Comment on A fake Facebook event disguised as a math problem has been one of its top posts for 6 months

• Cethin@lemmy.zip ⁨1⁩ ⁨month⁩ ago

  I hate most math eduction because it’s all about memorizing formulas and rules, and then memorizing exceptions. The user above’s system is easier to learn, because there’s no exceptions or weirdness. You just learn the rule that division is multiplication and subtraction is addition. They’re just written in a different notation. It’s simpler, not more difficult. It just requires being educated on it. Yes, it’s harder if you weren’t obviously, as is everything you weren’t educated on.

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  • Mistic@lemmy.world ⁨1⁩ ⁨month⁩ ago

    That’s because they aren’t teaching math. They’re teaching “tricks” to solve equations easier, which can lead to more confusion.

    Like the PEMDAS thing that’s being discussed here. There’s no such thing as “order of operations” in math, but it’s easier to teach that there is.

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    • SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

      they aren’t teaching math.

      Yes we are. Adults forgetting it is another matter altogether.

      There’s no such thing as “order of operations” in math

      Yes there is! 😂

      Do you think I’m wrong?

      No, I know you’re wrong.

      If so, why?

      If you don’t solve binary operators before unary operators you get wrong answers. 2+3x4=14, not 20. 3x4=3+3+3+3 by definition

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      • Mistic@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

        Yes we are

        Yes and no. You teach how to solve equations, but not the fundamentals. Fundamentals, most of the time, are taught in universities. It’s easier that way, but doesn’t mean it’s right. People call it math, but it’s not really math

        Yes there is!

        Nope.

        There’s only commutation, association, distribution, and identity. It doesn’t matter in which order you apply any of these properties, the result will stay correct.

        2×2×(2-2)/2 = 2×(4-4)/2 = 1×(4-4) = 4-4 = 0

        As you can see, I didn’t follow any particular order and still got the correct result. Because no basic principle was broken.

        Or I could also go

        2×2×(2-2)/2 = 4×(2-2)/2 = 4×(1-1) = 4×0 = 0

        Same result, completely different order, yet still correct.

        My response to the rest goes back to the aforementioned.

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• iglou@programming.dev ⁨1⁩ ⁨month⁩ ago

  I’m just confused as to how that is not common knowledge. The country I speak of is France, and we’re not exactly known for our excellent maths education.

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