Current Events > What does 8÷2(2+2) = ?

(+) Yeah! (+)

y'all failed high school algebra. it's 1. putting it into a calculator as anything other than a fraction will give you the wrong answer.

GameGodOfAll posted...

HOW IS THIS A 100+ POST TOPIC?!

Look at the average CE topic. Do you really think the finer points of math really held.

Granted, how the fuck often do you think any of us USE textbook math.
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kayoticdreamz posted...

I haven't done algebra in years, help me out. how did the 4 change sides of the "/"? see bolded

Sorry I didn't explain that part. X/2 * 4 is equal to 4 * X/2 by the Associative Property. The Associative Property states that if you have 3 numbers multiplied together, their product is the same regardless of the order. Since Division is really just Multiplication backwards it works with division too, at least in this instance. Then I forget the name of the property but a * b/c = (a * b) / c which is what I did in that step to group 4 and X together divided by 2.

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1
There is really only two numbers in the equation. You have 8 and you have 2(2+2).

you can make the 2(2+2) become 4(1+1) or 1(4+4) and theyd all be the same numbers.

If we wanted to, we could turn the 8 into something like 4(2), it is still the number 8 and would be treated as such.

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uwnim posted...

1
There is really only two numbers in the equation. You have 8 and you have 2(2+2).

you can make the 2(2+2) become 4(1+1) or 1(4+4) and theyd all be the same numbers.

If we wanted to, we could turn the 8 into something like 4(2), it is still the number 8 and would be treated as such.

symbolab.com/solver/algebra-calculator/8%5Cdiv2%5Cleft(2%2B2%5Cright)

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Caelthus posted...

That's not correct. 2(4) does *not* have the privilege of parenthesis first - Parenthesis that cover a single number like this merely indicates multiplication.
Wolframalpha also agrees. https://www.wolframalpha.com/input/?i=8%C3%B72%282%2B2%29+
For a math major, you should know something so pretty basic.

Trust in Wolframalpha

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Kami_no_Kami posted...

Parentheses
Exponent
Multiplication
Division
Addition
Subtraction

You perform both multiplications before dividing it by 8.

Multiplication and division are on the same tier. You solve it from left to right. Same with addition and subtraction.

88
8(2+2+2+2)
82(2+2)


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The order of operations goes like this: PEMDAS
Parentheses.
Exponents.
Multiplication and Division, from left to right.
Addition and Subtraction, from left to right.

As written, the expression 8 2(2 + 2) is ambiguous. If the expression represents a fraction with 8 in the numerator and 2(2 + 2) is in the denominator, then we have:
8 2(2 + 2)
8 / (2(2 + 2))
8 / (2(4))
8 / 8
1

If, on the other hand, 8 2 really just means "eight divided by two", then we get this instead:
8 2(2 + 2)
8 2(4)
4(4)
16

Without additional information or context, it isn't possible to say which is the correct interpretation of the expression.

Can't believe so many are failing so hard at simple math.

R1masher posted...

Eleventy

Yes?

darkmaian23 posted...

The order of operations goes like this: PEMDAS
Parentheses.
Exponents.
Multiplication and Division, from left to right.
Addition and Subtraction, from left to right.

As written, the expression 8 2(2 + 2) is ambiguous. If the expression represents a fraction with 8 in the numerator and 2(2 + 2) is in the denominator, then we have:
8 2(2 + 2)
8 / (2(2 + 2))
8 / (2(4))
8 / 8
1

If, on the other hand, 8 2 really just means "eight divided by two", then we get this instead:
8 2(2 + 2)
8 2(4)
4(4)
16

Without additional information or context, it isn't possible to say which is the correct interpretation of the expression.

As written it is not ambiguous and is definitely not the fraction 8/(2(2+2)) if it was it would be written like that. It's the second one, no context or additional information needed. This is math, context doesn't matter cause math always works the same way.

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le-seul-dieu posted...

y'all failed high school algebra. it's 1. putting it into a calculator as anything other than a fraction will give you the wrong answer.

Obviously whatever high school you went to needs to be defunded.

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le-seul-dieu posted...

y'all failed high school algebra. it's 1. putting it into a calculator as anything other than a fraction will give you the wrong answer.

This is what the Dunning-Kruger effect looks like. A communist thinking he knows math.

82(2 + 2) = 8/2(2+2), these are the same equation.

8/2(2+2) = 8/2(4)
8/2(4)=8/8
8/8=1

or

8/2(2+2)=4/1(2+2)
4/1(2+2)= 4/1(4)
4/1(4)= 4/4
4/4=1

really not surprising some of y'all can't do math.

le-seul-dieu posted...

