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💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱

@ SmartmanApps @programming.dev

Posts
26
Comments
418
Joined
3 yr. ago

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

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  • This kind of problem falls under “communicating badly and acting smug when misunderstood”.

    No it doesn't. It falls under adults forgetting the rules of Maths.

    Use parenthesis and the problem goes away

    There is no problem, other than adults who have forgotten the rules.

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

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  • You might be smart

    Smart-arse more like. A serial troll who doesn't actually know what they're talking about.

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

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  • And that’s why people don’t write equations like that

    Says someone who clearly hasn't looked in any Maths textbooks

    If you wrote 6 + 4 / 2 in a paper you’d get reviewers complaining that it’s ambiguous

    Only if their Maths was very poor. #MathsIsNeverAmbiguous

    Working mathematicians never came up with PEMDAS

    Yes they did.

    which disambiguates it without parenthesis

    It was never ambiguous to begin with.

    Noone else does it that way

    Says someone who has never looked in a non-U.S. Maths textbooks - BIDMAS, BODMAS, BEDMAS, all textbooks have one variation or another.

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

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  • 6 + 4 / 2 is 8 instead of 5?

    The fundamental property of Maths that you have to solve binary operators before unary operators or you end up with wrong answers.

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

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  • Maths is not about memorisation

    It is for ROTE learners.

    You are not supposed to remember that the area of a triangle is a * h / 2

    Yes you are. A lot of students get the wrong answer when they forget the half.

    you’re supposed to understand why it’s the case

    Constructivist learners can do so, ROTE learners it doesn't matter. As long as they all know how to do Maths it doesn't matter if they understand it or not.

    You’re supposed to be able to show that any triangle that can possibly exist is half the area of the rectangle it’s stuck in

    No they're not.

    If you’ve understood that once, there is no reason to remember anything because you can derive the formula at a moment’s notice.

    And if you haven't understood it then there is a reason to remember it.

    you can derive the formula at a moment’s notice

    Students aren't expected to be able to do that.

    All maths can be understood and derived like that

    It can be by Constructivist learners, not ROTE learners.

    The names of the colours, their ordering, the names of the planets and how they’re ordered, they’re arbitrary

    No they're not. Colours are in spectrum order, the planets are in order from the sun.

    Maths doesn’t, instead it dies when you apply memorisation

    A very substantial chunk of the population does just fine with having memorised Maths.

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

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  • What’s lazy about learning PEMDAS?

    Nothing. Only people who don't know what they're talking about say that.

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

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  • 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

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

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  • A division is defined as a multiplication

    No it isn't. Multiplication is defined as repeated addition. Division isn't repeated subtraction. They just happen to have opposite effects if you treat the quotient as being the result of dividing.

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

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  • I like the version where these problems are made purposefully ambiguous

    None of them are ambiguous. They all have only 1 correct answer, just like this one only has 1 correct answer. They all test if people remember the order of operations rules. Those who got it wrong, don't.

  • What are some of your unpopular opinions in math? (not about math)

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  • Wow you just disproved all of academic mathematical foundations and philosophy!

    You must be writing from an alternate universe where what I just said isn't already in textbooks and books on the history of Maths. It's certainly what we teach to students

  • What are some of your unpopular opinions in math? (not about math)

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  • Mathematics isn’t some objective truth

    Yes it is. That's why it's such a huge part of Physics.

    it’s just human made structures

    The notation is. The rest is underlying laws of Nature.

    Sometimes we can even apply them to real world situations!

    Maths whole reason for being is to model real world situations.

  • What are some of your unpopular opinions in math? (not about math)

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  • Juxtaposition of a number in front of any expression implies multiplication!

    You think 10 means 1x0?

    Fucking addition?

    No, place value. It's not juxtaposition unless you have brackets and/or pronumerals in the term

  • Does Visual Studio Rot the Mind?

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  • (Not so) Fun fact: I first learnt how to use Xamarin from a book he wrote. It wasn't very good (not unlike Microsoft documentation). He started out just having everything in MainPage, then switched to having separate classes (like MVVM stuff), but didn't point out he had made this switch! The code snippets didn't reflect that this was actually now in a different class! Wait what?? Wait what?? Why is none of this working?! 😂 There was a later chapter about MVVM, but he had switched styles BEFORE that chapter. So when he talks about top-down and bottom-up, well, his book was an explode in the middle approach! 😂

  • Mastodon Engineering front-end job

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  • 'File > New > MAUI' and 'Finding your way around the Fediverse', Tue, Apr 9, 2024, 5:30 PM | Meetup (online)

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  • you can prove it with math

    Not a proof, just wrong. In the "(substitute 0.9999… = x)" step, it was only done to one side, not both (the left side would've become 9.99999), therefore wrong.

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  • It is also frustrating when different calculators have different orders of operations and dont tell you.

    Yeah, but to be fair most of them do tell you the order of operations they use, they just bury it in a million lines of text about it. If they could all just check with some Maths teachers/textbooks first then it wouldn't be necessary. Instead we're left trying to work out which ones are right and which ones aren't. Any calculator that gives you an option to switch on/off "implicit multiplication", then just run as fast as you can the other way! :-)

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