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Anon describes experience
(lemmy.ml)
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this post was submitted on 06 Jul 2025
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(I don't think that was your teachers point at all, but) couldn't the different formulas have produced different rounding errors due to floating point percision?
Excel has a 15 point float, a quadrillionth, which should be enough for anything you were using excel for.
yeah because excel does rounding stuff automatically for you
try entering
0.1 + 0.2 - 0.1 - 0.2 == 0.0in any programming language of your choice and see what happens.Doubtful, but if anything mine would be more accurate. Fewer calculation steps to lose precision on. I think most spreadsheet software fudges floating point precision anyway. A computer programmer may accept that 0.1+0.2 is not 0.3 but an accountant or mathematician would not be having it.
I think she was just shit at maths tbh. As a kid you sort of assume all the teachers know more than you about every subject, and that's not the case at all.
same for chatgpt