Diablo® III

48÷2(9+3) = ? cont.

Posts: 204


I underlined the part where you went wrong: 48/2(12) = 48/24
That is incorrect, because equation 48/2(12) is the same as 48/2*12 which means you:
1) divide
2) multiply
48/2=24
24*12 =288


the parenthesis must be eliminated before the division my friend.

I thought everyone learned this in the 6-7th grade?


The parenthesis in this case are only being used to denote multiplacation NOT being used as grouping symbols. The ONLY time you do parenthesis first is if there are OPERATIONS inside of them.

If you'd like this can be rewritten as
48/2*(9+3) = 48/2*12 = 24*12 = 288 = 24(12) = 48/2(12) = 48/2(9+3)

ALSO

48/2(9+3) = 288

48/[2(9+3)] = 2

There is a HUGE difference between these two equations. They are not equal and thus give two different answers. It's not that hard.
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sinew

all that random education book you linked proved, was that the answer is 288

it is showing you that when you divide fractions, fractions are treated as having brackets. Because fractions are actually numbers in that situation. 1/4 = 0.25 etc

you are extending this to apply to everything which is just wrong.

48÷2(9+3) = 288

(48÷2)(9+3) = 288

Your famous 5/3 ÷ 1/4

(5÷3)/(1÷4) = 6.66666

1.66666 ÷( 2(1/8)) = 6.66666

1.6666 ÷ 2(1/8) IS COMPLETELY DIFFERENT

just stop trollin makin me head hurt
Edited by Maazer#1103 on 6/12/2012 8:02 AM PDT
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the parenthesis must be eliminated before the division my friend.

I thought everyone learned this in the 6-7th grade?


The parenthesis in this case are only being used to denote multiplacation NOT being used as grouping symbols. The ONLY time you do parenthesis first is if there are OPERATIONS inside of them.

If you'd like this can be rewritten as
48/2*(9+3) = 48/2*12 = 24*12 = 288 = 24(12) = 48/2(12) = 48/2(9+3)

ALSO

48/2(9+3) = 288

48/[2(9+3)] = 2

There is a HUGE difference between these two equations. They are not equal and thus give two different answers. It's not that hard.


i said this earlier in page 2 and is correct 48/[2(9+3)] =2 which is not the question.
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guys, why are you arguing over kiddy math?

- do (9+3)
- multiply 2 by 12 to eliminate the ()
- go from left to right 48/24...
=2

Why is this complicated to understand? you shouldn't think about it any other way.

Don't they teach you the basics in the USA? This is just embarrassing.
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y = 48/x(9 + 3)
y = 48/x(12)
y * (x(12)) = 48
12xy = 48
xy = 48/12
xy = 4
y = 4/x

When x = 2
y = 4/(2)
y = 2

Therefore 2.

You can't just throw in parenthesis where ever you want.

Parenthesis are for illustrating where the terms moved from only.

y = 48/x(9 + 3)
y = 48/x*12
y * x * 12 = 48
12xy = 48
xy = 48/12
xy = 4
y = 4/x

When x = 2
y = 4/2
y = 2

Happy?


I want to cry T_T

y = 48/x(9 + 3)
y=48/x(12)
x* y= x * 48/x * 12 <-- time x both side (notice x/x on the right side = 1)
x*y=48*12 * 1
x*y= 576
(x * y )/ x = 576/ x <-- dive x both side again ( agian x/x = to 1 on the left side)
1* y= 576 / x

Given x = 2

y= 576/2
y=288

Everyone happy now =)


everyone is happy if you leave this earth.

sell your computer on ebay and give up on life.

we can all read the question

48
____ = 2
2(9+3)

THIS IS HOW IT IS WRITTEN. YOU CANNOT DIVIDE 24 BY 2 AND THEN MULTIPLY IT BY (9+3)

