Re: [libreoffice-users] The way SUM works

The number displayed in a Calc cell is limited in decimal places by the
formatting preference.  Set the number format for the cells to show more
decimal places and see the results.

In your case the sum calculation is based on the actual multiplication
result in the individual cells to a large number of decimal places, and
then the displayed sum shortened to show the decimal places set by the
formatting preference.

The (sum of the original entries) multiplied by (1,22) displayed to two
decimal places is not likely to display exactly the same as the sum of
(individual entries) multiplied by (the same multiplier).

Take a look at the 'ROUND' function.

On Tue, Dec 20, 2011 at 1:28 PM, Dominik Wnęk <dominik@ode2.com> wrote:

> Hello,
>
> I have a problem with the way SUM works. At first I thought this was a
> bug, but then I saw Numbers on my iPad doing the same thing, so now I
> believe this is by design, but I have no idea why and how I can work around
> this.
>
> Take a look at this example:
>
> http://www.ode2.com/images/**libreoffice_sum.tiff<http://www.ode2.com/images/libreoffice_sum.tiff>
>
> The number format is currency (Polish Zloty), the numbers in the left
> column are entered by hand, the ones in the right one are calculated by
> multiplying the left number by 1,22.
>
> The sum of the numbers in the right-hand column should be -1199,62, but it
> is off by 0,02 zł. It's pretty obvious this is because the program sums the
> numbers it has in memory and not the ones it displays.
>
> If this behaviour is correct, how can I work around this? I just spent 40
> minutes trying to find out why my balance is wrong only to find out the
> sums I was doing were giving me incorrect amounts :/
>
> Thanks,
>
> --
> Dominik
>
>
>
>
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