyser, Select 1*(0.5-0.4-0.1) Result and the Result's .0.