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

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MyWifeBeatsMe
03/20/20 9:19:15 PM
#1:


Simple elementary school math here.
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Fenrimis
03/20/20 9:21:39 PM
#2:


The loneliest number

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Bananana
03/20/20 9:22:31 PM
#3:


16 the way its written, but I cant wait for idiots to come interpret it differently

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Trumpo
03/20/20 9:22:46 PM
#4:


p
e
m
d
a
s
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rideshort
03/20/20 9:24:03 PM
#5:


The answer is 16

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Spidey5
03/20/20 9:24:24 PM
#6:


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HagenEx
03/20/20 9:24:56 PM
#7:


First you do 2x2, so that's 4, then you divide 8/2 and get 4, then you multiply 4 by 4, and the answer is FUCK MATH.

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Kitt
03/20/20 9:25:07 PM
#8:


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Xatrion
03/20/20 9:25:20 PM
#9:


1. That ain't a plus sign people.

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MutantJohn
03/20/20 9:25:26 PM
#10:


Obv. 16
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Harpie
03/20/20 9:26:58 PM
#11:


Bananana posted...
16 the way its written, but I cant wait for idiots to come interpret it differently
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

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Harpie
03/20/20 9:27:47 PM
#12:


HagenEx posted...
First you do 2x2, so that's 4, then you divide 8/2 and get 4, then you multiply 4 by 4, and the answer is FUCK MATH.
Your order of operations is wrong

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thronedfire2
03/20/20 9:28:42 PM
#13:


16
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

no, you only do the stuff *in* the parens first. once a number is just (2) you remove the parentheses

actually I think I'm wrong. I don't do math anymore. lying teachers!

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Medussa
03/20/20 9:29:26 PM
#14:


the answer is "simplify your fractions"

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Kitt
03/20/20 9:29:40 PM
#15:


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

That's how I did it. Either way, math wasn't really my strong suit.
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Harpie
03/20/20 9:30:00 PM
#16:


thronedfire2 posted...
16

no, you only do the stuff *in* the parens first. once a number is just (2) you remove the parentheses
We would, but since its 8 / 2(4), the 2 MUST be multiplied by the 4. We have to simplify the parentheses first, and the 2 is attached to that

Im a math major I know what Im doing

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Apocalypso
03/20/20 9:31:37 PM
#17:


Harpie posted...
We would, but since its 8 / 2(4), the 2 MUST be multiplied by the 4 next

Im a math major I know what Im doing
So if it was written 82(2+2) = ??

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Kami_no_Kami
03/20/20 9:32:51 PM
#18:


thronedfire2 posted...
16

no, you only do the stuff *in* the parens first. once a number is just (2) you remove the parentheses

actually I think I'm wrong. I don't do math anymore. lying teachers!
Parentheses
Exponent
Multiplication
Division
Addition
Subtraction

You perform both multiplications before dividing it by 8.
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OffTempo
03/20/20 9:32:51 PM
#19:


Its 16 how the fuck are a bunch of 30 year olds arguing about this??

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OffTempo
03/20/20 9:33:29 PM
#20:


Kami_no_Kami posted...
Parentheses
Exponent
Multiply
Divide
Add
Subtract

You perform both multiplications before dividing it by 8.
The order of those don't matter. Multiplication and Division are on the same level.

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anth0ny
03/20/20 9:33:51 PM
#21:


OffTempo posted...
Its 16 how the fuck are a bunch of 30 year olds arguing about this??

could've sworn it was -
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Eevee-Trainer
03/20/20 9:34:01 PM
#22:


Medussa posted...
the answer is "simplify your fractions"
The real answer is don't be lazy and try to write everything as single-line equations, that helps no one and only introduces ambiguity.

Bonus points go to those who also answer by using LaTeX.

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Johnny_Nutcase
03/20/20 9:35:00 PM
#23:


Harpie posted...
We would, but since its 8 / 2(4), the 2 MUST be multiplied by the 4. We have to simplify the parentheses first, and the 2 is attached to that

Im a math major I know what Im doing

This is what I got. And I suck at math.

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Apocalypso
03/20/20 9:35:09 PM
#24:


Kami_no_Kami posted...
Parentheses
Exponent
Multiplication
Division
Addition
Subtraction

You perform both multiplications before dividing it by 8.
Multiplication and division you do equally from left to right. Same with Addition and subtraction.

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DezDroppedFreak
03/20/20 9:35:21 PM
#25:


The answer is 11

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Rikiaz
03/20/20 9:35:29 PM
#26:


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

Not how it works. 2(4) is the exact same as 2x4 and you do multiplication and division left to right so first it's 8/2=4 then 4x4=16. 16 is the correct answer.

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Mistere Man
03/20/20 9:35:52 PM
#27:


Kami_no_Kami posted...
Parentheses
Exponent
Multiplication
Division
Addition
Subtraction

You perform both multiplications before dividing it by 8.

I may be misunderstanding your post but just Incase

Even though Multiplication comes before Division in PEMDAS, the two are done in the same step, from left to right. Addition and Subtraction are also done in the same step.

