• wuffah@lemmy.world
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    23 days ago

    The annoying prevalence of this meme suggests to me that an alarming number of people lack even a middle-school understanding of basic arithmetic.

    • Zwiebel@feddit.org
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      22 days ago

      It’s not arithmetic at all, it’s just about convention aka how to communicate math. The author didn’t make themselves clear enough so people misunderstand what calculation they mean.

      • wuffah@lemmy.world
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        22 days ago

        In mathematics and computer programming, the order of operations is a collection of conventions about which arithmetic operations to perform first in order to evaluate a given mathematical expression.

        The order of operations is part of arithmetic. Although, the memes about it are certainly not good mathematics communication.

        • FishFace@piefed.social
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          22 days ago

          There’s a useful distinction to be made. The order of operations is different between conventional written maths, calculators, reverse polish notation, python, etc. In contrast there is no disagreement over what the result of any individual binary operations is

                • FishFace@piefed.social
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                  14 days ago

                  So if you have one “notation definition” as you call it which says that 2+2*3 means ”first add two to two, then multiply by three" and another which says “first multiply two by three, then add it to two”, why on earth do the “rules” have anything further to say about order of operations?

                  • and another which says “first multiply two by three, then add it to two”

                    No we don’t. We have another notation which says to do paired operations (equivalent to being in brackets) first.

                    why on earth do the “rules” have anything further to say about order of operations?

                    Because if you don’t obey them you get wrong answers 🙄