Poll: What is the answer to 48/2(9+3)?
- Thread starter Brawndo
- Start date
How is my answer wrong? Please tell me. Rather than trolling I actually showed where the problem was, and how it should be calculated instead. Actually, it's rather ironic that you accuse me of trolling, and then attack my country.jp201 said:
Whatever PEMDAS is, it's obvious that you are doing it wrong. Consulting an american friend, I was told that even with PEMDAS the answer is 2. I've explained why in my previous post (not the one quoted), please read that. And, if you have anything more to say, please let it be educated.
PEMDAS/BODMAS are both equally valid.
Parentheses/Brackets > Exponents/Order > Division/Multiplication = Multiplication/Division > Addition/Subtraction = Subtraction/Addition
You go from left to right, top to bottom and work it out.
I read it as:
48/2(9+3)
=48/2*12
=24*12
=288
Parentheses/Brackets > Exponents/Order > Division/Multiplication = Multiplication/Division > Addition/Subtraction = Subtraction/Addition
You go from left to right, top to bottom and work it out.
I read it as:
48/2(9+3)
=48/2*12
=24*12
=288
I was taught that division signs, '/', count as being a grouping symbol. Ergo, using that logic you would wind up with 48 over top of 2*(9+3), which would be better clarified as 48/(2*(9+3)).
It all depends on the order that you think it should be done in. Without clarification, it all depends on how YOUR math teacher taught you.
It all depends on the order that you think it should be done in. Without clarification, it all depends on how YOUR math teacher taught you.
Oh god, can't you all see what he's doing? This is the new .99... = 1 thread, and you're all getting sucked into it.
The truth is that the equation is written ambiguously, so that two answers are both reasonably correct, and everyone argues about it for pages and pages and gets nowhere. Just stop this thing before it goes on for a hundred pages.
The truth is that the equation is written ambiguously, so that two answers are both reasonably correct, and everyone argues about it for pages and pages and gets nowhere. Just stop this thing before it goes on for a hundred pages.
It's BEDMAS where I am, but I guess it's brackets/parenthesis.Brawndo said:
48/2(9+3)
So 9 + 3, for the B/P
48/2(12)
Now the next step is division.
24(12)
Now we multiply the brackets with the outside
288
Not sure where you went wrong.
While I agree with you, it technically comes down to whether your math teacher taught you properly or not. Math is not subjective in the least.MagusVulpes said:
48/2(9+3) = 48/2(12) = 24(12) = 288Jarl said:
You do what is in the parentheses first always then any exponents then checking from left to right any multiplying and division not in parentheses and finally any addition and subtraction not in parentheses to come up with your answer.
The issue i had was that you said any other result is wrong and your correct which in your case your own result is wrong. If someone else wants to prove that I am wrong then I will gladly see but seeing people say I'm absolutely correct just to be wrong is your problem.
We only use parentheses first if all numbers are within the parentheses.
So for 48/2(12) we do order or operation of the 48/2 to 24 then multiply by 12 because the 2 in not within parentheses which would result in the answer 2 if done the other way 48/24 = 2 which is not the proper order.
48/2(9+3)
Okay, I got 288
Those who got 2, I imagine are looking at the problem like this:
48
-------
2*(9+3)
But that's incorrect. If that were the case, the problem would be written like so: 48/(2(9+3)), showing that 48 is being divided by the rest of the problem.
Instead, it is only being divided by 2, which is then multiplying 9 + 3.
So:
48/2*(9+3)
48/2*(12)
24*(12)
288
Okay, I got 288
Those who got 2, I imagine are looking at the problem like this:
48
-------
2*(9+3)
But that's incorrect. If that were the case, the problem would be written like so: 48/(2(9+3)), showing that 48 is being divided by the rest of the problem.
Instead, it is only being divided by 2, which is then multiplying 9 + 3.
So:
48/2*(9+3)
48/2*(12)
24*(12)
288
Mah brain it hurts... The Nerdiness in this thread is too strooong(not that that's a bad thing)...or I'm just an idiot who doesn't understand math, either way.
The problem here is that in a linear form like that, it's hard to tell if after the obviousBrawndo said:
48/2*(12)
The phrasing is
48
-- X 12
2
or
48
--
2 X 12.
The top will give you 24X12 = 288, the bottom, obviously, will give you 48/24 = 2.
I learned PEMDAS, so I see the bottom, but really if this was properly written as a fraction I doubt it would be up for debate.
That's because often times, the / is used as division, not as the line separating numerator from denominator.Merkavar said:
So, the answer is 288.
Actually, the parenthesis is a clear sign. If there are no other symbols (or a parenthesized portion isn't noticeably used as an exponent), the parenthesis stands for multiplication. Trust me. As someone who has a college degree in math and is working on their PhD. Let's take your 4X = 4*X example, and slightly modify it to 1/4x. Now, as we look at this, it is the same as 1/4 * x, however you are trying to claim it equal to 1/(4x). Because there is not anything to specialize that the x is in the denominator, the default methodology used by mathematicians the world over is that it is multiplied. When you "omit" a multiplication sign, it doesn't make them a single entry. 1/4x = 1/4 * x 1/(4x)Jarl said:
Another way to go about this, is simply substitution. Say that (9+3) = x. Now we have 48/2x = 24x, because nowhere does it say that x is being used to divide, because the mathematical equation is written purely left to write and therefore defaults to multiplication. If this was handwritten as 48/(2x) and someone translated it to 48/2x not realizing what they were doing, then it is an error on their behalf.