48÷2(9+3)

[My32Doors]

I have the answer beyond question!!!
Corzza/Polyal(RodP+flappist)= FIIK

[XDV800]

Maths is for nerds...

[FGII-XR6]

As I was taught at school and im my electrical trade my previous post applies

Assuming the correct equation is 48÷2X(9+3) it must be calculated this way

Brackets first: 48÷2*12
Multiplication next: 48÷24
Division next: 2
There is no other way to calculate the above equation correctly under the following mathematical principal
Any elements in brackets should always be calculated first, followed by multiplication, division, addition, and subtraction.

people get confused because of the difficulty in applying this in an electronic enviroment but this principal applies to all fundamental equations that are the cornerstones of todays modern technology. this left to right principal has never been a valid mathematical principal and using this in place of the correct principals can cause some times dangerous outcomes when it involves calculations for engineering

Originally Posted by Geez Louise

That is the same reply I received from my friend just now:

You do the brackets first so you end up with 48 divided by 2 times twelve, you work that out going left to right to get 288. The two outside the brackets means multiplied by, not divided by.


So as far as I am concerned, this answer has come from one of the greatest minds I know. I am content that the answer is 288.

For such a simple question....it is amazing how fired up some people have gotten.

Thanks to the OP for the entertainment

[ST]

Did everyone happen to miss my last post? BOTH answers are correct. END. THREAD.

Also au3xr6 solving an equation left to right IS very much a fundamental mathematical principal. You are completely wrong to think otherwise.

* In Mathematics, the order in which mathematical problems are solved is extremely important.

Rules

1. Calculations must be done from left to right.

http://math.about.com/library/weekly/aa040502a.htm

[Stefan]

^^^^ Stop posting everyone the authority has spoken.

Two different answers yet both are correct....

[ST]

Originally Posted by Stefan

^^^^ Stop posting everyone the authority has spoken.

Two different answers yet both are correct....

Thank you for once again confirming your fraudulence as a maths lecturer.

You may have missed RodP's multitude of posts (and my post linking to a full explanation) explaining that due to the ambiguity of the equation it can be solved with different methods resulting in BOTH answers, neither of which are incorrect.

[Stefan]

First my calculation is flawed with amateurish mistakes, now it is amongst two correct answers, one day you might work out I am right and you are wrong.

[ST]

I've corrected you already, therefore you are wrong. No mathematical lecturer would fail to comprehend why there is more than one correct solution to this equation.

[burnz]

no wonder hitler lost the war
http://www.youtube.com/watch?v=bwpWw-iVKHc

[shedcoupe]

Originally Posted by burnz

no wonder hitler lost the war
http://www.youtube.com/watch?v=bwpWw-iVKHc

Burnz, you have made the most cogent remark thus far.
I think I've peed my pants (leather) laughing.

And Tadka, you are a very sick puppy for starting this one.

[Rodp]

It may be time for me to consider a new career in Mathematics.

[Stefan]

^^^^ You may need to consider learning about multiplication by juxtaposition before you do.

[SEZ213]

Originally Posted by Stefan

^^^^ You may need to consider learning about multiplication by juxtaposition before you do.

Oh my dear god, get over it. Don't purport to be perfect, please. All answers I got equaled 288, you got 2. What does it matter?

The answer was 'both' because of something that is ambiguous...but you appear to think that's wrong too.

Are you trying to prove your mathematician status now? Still?

[shedcoupe]

Good on ya Sez.
The obvious solution : 2 + 288 = 290, now average it out :
290 ÷ 2 = 145

The correct and only answer is 145.
Grumpy people happy now ?

Now that's settled, so what's the answer to this one ? 24 ÷ 2(9 + 3)

[FGII-XR6]

There is a hierarchy that is applicable to all equations that is absolute left to right only applies after taking this hierarchy into account so all calculation in the same level of the hierarchy are performed let to right .
I will give you a scenario to contemplate. a nuclear reactor is designed using a number of equations that use correct mathematical principal (BOMDAS) and this is handed over to someone who has a poor understanding of correct mathematical procedure to construct this results in components required for reactor safety to be of the incorrect specs the reactor is built and as soon as it is put under load it goes into meltdown and wiped out 5 million people all because he just went left to right
In my trade if you calculate incorrectly you can end up with an unsafe electrical installation putting people and infrastructure at risk. So maybe you understand the importance of hierarchy of calculations
I design databases and maintaining this hierarchy is difficult or impossible in a single query at times so I then either use multiple queries daisy chained to achieve a correct result or rework the calculation so it can be performed in the correct order when this is a viable option

Originally Posted by ST

Did everyone happen to miss my last post? BOTH answers are correct. END. THREAD.

