Consider, please, this question. The tags are so general and meta as to, in my view, add no information at all. But, as my finger hovered over the edit button, I found myself unable of thinking of one or more good alternatives. Suggestions?
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Scientific notation would be a good alternative, replacing both number and numerical. They are very meta! The question could possibly be tagged with "floating point" or "notation" too.
But I think that three good tags are probably sufficient: Algorithm, performance and scientific notation.