View Poll Results: 48÷2(9+3)=?

288


41 
45.56% 
2


49 
54.44% 
48÷2(9+3)=???


040811, 09:02 AM

#31

Lexus Fanatic
Join Date: Jan 2006
Location: Houston, Texas
Posts: 20,966

no its 2, type it into any graphing calculator and its 2. The only way to get 288 is if you perform the division and multiplication BEFORE parenthesis. You are not allowed to do that. Parenthesis are always first



040811, 09:11 AM

#32

Lexus Champion
Join Date: Jan 2006
Location: UK
Posts: 2,258

Quote:
Originally Posted by 4TehNguyen
no its 2, type it into any graphing calculator and its 2. The only way to get 288 is if you perform the division and multiplication BEFORE parenthesis. You are not allowed to do that. Parenthesis are always first

That's what I was taught as well so I made it 2 (but then it was a long time ago...).
EDIT: I've changed my mind. Writing it down properly as 48/2*(9+3) I can see it's 288. You still do the parethesis first but then it's 48/2 multiplied by 12.
Last edited by Big Andy; 040811 at 10:14 AM.



040811, 09:23 AM

#33

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Join Date: Jul 2009
Location: CA
Posts: 5,349

So, let me get this straight....we're doing algebra, on a Friday. Hell no, my schooling days on any Friday ended in HS. lol But I answered 288. I was taught PEMDAS, with multiplication/division and addition/subtraction being of equal weight in any mathematical equation. Left to right was how we were taught to deal with these sort of things. Very cool brain teaser, if you will, to start the day.



040811, 09:41 AM

#34

Lexus Champion
Join Date: Jan 2003
Location: Texas
Posts: 3,349

I got 288 and M$ Excel calculated 288 as well. Go back to school you dingbats.



040811, 09:50 AM

#35

Lead Lap
Join Date: Sep 2010
Location: Ohio
Posts: 470

We can all agree that the parentheses are solved first, which leaves:
48÷2(12) which equals 48÷2x12
Those claiming "left to right" are correct in that the answer is 288.
In reality, and not thirdgrade order of operations, the 2 has two equal potential actions and it should have a parentheses around the intended next function. Digitization has rendered the traditional "left to right" somewhat irrelevant, and orders need to be expressed explicitly.
I get the feeling the OP is an accountant at GM...
"is our profit 2 or 288? I'll ask on the forum...."
HAHA



040811, 09:51 AM

#36

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Join Date: Jul 2005
Location: CA
Posts: 15,736

7 because that's the answer to the universe.



040811, 09:53 AM

#37

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Join Date: Jul 2005
Location: CA
Posts: 15,736

Quote:
Originally Posted by 4TehNguyen
if you dont believe us just type the equation into any graphing calculator. They are designed to perform this PEMDAS method

My TI83+ says it's 288
My calculator is broken.



040811, 10:40 AM

#38

No Sir, I Don't Like It
Join Date: Dec 2005
Location: Jax, FL
Posts: 8,477

How I picture it:
48/ 2(9+3)
which becomes...
48/ 2(12)
24(12)
288
The way I'm seeing it is that the 9+3 is NOT underneath the division part of the equation. If it were, then the equation wouldn't be 48/2(9+3) but would instead be 48/(2(9+3)). I think this is where many people are getting confused in their operations. Then again I hate math with a passion, took me till middleschool to figure out %'s......



040811, 10:43 AM

#39

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Join Date: Jan 2006
Location: Houston, Texas
Posts: 20,966

Quote:
Originally Posted by GSteg
My TI83+ says it's 288
My calculator is broken.

typed it in my casio and it gave me 2
now im seeing how its 288. Head hurts now



040811, 10:54 AM

#40

Lexus Fanatic
Join Date: Jan 2003
Location: so cal
Posts: 11,383

Quote:
Originally Posted by muhbuhtuh
my answer is 2 as well. but i can see how the answer can be 288. but is 288 really the answer?

Quote:
Originally Posted by 4TehNguyen
no its 2, type it into any graphing calculator and its 2. The only way to get 288 is if you perform the division and multiplication BEFORE parenthesis. You are not allowed to do that. Parenthesis are always first

Quote:
Originally Posted by Big Andy
That's what I was taught as well so I made it 2 (but then it was a long time ago...).
EDIT: I've changed my mind. Writing it down properly as 48/2*(9+3) I can see it's 288. You still do the parethesis first but then it's 48/2 multiplied by 12.

I got 2 as well, remembering back in the old days
and I always "remembered" division as having the least priority
I'm going to be tutoring my kids later on and I better get this straight



040811, 11:02 AM

#41

Keeper of the light
Join Date: Feb 2003
Location: My little world
Posts: 33,617

Quote:
Originally Posted by KillaIS250
If you look at the "input" here its different. Now its a fraction "48/2" multiplied by (9+3).

In longer syntax I came up with 2 because the division sign appears to isolate 48, but in fraction syntax it is clearly 288. You feel like when it is in the longer syntax that you are doing it out of order, but you are really just doing it wrong period.



040811, 11:06 AM

#42

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

Quote:
Originally Posted by 4TehNguyen
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

When you get to 48/2*12, why are you doing the multiplication first? Multiplication and division have equal weight. Once you get to this stage, you go left to right, leaving you with 288.
Quote:
Originally Posted by 4TehNguyen
no its 2, type it into any graphing calculator and its 2. The only way to get 288 is if you perform the division and multiplication BEFORE parenthesis. You are not allowed to do that. Parenthesis are always first

TI89 Titanium says it's 288, u mad? The only way to get 2 is to put in parenthesis that aren't there already. You are not allowed to do that. 48/(2(9+3)) = 2, but 48/2(9+3)=288.
Quote:
Originally Posted by Jewcano
How I picture it:
48/ 2(9+3)
which becomes...
48/ 2(12)
24(12)
288
The way I'm seeing it is that the 9+3 is NOT underneath the division part of the equation. If it were, then the equation wouldn't be 48/2(9+3) but would instead be 48/(2(9+3)). I think this is where many people are getting confused in their operations. Then again I hate math with a passion, took me till middleschool to figure out %'s......

This
edit: OLT votes 288, win



040811, 11:10 AM

#43

Keeper of the light
Join Date: Feb 2003
Location: My little world
Posts: 33,617

What people are not visualizing that is screwing them up is this:
48 / 2 * (9+3) =



040811, 11:48 AM

#44

Pole Position
Join Date: Apr 2008
Location: CA
Posts: 322

I initially went with 2 because I multiplied after adding 9 and 3 first. But calculation should be from left to right so 288 should be the correct answer.



040811, 12:19 PM

#45

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

Seriously people. Just stop it xD



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