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Harpie
03/20/20 9:35:53 PM
#28:


Apocalypso posted...
So if it was written 82(2+2) = ??
Still one, because 82(2+2) is the same equation as 82(2+2)

Think of it like the number two is stuck to the side of the parentheses, so it acts as one unit. The same goes if it were a division symbol

For the answer to be sixteen, you would have to stick the 82 in parentheses, like this

(82)(2+2) = 16
82(2+2) = 1
82(2+2) = 1

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Caelthus
03/20/20 9:36:33 PM
#29:


Harpie posted...
We would, but since its 8 / 2(4), the 2 MUST be multiplied by the 4. We have to simplify the parentheses first, and the 2 is attached to that

Im a math major I know what Im doing
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.

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dave_is_slick
03/20/20 9:37:30 PM
#30:


Rikiaz posted...
Not how it works. 2(4) is the exact same as 2x4
Bingo.

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Harpie
03/20/20 9:37:43 PM
#31:


Mistere Man posted...
I may be misunderstanding your post but just Incase

Even though Multiplication comes before Division in PEMDAS, the two are done in the same step, from left to right. Addition and Subtraction are also done in the same step.
Youre correct, division and multiplication are equal. But because the 2 multiplying against the parentheses, we have to finish that first

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no
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Rikiaz
03/20/20 9:38:57 PM
#32:


Harpie posted...
Youre correct, division and multiplication are equal. But because the 2 multiplying against the parentheses, we have to finish that first
No you don't. That is not part of the parentheses step.

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Caelthus
03/20/20 9:39:24 PM
#33:


Harpie posted...
2 multiplying against the parentheses, we have to finish that first
Incorrect - multiplication against a parenthesis is subject to left-to-right. Only Multiplication/division within the parenthesis takes priority.

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Mistere Man
03/20/20 9:40:20 PM
#34:


Harpie posted...
Youre correct, division and multiplication are equal. But because the 2 multiplying against the parentheses, we have to finish that first
I honestly cant remember all the quirks of it, but their post sounded like you do multiplication before division no matter what which is why I said I may be misunderstanding them.

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Johnny_Nutcase
03/20/20 9:40:31 PM
#35:


I'm 99% confident Harpie is right but i'm not the best math student and nothing raises my rage meter more than math problems so i'm out.

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Garioshi
03/20/20 9:41:26 PM
#36:


16

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anth0ny
03/20/20 9:42:02 PM
#37:


my physics major bae isn't responding @ me!!!!!
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WafflehouseJK
03/20/20 9:42:28 PM
#39:


Harpie posted...
Youre correct, division and multiplication are equal. But because the 2 multiplying against the parentheses, we have to finish that first
... that's... not how that works.

2(4) in this context just signifies that it's multiplication, it doesn't fall under the "Do parentheses first." rule.


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Caelthus
03/20/20 9:43:19 PM
#40:


WafflehouseJK posted...
... that's... not how that works.

2(4) in this context just signifies that it's multiplication, it doesn't fall under the "Do parentheses first." rule.
Exactly.

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Harpie
03/20/20 9:43:53 PM
#41:


Caelthus posted...
Incorrect - multiplication against a parenthesis is subject to left-to-right. Only Multiplication/division within the parenthesis takes priority.
Youre right actually, I was thinking of exponents lol

My bad

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anth0ny
03/20/20 9:44:06 PM
#42:


physics major bae say:

people are awful
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anth0ny
03/20/20 9:44:21 PM
#43:


official answer
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Harpie
03/20/20 9:44:56 PM
#45:


Bananana posted...
Harpie, please pick another major
To be fair Im in my first year LOL

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OffTempo
03/20/20 9:45:09 PM
#46:


Step by step okay here we go:

1.) 8 / 2 (2+2)

2.) 8 / 2 (4)

3.) 8/2 (4)

4.) 4 (4)

5.) 4 (4) = 16

The ambiguity of the problem comes from the 2 being close the parenthetical. It does not matter. When theres the issue of multiplication and division being right next to eachother proceed from left to right. Therefore 8 divided by 2 and then multiplication by the 4.

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Johnny_Nutcase
03/20/20 9:45:18 PM
#47:


I used to use this site to cheat on my Algebra class. Harpie is a math major and wrong. Sorry Harpie I still like you.

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

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MyWifeBeatsMe
03/20/20 9:46:03 PM
#48:


Wolfram Alpha agrees that the correct answer is 16.
https://www.wolframalpha.com/input/?i=8%C3%B72%282%2B2%29
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Harpie
03/20/20 9:46:36 PM
#49:


rip at the L I just took

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no
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Harpie
03/20/20 9:47:53 PM
#51:


I mixed up the rules and was thinking of exponents, which is why I said what I said

dave_is_slick posted...
She isn't.
Yep lol

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dave_is_slick
03/20/20 9:49:11 PM
#52:


Harpie posted...
I mixed up the rules and was thinking of exponents, which is why I said what I said

Yep lol
Dammit, I deleted that post since I didn't see that you acknowledged the L. Respect.

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matt314hew
03/20/20 9:49:15 PM
#53:


Harpie posted...
We would, but since its 8 / 2(4), the 2 MUST be multiplied by the 4. We have to simplify the parentheses first, and the 2 is attached to that

Im a math major I know what Im doing

Might want to rethink your major then.. as others have stated the answer is 16..

8/2(2+2) = 8/2*4 = 4*4 = 16. if the problem was written as 8/(2(2+2)) then it would be 1.

PEMDAS => Parentheses (2+2), then exponents(none), then Multiply/Division (left to right - 8/2*4), then Add/Subtract(left to right - none in this case).

References - I am a Math Major as well.

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