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Old 04-15-2011, 11:27 PM   #81
Canaan Sadow
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Quote:
Originally Posted by Totenkopf View Post
See end of post #37.
But that makes no difference... the order of operations is...

P
E
M
D
A
S

or

P
E
M or D
A or S
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Old 04-16-2011, 12:27 AM   #82
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^apparently the rules are interpretted differently. That was the whole point. Problem with the problem was ambiguous notation.....or noone would be "arguing" about it at all.


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Old 04-16-2011, 12:31 AM   #83
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All through school teachers have stated to us (the people I went to school with) that the order of operations is always

P
E
M or D
A or S

And everyone I've spoken to, they're teachers have said the same thing.
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Old 04-16-2011, 12:32 AM   #84
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Get outside of your bubble, boy....


Now, I want you to remember that no bastard ever won a war by dying for his country. He won it by making the other poor, dumb bastard die for his country.---Patton

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Old 04-16-2011, 12:34 AM   #85
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Quote:
Originally Posted by Totenkopf View Post
^apparently the rules are interpretted differently. That was the whole point. Problem with the problem was ambiguous notation.....or noone would be "arguing" about it at all.
People may interpret it two ways, but only one way is mathematically correct. That way being, Multiplication and Division (and Addition/Subtraction) have equal precedence and occur from left to right.

You could turn the division into a multiplication and multiply from left to right.

48*(1/2)*(9+3)

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Old 04-16-2011, 12:37 AM   #86
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Coulda, shoulda, didn't, though. Thus the ensuing "debate".


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Old 04-16-2011, 01:32 AM   #87
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Old 04-16-2011, 01:46 AM   #88
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Generally speaking, you're supposed to distribute the parentheses first and then do all the other operations. So..

48/2(9+3)


Distribute the 2

48/(18+6)

Add the parentheses and divide.

48/24 = 2




I know, I'm like every other person who solved this problem.

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Old 04-16-2011, 02:04 AM   #89
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Quote:
Originally Posted by VarsityPuppet View Post
Generally speaking, you're supposed to distribute the parentheses first and then do all the other operations. So..

48/2(9+3)


Distribute the 2

48/(18+6)

Add the parentheses and divide.

48/24 = 2




I know, I'm like every other person who solved this problem.

And tell me exactly how you came up with a made up math rule? JK. But I've never heard that... the only time I've ever heard of distribution is when there's a + or - sign in front of the number and parentheses due to the fact that it is multiplication and multiplication comes before adding or subtracting, but in the event that there's a division sign, you do the Parentheses, Exponents (if any) then multiply or divide (if the division comes first, you divide, but if multiplication comes first then you multiply first).
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Old 04-16-2011, 02:17 AM   #90
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Idk, that's what we did in pre-calc. For doing vertical or horizontal shifting to the standard y = mx+b formula, it's something like this:

y = m(x+5)+b

which then equals

y=mx+5m+b (if my math is right)

Then again, this equation isn't really written nicely..... the problem seems to be coming from whether the equation is

48
--------
2(9+3)

or

48
--- (9+3)
2

I'm inclined to think it was the former, because if they wanted to indicate that you should divide 48/2 first and then multiply that by (9+3) they would have separated the terms with parentheses. Just saying.

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Old 04-16-2011, 02:23 AM   #91
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Originally Posted by VarsityPuppet View Post
I'm inclined to think it was the former, because if they wanted to indicate that you should divide 48/2 first and then multiply that by (9+3) they would have separated the terms with parentheses. Just saying.