LEARN HOW TO MATHS PLZ.
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I want to cry T_T

y = 48/x(9 + 3)
y=48/x(12)
x* y= x * 48/x * 12 <-- time x both side (notice x/x on the right side = 1)
x*y=48*12 * 1
x*y= 576
(x * y )/ x = 576/ x <-- dive x both side again ( agian x/x = to 1 on the left side)
1* y= 576 / x

Given x = 2

y= 576/2
y=288

Everyone happy now =)


everyone is happy if you leave this earth.

sell your computer on ebay and give up on life.

we can all read the question

48
____ = 2
2(9+3)

THIS IS HOW IT IS WRITTEN. YOU CANNOT DIVIDE 24 BY 2 AND THEN MULTIPLY IT BY (9+3)

LEARN HOW TO MATHS PLZ.


why are you reading the question as 48 / (2*12) again? and not 48 / 2 * 12?
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Posts: 204
guys, why are you arguing over kiddy math?

- do (9+3)
- multiply 2 by 12 to eliminate the ()
- go from left to right 48/24...
=2

Why is this complicated to understand? you shouldn't think about it any other way.

Don't they teach you the basics in the USA? This is just embarrassing.


Because you just did "kiddy math" 100% wrong. You DO NOT multiply 2 and 12.

48/2 = 24
24(9+3) = 24(12) = 288

This is the correct answer and correct way that order of operations says to do it. There is no other answer than 288. Now, please go brush up on the basics of this "kiddy math".
Reply Quote
guys, why are you arguing over kiddy math?

- do (9+3)
- multiply 2 by 12 to eliminate the ()
- go from left to right 48/24...
=2

Why is this complicated to understand? you shouldn't think about it any other way.

Don't they teach you the basics in the USA? This is just embarrassing.


Again: Now, can you re-write 2(12) without getting an answer?
Reply Quote
guys, why are you arguing over kiddy math?

- do (9+3)
- multiply 2 by 12 to eliminate the ()
- go from left to right 48/24...
=2

Why is this complicated to understand? you shouldn't think about it any other way.

Don't they teach you the basics in the USA? This is just embarrassing.


Because you just did "kiddy math" 100% wrong. You DO NOT multiply 2 and 12.

48/2 = 24
24(9+3) = 24(12) = 288

This is the correct answer and correct way that order of operations says to do it. There is no other answer than 288. Now, please go brush up on the basics of this "kiddy math".


yes, my calculator is wrong as well. /sarcasm

it's not my fault you never learned how to eliminate parentheses.
Reply Quote
guys, why are you arguing over kiddy math?

- do (9+3)
- multiply 2 by 12 to eliminate the ()
- go from left to right 48/24...
=2

Why is this complicated to understand? you shouldn't think about it any other way.

Don't they teach you the basics in the USA? This is just embarrassing.


the () was answered when you found the answer for 9+3 the () didn't get larger just because you answered the question.

the question is 48 / 2 (12) which = 48 / 2 * 12.
your reading it as 48 / 2 (12) as 48 / (2*12).
which doesn't make sense.

when did left to right means solve everything in the () and next to it before starting from left to right. the * is implied you do need to solve the WHOLE of the right then solve from the left because the whole of the right isn't in it's own ()
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Posts: 204


I want to cry T_T

y = 48/x(9 + 3)
y=48/x(12)
x* y= x * 48/x * 12 <-- time x both side (notice x/x on the right side = 1)
x*y=48*12 * 1
x*y= 576
(x * y )/ x = 576/ x <-- dive x both side again ( agian x/x = to 1 on the left side)
1* y= 576 / x

Given x = 2

y= 576/2
y=288

Everyone happy now =)


everyone is happy if you leave this earth.

sell your computer on ebay and give up on life.

we can all read the question

48
____ = 2
2(9+3)

THIS IS HOW IT IS WRITTEN. YOU CANNOT DIVIDE 24 BY 2 AND THEN MULTIPLY IT BY (9+3)

LEARN HOW TO MATHS PLZ.


