View Poll Results: 48÷2(9+3)=?

288


41 
45.56% 
2


49 
54.44% 
48÷2(9+3)=???


040711, 11:32 PM

#16

Lexus Champion
Join Date: Dec 2008
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I don't understand why "order of operation" questions turn into such heated controversies over the internet. The answer is unambiguously 288.
4^2 is unambiguously 16 for similar reasons. the "" implies "1" which is multiplied to "4^2." People often incorrectly read the statement as "negative four squared" when it should be read as "the negative of four squared."
Negative four squared = (4)^2 = 16
The negative of four squared = 4^2 = 16
.999~ where the "9" is repeating is exactly equal to 1. It's not approximately 1. It's not 1 "if you round up." It's exactly and unambiguously equal to 1.
Here's a far more interesting mathematical problem to ponder 
http://en.wikipedia.org/wiki/Bertran..._(probability)



040711, 11:36 PM

#17

I heart Honda
Join Date: Dec 2005
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Posts: 1,038

Quote:
Originally Posted by Davtown
Wolfram Alpha agrees

this is enough to convince me that i just got an "F"



040711, 11:37 PM

#18

Lexus Fanatic
Join Date: Dec 2006
Location: californication
Posts: 6,806

people getting it confused with 48+2(9+3)
that division sign is throwing people off, thinking it separates an equation like a plus sign.
glad i don't ever have to deal with this stupid syntax. I also got it wrong.
I got an 800 math SAT, but i'm no longer smarter than a 5th grader.



040711, 11:43 PM

#19

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Join Date: Dec 2008
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Posts: 1,727

There's no shame in getting in wrong. The statement is written awkwardly and therefore forces you to carefully follow the order of operations protocol to arrive at the correct answer. At first glance, most people solve problems like this through pattern recognition instead of meticulously going through the order of operations protocol. It's perfectly understandable for people to answer "2" at first glance.
I engaged in so many of these trivial "order of operations" debates as a kid that I forced myself to meticulously apply "P E M/D A/S" before I answered.



040711, 11:49 PM

#20

Lexus Champion
Thread Starter
Join Date: Apr 2003
Location: California
Posts: 3,429

Quote:
Originally Posted by syzygy
I don't understand why "order of operation" questions turn into such heated controversies over the internet. The answer is unambiguously 288.
4^2 is unambiguously 16 for similar reasons. the "" implies "1" which is multiplied to "4^2." People often incorrectly read the statement as "negative four squared" when it should be read as "the negative of four squared."
Negative four squared = (4)^2 = 16
The negative of four squared = 4^2 = 16
.999~ where the "9" is repeating is exactly equal to 1. It's not approximately 1. It's not 1 "if you round up." It's exactly and unambiguously equal to 1.
Here's a far more interesting mathematical problem to ponder 
http://en.wikipedia.org/wiki/Bertran..._(probability)

don't forget to vote in the poll



040811, 12:00 AM

#21

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Join Date: Jan 2011
Location: 909, CA
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If you look at the "input" here its different. Now its a fraction "48/2" multiplied by (9+3).



040811, 12:40 AM

#22

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Thread Starter
Join Date: Apr 2003
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Quote:
Originally Posted by KillaIS250
If you look at the "input" here its different. Now its a fraction "48/2" multiplied by (9+3).
[IMG]http://i.imgur.com/FDcxk.png[IMG]

Yeah, that's the same thing as 48÷2(9+3)
If it was 48÷[2(9+3)], then the answer would be 2, but it's not.



040811, 01:03 AM

#23

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Join Date: Jun 2004
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Posts: 6,320

Come on guys, I am horrible at math and got 288.



040811, 01:11 AM

#24

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Join Date: Dec 2006
Location: californication
Posts: 6,806

problem with this is that it's intentionally written like a brain teaser. People who once learned PEMDAS, and then mixed it up, are likely to get this wrong.
People who never gave a crap about math are likely to just read it from left to right.
did it ever hurt to write in some extra parentheses?
(48/2)(9+3).
There. keep it simple stupid. no thinking. no need to recall 6th grade math. no internet arguments. now, everyone should get the answer.
i'm glad that in practical everyday applications, we don't deal with 48/2(9+3).
Last edited by dunnojack; 040811 at 01:14 AM.



040811, 01:54 AM

#25

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Join Date: Mar 2011
Location: Japan to NoVA
Posts: 76

PEMDAS... glad I still remember something.



040811, 05:05 AM

#26

Lexus Champion
Join Date: Sep 2007
Location: New Jersey
Posts: 4,680

48÷2 (9+3)
2(9+3)=12
48/12=4
awwwwwwwww yaaaaaaaaaaaaaaaaaaaaa
No seriously, the answer is 2.
48÷2 (9+3)
9+3 = 12
12 * 2 = 24
48 / 24 = 2
Really you guys?



040811, 05:21 AM

#27

Super Moderator
Join Date: Apr 2004
Location: Miami, Florida
Posts: 16,457

I remember PEMDAS by the following:
Please
Excuse
My
Dear
Aunt
Sally



040811, 05:29 AM

#28

Lead Lap
Join Date: May 2007
Location: NY
Posts: 689

Quote:
Originally Posted by Lexmex
I remember PEMDAS by the following:
Please
Excuse
My
Dear
Aunt
Sally

That's what I was taught, I'm getting 2.



040811, 06:06 AM

#29

Lexus Fanatic
Join Date: Jan 2006
Location: Houston, Texas
Posts: 20,353

if you dont believe us just type the equation into any graphing calculator. They are designed to perform this PEMDAS method
The answer is 2



040811, 06:38 AM

#30

Lexus Champion
Join Date: Oct 2007
Location: FL
Posts: 3,907

my answer is 2 as well. but i can see how the answer can be 288. but is 288 really the answer?



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