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.
addition and subtraction, left to right is correct
You can do addition and subtraction in any order and it's still correct
Wouldn’t we just assume function expressions are always “in parenthesis”?
No, because factorised Terms also are, ab+ac=a(b+c).
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).
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.
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? 🙄
O - oxponent?
To the Order of. 2² is 2 to the order of 2
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
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.
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 +).
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
No don't. That rule was changed more than 130 years ago. a+b/c+d=a+(b/c)+d, Division before Addition