82(2 + 2) = 8/2(2+2), these are the same equation.

8/2(2+2) = 8/2(4)
8/2(4)=8/8
8/8=1

or

8/2(2+2)=4/1(2+2)
4/1(2+2)= 4/1(4)
4/1(4)= 4/4
4/4=1

really not surprising some of y'all can't do math.

The irony here is that you're the one who can't do math. 8/2(4) is the same as (8/2)(4) and 4/1(4) is the same as (4/1)(4). You seem to think it magically turns into 8/(2*4) and 4/(1*4). Some of us do this shit for a living. Get a clue.

16 with assumed multiplication.
1 with continued division.

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this guy is big mad that his economics and math skills are worse than mine

le-seul-dieu posted...

82(2 + 2) = 8/2(2+2), these are the same equation.

Assuming that 8/2(2+2) is supposed to represent this:

https://i.imgur.com/fcslGM0.png

No, they're not the same expression.

If you were to replace the "" sign in 82(2 + 2) with a fraction, the expression would look like this:

https://i.imgur.com/wICduCg.png

8/2(2+2) rewritten horizontally would be (8)(2(2 + 2)). When solving fractions, the numerator and denominator are both treated as if there's a set of parenthesis around each of them.

Edit: In other words, you can't always just rotate an expression 90 degrees around the division symbol and call it a day.

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Harpie posted...

no?

Work on the inside of the parentheses first
(2+2) = 4

And because 2 is outside the parentheses, we multiply that by 4
2(4) = 8

8/8=1

The answer is always one

It's 16.

You were right on step one!

Parenthesis!

2+2 = 4

Problem now is 8 Divided by 2 x 4

No Exponents! So we go to Multiplication/Division. These share order weight. So it's left to right for all multiplication and division.

8 divided by 2 = 4

So we got 4 x 4 left. Or 4(4) if you wish.

This equals 16.

Nothing is left so we can ignore Addition/Subtraction which again share order weight.

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People still fall for this? The contagion is higher than covid-19

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The answer I got is 1.

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You know what?

Fuck it, the answer is 40.

Deal with it, nerds.

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ITT: A math major reckd himself

Im a math teacher, and the answer is 16

But I will also say that the way the problem is written is stupid.

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It seems like people are making the same mistake which is either a teaching error or an error in the way the math problem is expressed.

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Apocalypso posted...

It seems like people are making the same mistake which is either a teaching error or an error in the way the math problem is expressed.

If it's written in fraction form,
8
_____
2(2+2)

Then the answer is 1 because you divide the numerator by the denominator. But it's not written in fraction form, it's written using operators only and by order of operations you get 16.

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Drumiester posted...

If it's written in fraction form,
8
_____
2(2+2)

Then the answer is 1 because you divide the numerator by the denominator. But it's not written in fraction form, it's written using operators only and by order of operations you get 16.

This is like totally true

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Only big brain big pp chads will understand the answer is 27

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16 because we were told that pemdas was kinda wrong

8/2 = 4 then multiply it by (2+2) which is 16

also don't solve any division by turning the equation into a fraction

also i just looked at the previous posts lol

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I got 32

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embarrassing topic for so many of you

How are any of you getting 16 lol? Its obviously 1

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TheAnthraxBunny posted...

Assuming that 8/2(2+2) is supposed to represent this:

https://i.imgur.com/fcslGM0.png

No, they're not the same expression.

If you were to replace the "" sign in 82(2 + 2) with a fraction, the expression would look like this:

https://i.imgur.com/wICduCg.png

8/2(2+2) rewritten horizontally would be (8)(2(2 + 2)). When solving fractions, the numerator and denominator are both treated as if there's a set of parenthesis around each of them.

Edit: In other words, you can't always just rotate an expression 90 degrees around the division symbol and call it a day.

the division symbol is used to notate fractions.... why the fuck do u think its a line with 2 dots on both sides? lmao

and assuming 2(2+2) is one term vs two separate terms is the "issue" here. anyone who's taken math has probably learned that you treat it as such in this format unless stated otherwise like your second picture.

le-seul-dieu posted...

the division symbol is used to notate fractions.... why the fuck do u think its a line with 2 dots on both sides? lmao

and assuming 2(2+2) is one term vs two separate terms is the "issue" here. anyone who's taken math has probably learned that you treat it as such in this format unless stated otherwise like your second picture.

Well if this is the case then there's multiple ways to interpret this expression. Which isn't a first for math.

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This is like math semantics and has virtually no real world application. When establishing a formula for practical application, this sort of confusion would never occur. Therefore the answer is irrelevant, and its only purpose is to create animosity.

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Vindris_SNH posted...

