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Re:0.999...= 1 by ssivark on Tuesday April 28, 2020 @04:19AM (#23004834)
> The point is that in elementary school arithmetic, you define addition, multiplication, subtraction, division, decimals, and equality, but you never define "...". Until you've defined "...", it's just a meaningless sequence of marks on paper. You can't prove anything about it using arithmetic, or otherwise.

Sure, but the point of "elementary school" arithmetic is not "elementary" arithmetic, as a mathematician would define it :-)

The goal is to teach people to reason by matching patterns. Deductive/Inductive reasoning can slowly proceed from that, as they try to frame their intuition for patterns into increasingly more general abstractions.

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