Comment on I dunno
Cethin@lemmy.zip 1 day agoYou said “I don’t think you’re right”, and followed it up with “Ill informed”, to a Maths teacher.
About pedantics, not math. Sorry, your realm does not extend into English. Even if you were one of the great mathematicians of our time (which I suspect your not, but I don’t know you) this still isn’t the same domain. It’s tangential to mathematics, but it isn’t mathematics.
I know everything about high school Maths - I teach it
Everything, huh? There’s absolutely nothing you can improve on? Has a teacher ever been wrong (or just uninformed) about a topic in a subject they teach? Does every English teacher know the content of every book? You can be a great teacher and still not know everything. No one knows everything about a subject, even when they’re complete experts. Anyway, this isn’t your subject! This is English, not math. Do you see any formulas, proofs, or equations in these comments?
You think Maths textbooks use very strange logic??
What don’t you get? It being in an algebra textbook does not limit it to the realm of algebra. Numbers are in that textbook too, yet they aren’t exclusive to algebra. I’m reasonably confident that your textbook, where it teaches this, does not say “this is a part of algebra, and no other domain.” If I’m wrong, I’d love to see the citation.
Anyway, unless you provide that proof at the end there, I’m done with this conversation. Goodbye and I hope you have a good time teaching math!
SmartmanApps@programming.dev 1 day ago
Sorry, it most definitely does when it comes to how English is used in Maths
The way we say Mathematical things is 100% Maths
I can improve some badly written textbooks. Probably every Maths teacher can.
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Yes, ones who haven’t looked in the textbook which seems to be the case with a lot of unqualified U.S. Maths teachers
Probably the content of every book they teach 🙄
Teachers do. It comes from teaching the same thing year after year after year
Yes it is! 😂
It’s Mathematical English
Do you see words in Maths textbooks? And the definitions of them? 🙄
Why you keep insisting that Maths textbooks are wrong
And NOT being in any arithmetic book means it’s not part of Arithmetic 🙄
Yep, both Arithmetic and Algebra, as opposed to a(b+c) which is only in Algebra books.
Says person who can’t cite any Arithmetic books it’s in 🙄
Already gave it in the previous post… which you didn’t look at 🙄
Cethin@lemmy.zip 23 hours ago
OK, I said I was done, but one last one.
Here is a distributive law lesson for grade 4. Here’s another, and another. My search was just “when is the distributive law taught in schools”. These were the first results.
It being used in an algebra course doesn’t mean it’s in the domain of algebra. Algebra is also used in calculus, but algebra isn’t the domain of calculus, correct?
It’s algebra when it’s using variables, and you’re solving for an equation. 2(3+4) is arithmetic. 2(x+4)=0 is algebra.
Arithmetic: a branch of mathematics that deals usually with the nonnegative real numbers including sometimes the transfinite cardinals and with the application of the operations of addition, subtraction, multiplication, and division to them.
Algebra: [A] branch of mathematics in which arithmetical operations and formal manipulations are applied to abstract symbols rather than specific numbers.
Note: Algebra includes the use of arithmetic. It being used in algebra does not mean it is part of algebra.
SmartmanApps@programming.dev 23 hours ago
That’s the Distributive Property actually. The dead giveaway is the multiply sign, as in “The Distributive Property of Multiplication over Addition”. There’s no Multiply sign in The Distributive Law, a(b+c)=(ab+ac)
Also The Distributive Property. “The distributive law says that multiplying a number by a group of numbers added together is the same as doing each multiplication separately” - no, the Distributive Property says that.
Welcome to the problem with using the internet and not looking at Maths textbooks
It being taught in Algebra most certainly does mean it’s in the domain of Algebra
It’s all Algebra. You can’t do Calculus if you haven’t learnt Algebra yet, just like you can’ do a(b+c) if you haven’t learnt Algebra yet.
and the rules of Algebra, like a(b+c)=(ab+ac). Arithmetic doesn’t have any rules that aren’t in Algebra, but Algebra does have rules which aren’t in Arithmetic.
I can solve 1+1= without using Algebra
Nope, it’s Algebra
Yep, now substitute x=3 in 2(x+4) and tell me what you get 😂
Yep. Notice how Distribution was not mentioned?? 😂
Yep, such as a(b+c)=(ab+ac)
Soooo, a+b is Algebra, but 2a+3b+4 isn’t Algebra, because it has specific numbers in it?? 😂
Yep, it sure does.
NOT being used in Arithmetic means it’s not part of Arithmetic. 🙄 You know we’ve only had Brackets in Maths for 300 years, and that Arithmetic is much older than that, right?