Also au3xr6 solving an equation left to right IS very much a fundamental mathematical principal. You are completely wrong to think otherwise.



http://math.about.com/library/weekly/aa040502a.htm

[Dr Smith]

If the equation were part of my tax assesment then for my liabilities I say the answer is 2, for a refund I say the answer is 288.

[shedcoupe]

Originally Posted by Dr Smith

If the equation were part of my tax assesment then for my liabilities I say the answer is 2, for a refund I say the answer is 288.

[Road Games]

Originally Posted by shedcoupe

Good on ya Sez.


Now that's settled, so what's the answer to this one ? 24 ÷ 2(9 + 3)

24 ÷ 2(9 + 3)

12 x 12

144

[burnz]

and around we go again.












144

[kenz]

[shedcoupe]

Originally Posted by PRODIGAL SON

24 ÷ 2(9 + 3)

12 x 12

144

I reckon that the answer is "1" (pouts)

But I'm willing to compromise, so :

1 + 144 = 145
average answer = 145 ÷ 2 = 42 (well that's what the mice reckon)

[buggo]

Originally Posted by Stefan

^^^^ Stop posting everyone the authority has spoken.

Two different answers yet both are correct....

Clearly you have never done quadratic equations...

Just because you think something is how you see it, doesn't mean it's always the case.

[GTP 290]

Hey guys, is this glass half full or half empty?

[FGII-XR6]

1/2 full but some will se it as 1/2 empty In this case both answers are correct it is just an indication of your state of mind and level of optimism. this is unlike the equation where only the answer derived form correct procedure is correct

[burnz]

Originally Posted by GTP 290

Hey guys, is this glass half full or half empty?

half full..

if it was alcohol (vodka/ouzo) it's half empty and needs a top up..

[SEZ213]

Originally Posted by au3xr6

1/2 full but some will se it as 1/2 empty In this case both answers are correct it is just an indication of your state of mind and level of optimism. this is unlike the equation where only the answer derived form correct procedure is correct

It's actually not different at all, and as has been previously stated, dependent on which methodology is used to calculate the equation (bearing in mind that there are two)...the resulting answer will depend on how you've been taught.

[SEZ213]

Originally Posted by burnz

half full..

if it was alcohol (vodka/ouzo) it's half empty and needs a top up..

You take the vodka, I'll take the ouzo! Refill sir!

[prydey]

Originally Posted by NC1183

But to do the "brackets" part of the equation, you have to take the 2 into consideration as-well. every person i have spoken to, some taught maths over 40years ago, some only recently finished high school, all say the same thing. A number immediately before a set of brackets with no operator means you multiply what is in the brackets by that number

i saw the thread and thought how hard can that be, so clicked on it and saw 11 pages!! i thought 'oh, must be an old thread', so checked the date of the OP and couldn't believe it. surely this is some kind of record!!

for what is worth, my first thought was 2, due to me working it out as described by NC1183 above. given the lack of sign between the 2 and brackets, i believe that is part of that equation.

then i read the alternative and thought - bugger me, glad i left school.

[Deco28]

Originally Posted by Sezzy

It's actually not different at all, and as has been previously stated, dependent on which methodology is used to calculate the equation (bearing in mind that there are two)...the resulting answer will depend on how you've been taught.

THERE IS ONLY ONE CORRECT METHOD.

The only correct method is BOMDAS which yields an answer of 2.

You can argue all you like about the other answers but it just means that your teacher taught you the wrong thing and you are in fact WRONG.

Understand this.

[SEZ213]

Originally Posted by Deco28

THERE IS ONLY ONE CORRECT METHOD.

The only correct method is BOMDAS which yields an answer of 2.

You can argue all you like about the other answers but it just means that your teacher taught you the wrong thing and you are in fact WRONG.

Understand this.

Yeah, you're right, BODMAS is correct, I never disputed that...

I'll ask you the same question that I asked Stefan (which he never actually answered either)...if you are in fact the ONLY correct answer...

Why does EVERYTHING I OWN...indicate the answer is 288...?

My teacher may have taught me (and many others here) the wrong thing, but I really would like to see you argue with Sony, Casio, et. al.

I'll be waiting when you both figure it out...