Comment on I dunno

• SmartmanApps@programming.dev ⁨2⁩ ⁨days⁩ ago

  Nope, that’s wrong

  You think Maths textbooks are wrong?? 😂

  Image

  Image

  See www.wolframalpha.com/input?i=10%2F2(2%2B3) for reference

  See Maths textbooks for reference 😂

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  • moriquende@lemmy.world ⁨1⁩ ⁨day⁩ ago

    Yes, the math textbook says exactly what I said, that it’s a multiplication. There’s no mention of it being a separate operation taking precedence. The parentheses in your example are added for clarity.

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    • SmartmanApps@programming.dev ⁨1⁩ ⁨day⁩ ago

      Yes, the math textbook says exactly what I said, that it’s a multiplication

      Nope, they say it’s Brackets…

      5(36)=(5x36) <== Brackets

      bc=(3x4) <== Brackets

      There’s no mention of it being a separate operation taking precedence

      It’s part of the Brackets step. I have no idea what “separate operation” you’re talking about

      The parentheses in your example are added for clarity

      Nope. They are there because The Distributive Law requires them. “those who study algebra are required to make their calculations conform to these laws”.

      Whether you give priority to juxtapositions is a

      A literal Law of Maths. See textbook.

      the consensus being to just use parenthesis around when writing in a single line to avoid confusion.

      No it isn’t. You won’t find any Maths textbook that says that.

      However, there is no distribution step taking precedence

      There is the Brackets step, including Distribution, taking precedence, as per Maths textbooks 🙄

      as you mentioned

      As the textbooks mention

      the whole debate centers around whether the writer was too lazy to add parenthesis

      The only debate is by people like you ignoring what is taught in Maths textbooks.

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      • moriquende@lemmy.world ⁨1⁩ ⁨day⁩ ago

        Nowhere in your “proof” screenshots does it say anything about distribution being part of the brackets step. Distribution is a method that can help solve equations, but it isn’t required. If you have 2(3+5) you’re free to solve it as 2*3+2*5 or as 2*8, whichever is easiest. That is because juxtaposition means multiplication and nothing else.

        Math textbooks almost universally will either use clear brackets or simply write divisions in 2 lines, which avoids the confusion altogether.

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