This is like math semantics and has virtually no real world application. When establishing a formula for practical application, this sort of confusion would never occur. Therefore the answer is irrelevant, and its only purpose is to create animosity.

Pretty much. I like to look at it as both answers being correct and incorrect at the same time. Just a flaw in the rules. Not even math is perfect.

CountDog posted...

Well if this is the case then there's multiple ways to interpret this expression. Which isn't a first for math.

No. There aren't. There's exactly one way to interpret this expression. If there were multiple ways to interpret math expressions a lot of people would quite literally die to engineering accidents.

If I never need a guaranteed 100+ post topic Ill know what to post.

The answer is clearly 16


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MaverickXeo posted...

Multiplication/Division in order left to right

This is the EXACT point people keep missing.

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Rimmer_Dall posted...

The irony here is that you're the one who can't do math. 8/2(4) is the same as (8/2)(4) and 4/1(4) is the same as (4/1)(4). You seem to think it magically turns into 8/(2*4) and 4/(1*4). Some of us do this shit for a living. Get a clue.

Math is not meant to be performed using a Google search. If youre framing a math question in format only meant to be read in exactly one situation and then reposting in a place that normal humans are reading, you have made the mistake.

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divot1338 posted...

Math is not meant to be performed using a Google search.

I didn't. Did you? I have not made a mistake. You simply don't understand order of operations as well as you think you do. Multiplication and division, having the same priority, are done from left to right, end of story.

le-seul-dieu posted...

the division symbol is used to notate fractions.... why the fuck do u think its a line with 2 dots on both sides? lmao

Yes I know this, otherwise I wouldn't have written 8/2 as "8 over 2" lol. That still doesn't mean you get to treat the entire expression as one big fraction.

le-seul-dieu posted...

and assuming 2(2+2) is one term vs two separate terms is the "issue" here. anyone who's taken math has probably learned that you treat it as such in this format unless stated otherwise like your second picture.

That's just simply not how it works. Otherwise, you should probably get a hold of Sal Khan and let him know he's been doing it wrong his whole life (check the third to last problem in the video):

https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-order-of-operations/v/introduction-to-order-of-operations

CountDog posted...

Well if this is the case then there's multiple ways to interpret this expression. Which isn't a first for math.

There isn't multiple ways to interpret this expression. When you plug the expression in the title into any algebra calculator, you get 16. When you write it le-seul-dieu's way, you get 1. You don't need to "rewrite" anything for these calculators because they know how division works.

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How does this have 150 posts. Its simple PEMDAS lmao

8/2*4
4*4
16

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Rimmer_Dall posted...

I didn't. Did you? I have not made a mistake. You simply don't understand order of operations as well as you think you do. Multiplication and division, having the same priority, are done from left to right, end of story.

I am completely aware of how they work and Ive also seen this dumbass topic or one just like it about a hundred times on CE.

Since I doubt anyone past the third grade has written the sign for division (my phone doesnt even have the symbol for it) then yes this question is posted purely for trolling the masses of morons who have to use google to do math.

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y'all are wrong. this is a matter of interpretation and the only correct way to interpret this is as a fraction i.e. 8/(2(2+2)).

since y'all apparently never done any algebra, let me walk you through it.
divide all the equation into separate parts
8=a
2=b
2+2=c

a/bc is 1 (how its suppose to be done)

(a/b) * c= 16 (what you're doing)

if y'all really are math majors you need to get a refund on your degree cuz y'all aint learn shit. I can see if you're arguing for a/b * c IF IT WAS ACTUALLY SHOWN THAT WAY AS A FRACTION. but it wasn't, and i'm checking your math.

le-seul-dieu posted...

y'all are wrong. this is a matter of interpretation and the only correct way to interpret this is as a fraction i.e. 8/(2(2+2)).

since y'all apparently never done any algebra, let me walk you through it.
divide all the equation into separate parts
8=a
2=b
2+2=c

a/bc is 1 (how its suppose to be done)

a/b * c= 16 (what you're doing)

if y'all really are math majors you need to get a refund on your degree cuz y'all aint learn shit. I can see if you're arguing for a/b * c IF IT WAS ACTUALLY SHOWN THAT WAY AS A FRACTION. but it wasn't, and i'm checking your math.

Communist math in a nutshell. No wonder everyone starts starving to death whenever you people get any power.

big mad

le-seul-dieu posted...

y'all are wrong. this is a matter of interpretation and the only correct way to interpret this is as a fraction i.e. 8/(2(2+2)).

You changed the problem by adding another set of parenthesis.

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Corrik7 posted...

You changed the problem by adding another set of parenthesis.

i didn't change anything. parenthesis were implied but apparently none of you knew that, case in point.