https://bugs.documentfoundation.org/show_bug.cgi?id=141614

--- Comment #10 from Mike Kaganski <[email protected]> ---
Created attachment 171164
  --> https://bugs.documentfoundation.org/attachment.cgi?id=171164&action=edit
A screenshot from Excel with sum shown with 12 decimals

(In reply to TheWebMachine from comment #9)
> Ex$el and other apps have been adding FPNs for aeons and seem to get
> it working right just fine.

No they don't. They have exactly the same problems. All of them (Excel, Google
Sheets, whatever). It is perfectly normal, that doing *discrete* math, you get
the result normal for *discrete* math. And spreadsheets are just that - tools
doing discrete math with binary 64-bit numbers fast. And they just don't have
things like "0.1" - so they are always doing correct math with what *they*
convert from your input. Whenever you enter '0.1', Calc, Excel, ... get not
0.1, but 0.1000000000000000055511151231257827021181583404541015625 (closest
binary representation), and they do the correct following math with *that*
number.

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