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On April 08 2011 05:36 N3rV[Green] wrote:
......I'm speechless....dumbfounded, and concerned about the general population that much more.
it's 288. Division and multiplication are equal in priority so it is read left to right.
48/2*(12)
24*12=288
WTF are people thinking.
Its easy to mess up if you do PEMDAS, especially if youve been focusing on higher level stuff for a while. I love all the people in here who got it right, or wrong lol, and are like "OMG ALL OF YOUR MATH SKILLZ SUCKZ!". Ive taken probably about 10 calculus based math courses and having to remember all the algebra rules is by far the hardest part.
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Got 288 for the answer.
I read the second one as (1/2) * x though simply because that's how the way the computer or calculator would read it. I'm a computer science major so when it comes to syntax of something, I'm pretty strict since the computer won't interpret it any other way. I can completely see how most people would see it as 1/(2 * x) though since the 2x as a whole can be classified as the denominator. This reasoning is also the same for how I got the answer of 288 (every language I've worked with does operations in PEMAD left to right).
Usually when I take notes on the computer for classes outside of CS, I use an equation editor so that everything comes out in "pretty print" which eliminates any form of ambiguity.
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I can't believe how many people are unironically saying "you ACTUALLY got 2? ahahahaha".
It's kind of like saying "you ACTUALLY can't see the old men beside the vase???". It didn't mention that the security of the world was hanging in the balance, obviously some people would just click on the obvious (at first glance) answer.
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On April 08 2011 07:17 VarpuliS wrote:
8th grader here, is this really considered hard?
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction.
How about you read the thread and stop spouting the PEMDAS crap that nobody is argueing about...
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On April 08 2011 07:19 forthwith wrote:The way I looked at it was: 1) 48÷2(9+3) 2) 48÷2(12) = 48÷2*12 3) 24*12 4) 288 Between steps 1 and 2, after completing the 9+3 in the parentheses, they essentially drop, and aren't a part of the equation anymore, because they don't demand anything be done first anymore (by PEMDAS, or whatever). Thus, it's just a matter of going left to right from step 2, with division/multiplication being interchangeable in the acronym edit: Raelcun beat me to it at the top o the page 
However, by dropping the brackets, you are sort of bumping it down from P to M on your own accord.
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United States24772 Posts
On April 08 2011 07:20 Helios.Star wrote:Show nested quote +On April 08 2011 05:36 N3rV[Green] wrote:
......I'm speechless....dumbfounded, and concerned about the general population that much more.
it's 288. Division and multiplication are equal in priority so it is read left to right.
48/2*(12)
24*12=288
WTF are people thinking.
Its easy to mess up if you do PEMDAS, especially if youve been focusing on higher level stuff for a while. I love all the people in here who got it right, or wrong lol, and are like "OMG ALL OF YOUR MATH SKILLZ SUCKZ!". Ive taken probably about 10 calculus based math courses and having to remember all the algebra rules is by far the hardest part.
I really don't think for most people advanced in math the issue should be being able to remember the rules of order of operation... it's just a matter of what is more natural for them based on how the expression is written.
That's not to say people with degrees in math can't forget basic math but I don't think that's a predominant issue in this thread among the well educated in math.
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The problem is when people see division, they think fraction, so they see the equation as
48
---------
2(9+3)
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i quit this troll thread -.- 2(1+1)/2 is how much ? ^^
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On April 08 2011 07:18 Mailing wrote:
I always learned even up through Uni that
48÷2(12)
It would be WRONG to treat this as 24 x 12
That you should always distribute to 48 / 24 FIRST.
If you do 48÷2(12x), it is incorrect always to go 24(12x), and you must do 48/(24x)
Is this not always the proper approach?
What they're saying is that technically this is wrong because technically 48÷2(12) is no different from 48 ÷ 2 x 12.
But in our mathematics classes it has always been that we would interpret the notation as you have, and that this was just a given. So in conventional use it would be 2, but technically it is 288.
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The conflict people are having is
DOES 48÷2(12) MEAN
_48_ x (12)
2
OR
_48_
2(12)
Obviously it is the former, if you carry the 12 down, as shown in the latter expression, you are changing the question...
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On April 08 2011 07:21 RoyalCheese wrote:I made a couple of experiments in the Maple (math software we use) and there are some interesting results. Perheps there should have been a 24 option in the pool :D http://dl.dropbox.com/u/198399/tl_math_problem.png![[image loading]](http://dl.dropbox.com/u/198399/tl_math_problem.png)
Woah, what fucked up version of maple is that???
Ok, I just did some experiments, and I realized what is going on there. Maple should really be giving an error, but it is actually evaluating 48 / 2 to 24, and then treating 24 as a function. You see, 24 is the function that returns 24 on all arguments. Weird...
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On April 08 2011 07:23 GizmoPT wrote:
i quit this troll thread -.- 2(1+1)/2 is how much ? ^^
lol you failed with the troll because the 2 in the front and the 2 in the back cancel out each other.
Regardless of how you interpret it you'll always get the same question. Or did I just get meta-trolled.
I take my leave.
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On April 08 2011 07:18 Geovu wrote:Show nested quote +On April 08 2011 07:07 micronesia wrote:
I am not aware of any difference between / and the other division sign... they both mean the same thing to me. Can anyone point me to a reference that says otherwise? + Show Spoiler +Basically I use / symbol when scrawling on a single line of loose leaf, to lazily mean x / (y+z) instead of x/y+z, which is more proper. EDIT: Because of this, I got 2 initially. I was also confused because I could see the poll results before voting so I kept double checking and getting more confused lol PS GooN PosT WooT
Excactly what I did, written on a paper like in this paint, you clearly see how it's meant to be so there is no misunderstanding.
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United States24772 Posts
Inserted a new mod edit at the bottom to try to discourage uninformed people from saying "hi I'm new to this thread and LOL at people picking 2 wtf didn't they learn math"
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On April 08 2011 07:21 RoyalCheese wrote:
I made a couple of experiments in the Maple (math software we use) and there are some interesting results. Perheps there should have been a 24 option in the pool :D
Your math program just doesn't accept any part of the problem if theres no operator.
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Yes it's 288... It can fly by you quite easily ofcourse. Another similiar one is:
5*4/10*2 = ?
Ofcourse it's 4 but most people that look at it quickly will say 1.
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EPT![[image loading]](http://imgur.com/u6sTZ.jpg)
