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💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱

@ SmartmanApps @programming.dev

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1220
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2 yr. ago

  • Locked

    I dunno

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  • No, it’s written poorly

    No it isn't

    drive engagement

    The engagement comes from people not remembering the rules of Maths

    (8-5)5

    That's an invalid syntax. it's 5(8-5) or 5x(8-5), nothing else. Why is it invalid? Imagine (8-5)-5 - am I multiplying what's in the brackets by -5 (which gives -15), or subtracting 5 after doing the brackets (which gives -2)? Invalid syntax

    Far easier for most people

    Nope, it's wrong for everyone, due to being an invalid syntax.

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  • Pemdas, parenthesis first, for a total of 3

    Nope, a total of 15.

    Then multiplication

    There isn't any Multiplication, only Addition and Brackets (and Subtraction inside Brackets).

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  • Definitely taught in parts of the US, it’s a regional thing though

    It's a how good is your Maths teacher (who isn't required to have any Maths qualifications) question. The rules are the same everywhere.

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  • In the US: I highly doubt it

    The issue in the U.S. isn't Maths textbooks (same rules as everywhere else), it's poor teaching. U.S. Maths teachers aren't required to have any Maths qualifications, and they've been sliding in world rankings for more than a decade now.

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  • ya this one is super unambiguously PEMDAS

    Spoiler alert: they all are

    the one that has more of an argument is the one with the division of whether a/b(c) is a / (b * c) or (a / b) * c

    No it doesn't, The Distributive Law, a(b+c)=(ab+ac), thus a/b(c)=a/(bxc).

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  • Arguably, there is no objective truth

    Yes there is, just look in Maths textbooks

    since the symbols and rules of mathematics are assigned arbitrarily

    The signs are, the rules aren't.

    are basically a social contract, just like language!

    Nope and nope. It's a tool for calculating things, nothing like a language at all.

    no objective meaning of “objective”

    There is, in a dictionary, just like the rules of Maths are in Maths textbooks

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  • I’m sorry but isn’t this elementary school math?

    No, high school. The Distributive Law isn't taught until Year 7

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  • 2 + 5(8 - 5) = 2 + (5 × 8) + (5 × -5)

    Nope. 2 + 5(8 - 5) = 2 + (5 × 8 - 5 ×5) . a(b+c)=(ab+ac)

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  • Gotta distribute:

    Yes, but...

    2+(8+5)-(5+5)

    You didn't. 2+5(8-5)=2+(5x8-5x5)

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  • then Division or Multiplication

    There's neither, only Addition and Brackets (and Subtraction inside Brackets).

    8-5= 3 3*5=15

    Nope. 2+5(8-5)=2+(40-25), The Distributive Law, a(b+c)=(ab+ac)

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  • most of the ambiguous problems that get passed around

    There aren't any ambiguous ones, and anyone who thinks they're ambiguous has forgotten the rules of Maths.

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  • use the division sign when they should just use a fraction

    There's nothing wrong with using a Division sign, and anyone who thinks there is has forgotten the rules of Maths.

    it is just visible no ambiguity

    There's NEVER any ambiguity. It's what the rules of Maths are for!

    a/b as in a over b

    No, that's a divided by b. (a/b) is a over b.

    idk how to do fractions on the phone if you know tell me!

    No need to, just use Brackets for Fractions.

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  • This one is just…math

    They ALL are

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  • it’s

    a badly

    written

    math

    problem

    No it isn't.

    none of the people writing these better be teachers

    I am, and it's written correctly

    You have to be more clear than this

    It's already 100% clear to everyone who remembers the rules of Maths

    assumed the math problem was one of the ambiguous ones

    NONE of them are ambiguous

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  • What du you mean, not writing it properly?

    They mean they don't remember being taught that is the correct way to write it

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  • it’s like saying 5 apples

    5 baskets each with 3 apples actually

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  • The multiplication is implied

    No it's not. It's explicitly The Distributive Law, a(b+c)=(ab+ac). There is no Multiplication

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  • I have some bad news for you about your education system

    It's not the Education system, it's people not remembering what they were taught

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  • Its because its: 2+5×(8−5)

    No it isn't. It's 2+5(8−5). Different expression, but in this case co-incidentally the same answer. Preface the first 5 with a Division and you get different answers.

    My calculator app

    Was written by a programmer who didn't check the rules of Maths first. The only e-calc I've ever seen give the correct answer is MathGPT

    not writing it properly

    Except it is written properly, as per Maths textbooks

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  • So, brackets: (8-5) is 3

    No, it's 5(8-5)=15

    Multiplication

    There is no Multiplication. Only Addition and Brackets (and Subtraction inside Brackets).

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