But if they wanted you to do that, then I would think that they would have divided the equation better. They would have done 48/(2(9+3)). Rather than... 48/2(9+3)...
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Old 04-16-2011, 04:32 PM   #92
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Old 04-25-2011, 10:16 AM   #93
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Do parenthesis first = 12

Now, here's the tricky bit, in maths, not having a sign between a number and a parenthesis indicates that you should assume there's a multiplication sign there. No ifs. No buts. Therefore, you do the division first, 48/2=24, then you multiply 24 by 12=288

I hate this equation, the problem with it is that when written online, it's difficult to differentiate whether it's putting 48 over everything, or 48 over 2 times the parenthesis. The correct answer is the latter


Yes
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Old 04-25-2011, 11:10 AM   #94
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2 or 288 is correct simply because the notation is impossible to understand. I'd tend to agree with the "288" people, but I think both sides have a valid argument.



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Old 04-25-2011, 11:57 AM   #95
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Quote:
Originally Posted by urluckyday View Post
2 or 288 is correct simply because the notation is impossible to understand. I'd tend to agree with the "288" people, but I think both sides have a valid argument.
The notation may be confusing in this form, but it's surely possible to understand. And only one answer is correct, 288

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Old 04-25-2011, 02:02 PM   #96
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48/2(9+3)=288
48/(2(9+3))=2

I don't see why this has to be so difficult.

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Old 04-25-2011, 02:06 PM   #97
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Old 04-25-2011, 02:14 PM   #98
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Originally Posted by deathdisco View Post
48/2(9+3)=288
48/(2(9+3))=2

I don't see why this has to be so difficult.
Yes.
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Old 04-25-2011, 02:44 PM   #99
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Quote:
Originally Posted by acdcfanbill View Post
The notation may be confusing in this form, but it's surely possible to understand. And only one answer is correct, 288
lol if there was only 1 correct answer, then there wouldn't be this big debate.



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Old 04-25-2011, 03:24 PM   #100
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Old 04-25-2011, 03:28 PM   #101
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Old 04-28-2011, 04:05 AM   #102
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Quote:
Originally Posted by Titanius Anglesmith View Post
288. The 2 isn't part of the parentheses, so there's no reason to multiply it first.
This is correct.
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Old 07-27-2013, 05:23 PM   #103
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Quote:
Originally Posted by Drunkside View Post
48÷2(9+3) = 288
48÷(2(9+3)) = 2
Case #1: The (9+3) is myltiplied by the numerator

48(9+3)
________
2

It becomes:

48*12
_______
2

Then:

576
___
2

And this gives us "288"

Case #2: The (9+3) is myltiplied by the denominator

48
_____
2(9+3)

This becomes:

48
______
2*12

Then:

48
___
24

And this gives us "2".

The original problem's form was the problem to everybody here, as it's not clear whether the (9+2) part is multiplied by the numerator or the denominator.

Quote:
Originally Posted by JediMaster08 View Post
This is correct.
Agreed, but you have to admit, it was kinda messy in its original form.

Quote:
Originally Posted by urluckyday View Post
lol if there was only 1 correct answer, then there wouldn't be this big debate.
My friend, if that was true, washing machines wouldn't work, planes would fall off the sky and buildings would collapse rapidly... When you find 2 answers in a math problem, it's probably that you have really messed up somewhere.

Quote:
Originally Posted by Canaan Sadow View Post
Yes.
That makes us 3, man. MATHEMATICS RULE!

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And so it begins...


MUHAHAHAHA!
And so it ends, Q...

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Last edited by maltron66; 07-27-2013 at 05:58 PM.
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Old 07-27-2013, 06:06 PM   #104
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This is simple.

You just rewrite it as:

48÷2*(9+3)
= 48÷2*12
= 24*12
= 288

There's no rule in mathematics that dictates distribution of a coefficient of numbers in grouping symbols takes any precedence over "normal" multiplication. The reason there's no "x", "*" or "⋅" is because it is simpler to omit them. Everyone analyzing the problem should know what "a(b)" means, it is a formal notation. Of course, in problems like these, it would in fact be simpler to include either, to prevent confusion as to whether it is a fraction with 48 in the numerator and 24 in the denominator, or 24(12), the latter being correct.

/thread
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