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A multiple choice question where all the answers are wrong, says nothing about math or the mathematical understanding of the general population.
This is engagementbait and its hooked you too.
No u
im had
No, you’re Hildegarde
no u
ur trans now not sorry
That’s normal for multiple choice, and sometimes all the answers are correct. You’re supposed to pick the most correct based on the viewpoint of the course.
We can assume it’s 16 because the audience weren’t taught order of operations. (2+2)*4
That’s normal for multiple choice
No it isn’t.
sometimes all the answers are correct
Not in multiple choice they aren’t. At best you might have “D) All of the above” if there’s genuinely more than 1 answer
We can assume
Someone screwed up somewhere, and there will be lots of complaints from students. Despite it being “you only had 1 job”, proofreaders still miss things sometimes…
All I can assume from you is that you never did multiple choice questions in University.
There’s a reason essay questions are considered easier.
All I can assume from you is that you never did multiple choice questions in University
That would be a wrong assumption.
There’s a reason essay questions are considered easier.
They’re not! 😂
Was this multiple choice? Because if 10 isn’t an option, people are just going to answer whatever.
It’s not a bad analogy for american democracy. None of the options are correct, so you either pick the wrong answer that makes some amount of sense or write in the correct answer and be completely ignored in the tally of results.
This is why I write it as 2+(2x4). The parentheses aren’t techniclly necessary, but they do make it clearer to people who haven’t been in a school for 35 years.
just get rid of the x. 2+(24) = 26
Why write more than necessary? Surely 26 = 26 is enough.
because i like getting rid of the x. it reminds me of her. like flushing.
This isn’t even math, just convention on rules for order of operations.
Order of operations only has one rule: Bedmas (or pemdas if you’re not from north america)
Huh it was always pemdas in both highschool and college in new England for me… they were also always parentheses. ‘Brackets’ only reffered to ‘[ ]’ which were reserved for matrices or number sets, eg 2*[2,5,8]+2= [6,12,18]
If you look at the arguments on math forums, you’ll see that there isn’t just one rule.
It is a convention, and different places teach different conventions.
Namely, some places say thatPEDMASis a very strict order. Other places say that it isPE D|M A|S, where D and M are the same level and order is left-to-right, and same with addition vs subtraction.
And others, even in this post, say it’sPEMDAS, which I have heard before.“Correct” and “incorrect” don’t apply to conventions, it’s simply a matter of if the people talking agree on the convention to use. And there are clearly at least three that highly educated people use and can’t agree on.
different places teach different conventions
But they all teach the same rules
some places say that PEDMAS is a very strict order
Which is totally fine and works
Other places say that it is PE D|M A|S,
Which is also totally fine and works
even in this post, say it’s PEMDAS
Also totally fine and works
it’s simply a matter of if the people talking agree on the convention to use
No-one has to agree on any convention - they can use whatever they want and as long as they obey the rules it will work
can’t agree on
Educated people agree that which convention you use doesn’t matter.
That’s not true Here is an example:
8÷2x4
PEMDAS: 8÷2x4 = 8÷8 = 1
PEDMAS: 8÷2x4 = 4x4 = 16
PE M|D A|S: 8÷2x4 = 4x4 = 16
And thats not even getting into juxtaposition operations, where fields like physics use conventions that differ from most other field.but you’re missing the point. It could be SAMDEP and math would still work, you’d just rearrange the equation. Just like with prefix or postfix notation. The rules don’t change, just the notation conventions change. But you need to agree on the notation conventions to reach the same answer.
That’s not true
Yes it is
PEDMAS: 8÷2x4 = 4x4 = 16
Yep.
PEMDAS: 8÷2x4 = 8÷8 = 1
Nope. PEMDAS: 8x4÷2 = 32÷2 = 16. What you actually did is 8÷(2x4), in which you changed the sign in front of the 4 - 8÷(2x4)= 8÷2÷4 - hence your wrong answer
PE M|D A|S: 8÷2x4 = 4x4 = 16
Yep, same answer regardless of the order 🙄
And thats not even getting into juxtaposition operations,
Which I have no doubt you don’t understand how to do those either, given you don’t know how to even do Multiplication first in this example.
where fields like physics use conventions that differ from most other field
Nope! The obey all the rules of Maths. They would get wrong answers if they didn’t
you’re missing the point
No, you are…
It could be SAMDEP and math would still work
No it can’t because no it wouldn’t 😂
you’d just rearrange the equation.
