Skip Navigation

💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱

@ SmartmanApps @programming.dev

Posts
26
Comments
418
Joined
3 yr. ago

  • Locked

    I dunno

    Jump

  • PE(MD)(AS) Now just remember to account for those parentheses first

    Those Brackets don't matter. I don't know why people insist it does

  • Locked

    I dunno

    Jump

  • order of appearance is ‘the rule’ when commutative properties apply

    That's because students often make mistakes with signs when they do it in a different order, so we tell them to stick to left to right

  • Locked

    I dunno

    Jump

  • I did not flip any signs

    Yes you did! 😂

    merely reversed the order in which the operations are written out

    No, merely reversing the order gives -3-2+1 - you changed the signs on the 1 and 3.

    If you read the right side from right to left, it

    Starts with -3, which you changed to +3

    it has the same meaning as the left side from left to right

    when you don't change any of the signs it does 😂

    Hell, the convention that the sign is on the left is also just a convention

    Nope, it's a rule of Maths, Left Associativity.

  • Locked

    I dunno

    Jump

  • Right, because 1-2-3=3-2-1

    No, 1-2-3=-3-2+1. You changed the signs on the 1 and the 3.

  • Locked

    I dunno

    Jump

  • addition and subtraction, left to right is correct

    You can do addition and subtraction in any order and it's still correct

  • Locked

    I dunno

    Jump

  • Social conventions are real, well defined things

    So are the laws of nature, that Maths arises from

    Some mathematicians like to pretend they aren’t, while using a truckload of them; that’s a hypocritical opinion

    No, you making false accusations against Mathematicians is a strawman

    That’s not to say you can’t change them

    You can change the conventions, you cannot change the rules

    But all of basic arithmetic is a social convention

    Nope, law of nature. Even several animals know how to count.

    you can redefine the numbers and operations any time you want too

    And you end up back where you started, since you can't change the laws of nature

  • Locked

    I dunno

    Jump

  • I mean, arithmetic order is just convention

    Nope, rules arising from the definition of the operators in the first place.

    not a mathematical truth

    It most certainly is a mathematical truth!

    But that convention works in the way we know, yes, because that’s what’s… well… convention

    The mnemonics are conventions, the rules are rules

  • Locked

    I dunno

    Jump

  • this is just a writing standard that is globally agreed on

    No, it's a universal rule of Maths

    The writing rules are defined by humans not by natural force

    Maths is for describing natural forces, and is subject to those laws

    That one thing and another thing are two things, is a rule from nature

    Yep, there are even some animals who understand that, and all of Maths is based upon it.

  • Locked

    I dunno

    Jump

  • Some people insist there’s no “correct” order for the basic arithmetic operations.

    And those people are wrong

    And worse, some people insist the correct order is parenthesis first, then left to right

    As per Maths textbooks

    Both of those sets of people are wrong

    All Maths textbooks are wrong?? 😂

  • Locked

    I dunno

    Jump

  • And in some languages a number can be used as a name of a variable or a function

    Not in Maths it can't

    so it can be anything really

    No, it can only be a Factorised Term, ab+ac=a(b+c). You also can't call a function by any letter that you've used as a pronumeral

  • Locked

    I dunno

    Jump

  • Wouldn’t we just assume function expressions are always “in parenthesis”?

    No, because factorised Terms also are, ab+ac=a(b+c).

  • Locked

    I dunno

    Jump

  • The way I was taught growing up, brackets are [these]. Parenthesis are (these)

    They're all brackets. Parentheses is actually the part inside the ().

  • Locked

    I dunno

    Jump

  • the original question was arithmetic

    No, it's actually Algebra. There is no a(b+c) in Arithmetic

  • Locked

    I dunno

    Jump

  • You are one of them bc you do not know what an equation is.

    You are one of the people who doesn't know what a(b+c) is

    There is no algebra here

    Yes there is, 5(8-5).

    This is arithmetic

    There's no a(b+c) in Arithmetic

  • Locked

    I dunno

    Jump

  • Implications or assignment?

    Umm, neither?? 😂

    They didn’t specify notation

    a(b+c)=(ab+ac) is taught in Algebra, The Distributive Law, it can't mean anything else - it's the reverse operation to Factorising ab+ac=a(b+c).

  • Locked

    I dunno

    Jump

  • Technically not algebra, right?

    No, it actually is Algebra. The Distributive Law isn't taught to students until they start on Algebra.

    This is just arithmetic

    There's no a(b+c) in Arithmetic.

  • Locked

    I dunno

    Jump

  • That’s not even an equation, just basic arithmetic

    Basic Algebra actually. Students aren't taught the Distributive Law until they start on Algebra

  • Locked

    I dunno

    Jump

  • the 5 next to the parentheses indicates multiplication

    No, it indicates Distribution, a(b+c)=(ab+ac), 5(8-5)=(5x8+5x5).

  • Locked

    I dunno

    Jump

  • It should be limited - like Orders - to only Multiplication and Addition

    Because you don't want people to know when to do Division and Subtraction? 😂

    Because division is the same operation as multiplication

    No it isn't, but they are both binary operators.

    they have the same “weight” in the order of operations (meaning, you do them left-to-right)

    And where are they going to do Division and Subtraction in the left to right if you've left them out? 🙄