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Old 05-24-2011, 06:57 PM
 
3,622 posts, read 5,578,784 times
Reputation: 4322

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Quote:
Originally Posted by Alacran View Post
They're programmed to work in a certain way.
Exactly...
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Old 05-24-2011, 07:08 PM
 
3,622 posts, read 5,578,784 times
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Quote:
Originally Posted by TurcoLoco View Post
The way I do it, though a bit unorthodox and perhaps confusing to some, instead of a question mark, I put an X which signifies an unknown value and try to balance both sides of the equal sign:

48 ÷ 2 (9+3) = X

which means ==> (9+3) = (X ÷ 48) x 2

which means ==> 12 = (X ÷ 48) x 2

and you get ==> 12 = X ÷ 24 or 12 ÷ 2 = X ÷ 48 (whichever you prefer)more simplified ==> 12 = X ÷ 24 [or] 6 = X ÷ 48
let's leave X alone ==> 12 x 24 = X [or] 6 x 48 = X

288 = X


Come to think, I used to suck at math!
48/2 (9+3) = x
2* 48/2 (9+3) =2x
48(9+3)= 2x

48(12) = 2x
576= 2x

288= x

Congrats...this is the first argument that makes complete sense.
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Old 05-24-2011, 07:31 PM
 
593 posts, read 1,312,029 times
Reputation: 192
Quote:
Originally Posted by nana053 View Post
I cannot believe that this thread is still going on. Some people should reread their basic algebra.

5+10*3 = ?

If you go from left to right, you get the wrong answer 45
If you use the order of operations you get the correct answer 35
left and right comes when you have multiplication and divisions..
For example,
5+10*3*5=
in this case you do 10*3 first, then 30*5, this is when the left to right rule must be used..


Quote:
This is a simpler problem than the one in the OP, but it shows the importance of the order of operations.
Yeah the order of operations that you dont know about..

Quote:
Here's another 15 + 45/3 - 6*5

If you go left to right, you get 60/3 - 30 or 20 - 30 = -10 which is wrong.
If you do the order of operations, you get 15 + 15 - 30 = 30 - 30 = 0 which is correct.
here you start by the division first,
15+15-6*5,
Then 15+15-30
then you add left to right
30-30, result 0

Quote:
If you group numerator and denominator, you get 60/(3-30) = 60/-27 = -2.22222222222.....

We NEED the order of operations so that equations are non-ambiguous.
sorry,, you must read again the order of operations and the rule of left to right.. because you don't know it...
check the links I have posted, it cant be more clearer.
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Old 05-24-2011, 07:34 PM
 
593 posts, read 1,312,029 times
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Quote:
Originally Posted by lyra33 View Post
48÷2(9+3) = ????


48÷2(12) = ????

48÷24 = 2
U are wrong, the division comes first...
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Old 05-24-2011, 07:38 PM
 
593 posts, read 1,312,029 times
Reputation: 192
Quote:
Originally Posted by lyra33 View Post
48/2 (9+3) = x
2* 48/2 (9+3) =2x
48(9+3)= 2x

48(12) = 2x
576= 2x

288= x

Congrats...this is the first argument that makes complete sense.
So finally you agree that is 288 and not 2?
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Old 05-24-2011, 09:40 PM
 
23,541 posts, read 69,994,387 times
Reputation: 48990
FOURTEEN friggin pages of this??? Over what is primarily a semantic issue? Are 2 and 288 running for election?

I haven't seen so much nonsense since the determination of velocity of an unladen swallow.
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Old 05-24-2011, 10:04 PM
 
17,183 posts, read 22,783,425 times
Reputation: 17472
Quote:
Originally Posted by infiri View Post
left and right comes when you have multiplication and divisions..
For example,
5+10*3*5=
in this case you do 10*3 first, then 30*5, this is when the left to right rule must be used..


Yeah the order of operations that you dont know about..


here you start by the division first,
15+15-6*5,
Then 15+15-30
then you add left to right
30-30, result 0


sorry,, you must read again the order of operations and the rule of left to right.. because you don't know it...
check the links I have posted, it cant be more clearer.
Excuse me?

Even when you have addition and multiplication the order of operations applies.

You do multiplications and divisions before additions and subtractions. I taught Algebra.

Good grief! Are you trying to tell me that 5 + 10*3 does not equal 35. It does.

Perhaps you misread what I was saying? You always do multiplication and division first from left to right.

I agree with YOUR problem too.

I was giving examples of ways to be wrong as well as the correct ways to solve the problems I showed.
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Old 05-24-2011, 10:11 PM
 
3,622 posts, read 5,578,784 times
Reputation: 4322
Quote:
Originally Posted by infiri View Post
So finally you agree that is 288 and not 2?
Yes, but only if the equation is worked that way, set = to x. Because there is no debate as to what to work first. Just do simple algebra.
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Old 05-24-2011, 10:15 PM
 
3,622 posts, read 5,578,784 times
Reputation: 4322
Quote:
Originally Posted by harry chickpea View Post
FOURTEEN friggin pages of this??? Over what is primarily a semantic issue? Are 2 and 288 running for election?

I haven't seen so much nonsense since the determination of velocity of an unladen swallow.
And yet you are here with all the rest of the peons to add yet one more post to "the friggin pages." Ironic!
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Old 05-24-2011, 10:16 PM
 
3,622 posts, read 5,578,784 times
Reputation: 4322
Quote:
Originally Posted by nana053 View Post

Good grief! Are you trying to tell me that 5 + 10*3 does not equal 35. It does.

Perhaps you misread what I was saying? You always do multiplication and division first from left to right.

I agree with YOUR problem too.

I was giving examples of ways to be wrong as well as the correct ways to solve the problems I showed.
Look closer the equation is 5 +10*3*5.
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