Says someone who didn’t rearrange “PEMDAS: 8÷2x4 = 8÷8 = 1” and got the wrong answer 😂
The rules don’t change
Hence why “PEMDAS: 8÷2x4 = 8÷8 = 1” was wrong. You violated the rule of Left Associativity
Ok, then explain prefix and postfix, where these conventions don’t apply. How can these be rules of math when they didn’t universally apply?
Says someone who didn’t rearrange "PEMDAS
The order of operations tells us how to interpret an equation without rearranging it. When you pick a different convention, you need to rearrange it to get the same answer. What you did was rearrange the equation, which you can only do if you are already following a specific convention.
No it can’t because no it wouldn’t 😂
All conventions can produce the correct answer, when appropriately arranged for that convention, because the conventions are not laws of mathematics, they are conventions.
Nope! The obey all the rules of Maths. They would get wrong answers if they didn’t
They obey the laws of math. Conventions aren’t laws of math, they’re conventions. And a quick Google search will tell you that not everyone puts juxtaposition at a higher precedent than multiplication; it’s a convention. As long as people are using the same convention, they’ll agree on an answer and that answer is correct.
You can be mean all you like, that doesn’t change the nature of conventions
Ok, then explain prefix and postfix, where these conventions don’t apply
The conventions don’t apply, the rules still apply. Maths notation and the rules of Maths aren’t the same thing.
How can these be rules of math when they didn’t universally apply?
The rules do universally apply 🙄
The order of operations tells us how to interpret an equation without rearranging it
Yep, and you showed you don’t know the rules 🙄
When you pick a different convention, you need to rearrange it to get the same answer
Not necessarily, though it makes it easier (but also leads a lot of people to make mistakes with signs, as you found out 😂 )
What you did was rearrange the equation
To show you how to correctly do “Multiplication first”. 🙄
which you can only do if you are already following a specific convention
Which you didn’t, hence why you ended up with a wrong answer. 🙄 There is no textbook which says put the multiplication in Brackets if doing “Multiplication first”, none.
because the conventions are not laws of mathematics, they are conventions
And putting the Multiplication inside Brackets isn’t a convention anywhere 🙄
They obey the laws of math. Conventions aren’t laws of math, they’re conventions
Yep, and you ignored both, hence your wrong answer 🙄
And a quick Google search will tell you that not everyone puts juxtaposition at a higher precedent than multiplication
And a quick look in the Google support forum will show you many people telling them that is wrong, and Google just closes the incident 🙄
it’s a convention
No it isn’t. It’s against the rules. 🙄 Again, you won’t find this alleged “convention” in any Maths textbook
As long as people are using the same convention, they’ll agree on an answer and that answer is correct
Unless they disobeyed the rules, in which case they are all wrong 🙄
You can be mean all you like, that doesn’t change the nature of conventions
And you can be as ignorant of the rules and conventions of Maths as much as you want, and it’s not going to change that your answer is wrong 🙄
The one response you got was just like, “But there’s just ONE rule.” totally missing your point.
The annoying prevalence of this meme suggests to me that an alarming number of people lack even a middle-school understanding of basic arithmetic.
deleted by creator
But if enough people are doing it wrong, that means it’s common usage, and therefore it’s right!
-The English Language
Which is perfectly fine for languages:)
Let’s just agree to disagree, then. /s
SADMEP
Solve for x
Here you go. By the commutative property of multiplication:
2 + 2x4 = 2 + 24x
Rearranging this leads to:
x = -1/12
which means that x is the limit of the diverging series:
x = 1 + 2 + 3 + …
Wouldnt 2x4 actually equate to 2 * 4 * x not 24 * x? So it would be 8x?
Regular multiplication? Sure. But this is Rustydrd multiplication, which assigns different values to products I don’t like.
Null.
Some programming languages do away with operator precedence for a big parsing speed boost. J/APL and stack languages are “best known”. in J, right to left parsing,
16 = 4 * 2 + 2
Assuming an equation with no context is anything but standard mathematics is peak “well, technically”
There’s big advantages to no precedence rules. You don’t have to remember them all. Haskell/SML family create nightmares from trying to have user defined operators with precedence “value” of 0-10. Operators are extremely powerful syntax simplification, but precedence rules makes them too hard to mentally parse.
Fourg
wrong sub should be a shitpost
People who are responsible for the Wayland protocol: “This seems like a good idea, but also give veto rights to weirdos.”
