1 divided by 0 (a 3rd grade teacher & principal got it wrong), Reddit r/NoStupidQuestions
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I saw this Reddit post today saying "My son's third-grade teacher taught my son that 1 divided by 0 is 0. I wrote her an email to tell her that it is not 0. ...
    • Doctor xNoEnglish
      -2•1 year ago

      I suggest you Google “Projectively Extended Real Numbers”.

      • @FooBarrington@lemmy.world
        3•1 year ago

        You mean this one?

        The projectively extended real number line is distinct from the affinely extended real number line, in which +∞ and −∞ are distinct.

        Now tell me, do we usually work with the projectively extended real numbers?