Why are you assuming (9+3) is in the denominator because, its not. If (9+3) was meant to be in the denominator there would be added grouping symbols. i.e. 48/[2(9+3)] THIS is 2. There is no other way to do it.
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SuddenLoss, I am trying to break it down by asking you questions, but you seemed to ignore them...
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The big question. Is 2(12) still considered parentheses or just multiplication? If it was just mulitplication it should have been written as such, 2*(12). If it is considered still parentheses, you must complete that first before any division/multiplication. Without the * in there, this would appear to be one single function and would need to be solved first.
Edited by CobraTodd#1319 on 6/12/2012 8:13 AM PDT
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Posts: 204


Because you just did "kiddy math" 100% wrong. You DO NOT multiply 2 and 12.

48/2 = 24
24(9+3) = 24(12) = 288

This is the correct answer and correct way that order of operations says to do it. There is no other answer than 288. Now, please go brush up on the basics of this "kiddy math".


yes, my calculator is wrong as well. /sarcasm

it's not my fault you never learned how to eliminate parentheses.


Sigh, type 48/2(9+3) into google and you will see why you are wrong. It's funny because my TI-89 says 288. Because you know, it's the right answer.

And I've already covered your eliminate the parentheses nonsense in my earlier post. Please keep doing it wrong. It's pretty amusing.
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06/12/2012 08:11 AMPosted by CobraTodd
The big question. Is 2(12) still considered parentheses or just multiplication? If it was just mulitplication it should have been written as such, 2*(12). If it is considered still parentheses, you must complete that first before any division/multiplication. Without the * in there, this would appear to be one single function (similar to 2x) and would need to be solved first.


2(12) means 2 * 12
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Posts: 204
The big question. Is 2(12) still considered parentheses or just multiplication? If it was just mulitplication it should have been written as such, 2*(12). If it is considered still parentheses, you must complete that first before any division/multiplication. Without the * in there, this would appear to be one single function (similar to 2x) and would need to be solved first.


No that is not how it works. 2(12) = 2*12

IF IT WAS [2(9+3)] then YES you do that first, but it isn't not and thus you do the division first. As I said before, the ONLY time you do grouping symbols is if there is an OPERATION INSIDE the symbols. 2(12) is just mulitplication and thus is not done first.
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06/12/2012 08:14 AMPosted by random
The big question. Is 2(12) still considered parentheses or just multiplication? If it was just mulitplication it should have been written as such, 2*(12). If it is considered still parentheses, you must complete that first before any division/multiplication. Without the * in there, this would appear to be one single function (similar to 2x) and would need to be solved first.


No that is not how it works. 2(12) = 2*12

IF IT WAS [2(9+3)] then YES you do that first, but it isn't not and thus you do the division first. As I said before, the ONLY time you do grouping symbols is if there is an OPERATION INSIDE the symbols. 2(12) is just mulitplication and thus is not done first.


this

also, ancient aliens
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When will people realize this is a POORLY WORDED question.

It is the responsibility of the person posing the question to have it phrased in such a way that it makes sense. Mathematicians do not use "÷" symbol to denote division with these types of questions. Instead they use properly placed parenthesis or denote it like this:

Numerator
Denominator

/thread
Edited by PhoenixFire#6336 on 6/12/2012 8:16 AM PDT
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The big question. Is 2(12) still considered parentheses or just multiplication? If it was just mulitplication it should have been written as such, 2*(12). If it is considered still parentheses, you must complete that first before any division/multiplication. Without the * in there, this would appear to be one single function (similar to 2x) and would need to be solved first.


2(12) means 2 * 12


2(12) is just like writing 2(x), which means 2 * x, where in our case x is 12
Edited by Grimraven#1853 on 6/12/2012 8:16 AM PDT
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Yes it does, but in what order of operation. Is it still considered parentheses 2(12) to be done before division?
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