Comment on I dunno

SereneSadie@quokk.au ⁨3⁩ ⁨weeks⁩ ago

• Dekkia@this.doesnotcut.it ⁨3⁩ ⁨weeks⁩ ago

  Counterpoint:

  If kids where taught how to solve them properly we wouldn’t need to dumb down equasions.

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  • SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

    If kids where taught how to solve them properly we wouldn’t need to dumb down equasions

    They are taught how to solve them properly. It’s only adults who’ve forgotten the rules of Maths who get them wrong

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• prole@lemmy.blahaj.zone ⁨3⁩ ⁨weeks⁩ ago

  What? A number next to parenthesis always means multiplication. Are people really not taught this anymore?

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  • SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

    What? A number next to parenthesis always means multiplication

    No, it means distribution, a(b+c)=(ab+ac)

    Are people really not taught this anymore?

    They’re taught distribution yes. It’s only adults who’ve forgotten the rules of Maths who get these wrong

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  • x4740N@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    I live in Australia and don’t recall my school at all teaching me this in maths class

    They taught us stuff like radius and area of a circle but not this

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    • SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

      I live in Australia and don’t recall my school at all teaching me this in maths class

      I’m in Australia, and I remember being taught it, and I teach it.

      people exist that live in other countries and every countries education system is different

      The rules are the same everywhere, only the notation varies (in Germany they use . for multiply and : for divide, and say “dot before slash”, slash being - and +).

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    • prole@lemmy.blahaj.zone ⁨2⁩ ⁨weeks⁩ ago

      I thought math was relatively universal. The US education system may be different, but I’m certain we’re not the only place that does it that way.

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      • SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

        I thought math was relatively universal

        It is

        The US education system may be different

        They have the same rules, but they don’t require Maths teachers to have a Maths qualification (in Australia you have to have a Masters), and they have been sliding in world rankings for more than a decade.

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• Natanox@discuss.tchncs.de ⁨3⁩ ⁨weeks⁩ ago

  Why should anyone do that, an implied multiplication is the normal thing you learn in (I think?) somewhere between 5th to 7th grade. You only add an operator if it’s something else. It’s as basic as PEMDAS.

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  • SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

    an implied multiplication

    There’s no such thing. It’s a Term/Product.

    is the normal thing you learn in (I think?) somewhere between 5th to 7th grade

    Yes, you learn that it’s a Term/Product in Year 7

    You only add an operator if it’s something else

    You never add an operator, or you end up with wrong answers.

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    • Natanox@discuss.tchncs.de ⁨4⁩ ⁨days⁩ ago

      Aaah, got it. So if I see something like “5-(2+4)” I will just remove the subtraction operator and call it a day. Smartman on the internet said so. 🥴

      Also casual reminder not everyone on the internet is a native english speaker. Everyone but you knew what was meant.

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      • SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

        So if I see something like “5-(2+4)” I will just remove the subtraction operator and call it a day

        Nope. Never said anything of the sort.

        Smartman on the internet said so

        No I didn’t, but nice try at a strawman 😂

        not everyone on the internet is a native english speaker. Everyone but you knew what was meant.

        There is no such thing as “implied multiplication” in any language. They are called Terms/Products in whatever language that book is using.

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• SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

  Put a goddamn function sign for the parenthesis

  Why?

  Don’t assume everyone just knows what to do with the parenthesis alone

  Well, everyone was taught what to do with it in high school.

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• kameecoding@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

  Google implied multiplication.

  Do you write 2x or do you write 2 • x?

  That’s implied multiplication, if x= (a+b) then 2x becomes 2(a+b). Implied multiplication

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  • SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

    Google implied multiplication

    There’s no such thing. It’s a Term/Product.

    Do you write 2x or do you write 2 • x?

    2a=(2xa) by definition, and 5(8-5)=(5x8-5x5).

    That’s implied multiplication

    No, that’s a Term/Product.

    Implied multiplication

    Terms/Products

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    • kameecoding@lemmy.world ⁨4⁩ ⁨days⁩ ago

      In mathematics, a product is the result of multiplication,

      I mean, I don’t like to argue about this, since I am not a native English speaker, but there is an implied multiplication there.

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      • SmartmanApps@programming.dev ⁨4⁩ ⁨days⁩ ago

        In mathematics, a product is the result of multiplication,

        or Factoristion, ab+ac=a(b+c) <== a Product of a and (b+c)

        I mean, I don’t like to argue about this

        And yet here you are arguing with someone who is and is a Maths teacher

        there is an implied multiplication there.

        Nope! It’s a Term/Product. There’s no such thing as “implied multiplication” - you won’t find it in any Maths textbook

        Image

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