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re: Bizarre Math Question and Answer breaks the internet - Sorry if already posted
Posted on 4/15/15 at 2:06 pm to KosmoCramer
Posted on 4/15/15 at 2:06 pm to KosmoCramer
48/(2(9+3))=2
48/(2(12))=2
48/(24)=2
2=2
Or
48/(2(9+3))=2
24/(9+3)=2
2=2
Or
48/(2(9+3))
48/(2(12))
4/2=2
2=2
Am I missing something?
48/(2(12))=2
48/(24)=2
2=2
Or
48/(2(9+3))=2
24/(9+3)=2
2=2
Or
48/(2(9+3))
48/(2(12))
4/2=2
2=2
Am I missing something?
5
Posted on 4/15/15 at 2:07 pm to NYNolaguy1
You're missing a lot of order of operations.
More precisely, you added a bunch of parentheses that weren't in the problem. You can't do that.
More precisely, you added a bunch of parentheses that weren't in the problem. You can't do that.
This post was edited on 4/15/15 at 2:09 pm
Posted on 4/15/15 at 2:08 pm to LNCHBOX
quote:I entered the division sign, not /. That should not change anything in this equation. The only way to make this 2 would be to make the eqaution thus
But are you entering "/" instead of a division sign? That's the only reason for any debate.
48 ÷ (2(9+3)) Now the answer is 2
or 48/(2(9+3)) now the answer is 2
Posted on 4/15/15 at 2:08 pm to NYNolaguy1
quote:
Am I missing something?
If you're attempting to work the problem incorrectly. There are many more ways other than the 3 you posted.
Posted on 4/15/15 at 2:09 pm to NYNolaguy1
quote:You completely changed the equation by adding parenthesis
Am I missing something?
Posted on 4/15/15 at 2:09 pm to NYNolaguy1
All of those are correct, and the answer to the original equation is still 288. 
Posted on 4/15/15 at 2:09 pm to KosmoCramer
I think it's 288
Posted on 4/15/15 at 2:09 pm to NYNolaguy1
quote:
Am I missing something?
You're adding an extra parenthesis after the divide sign.
It actually reads 48*(1/2)*(9+3)
Posted on 4/15/15 at 2:09 pm to GRTiger
quote:Yeh he just completely changed the equation
All of those are correct, and the answer to the original equation is still 288.
Posted on 4/15/15 at 2:10 pm to terd ferguson
He is obviously not finished writing.
288
The M and D are interchangeable and worked left to right.
288
The M and D are interchangeable and worked left to right.
This post was edited on 4/15/15 at 2:17 pm
Posted on 4/15/15 at 2:12 pm to TigerRob82
Distributive property.
There, that should fuel this thread for at least three more pages. Mathlete for my amusement!
There, that should fuel this thread for at least three more pages. Mathlete for my amusement!
Posted on 4/15/15 at 2:16 pm to therick711
quote:
Distributive property.
48 / 2(9+3)
24*(9+3)
216 + 72 = 288
Posted on 4/15/15 at 2:16 pm to lsupride87
So y'all are reading it as:
(48/2)(9+3) ?
I haven't seen that division symbol since 8th grade... and yes I am an engineer.
(48/2)(9+3) ?
I haven't seen that division symbol since 8th grade... and yes I am an engineer.
Posted on 4/15/15 at 2:17 pm to TigerRob82
quote:
The M and D are interchangeable and worked left to right.
Even though you we were taught that in grade school it is not necessarily set in stone anymore....
quote:
However, there are examples, including in published literature, where implied multiplication is interpreted as having higher precedence than division, so that 1/2x equals 1/(2x), not (1/2)x. For example, the manuscript submission instructions for the Physical Review journals state that multiplication is of higher precedence than division with a slash,[5] and this is also the convention observed in prominent physics textbooks such as the Course of Theoretical Physics by Landau and Lifshitz and the Feynman Lectures on Physics.[6] Wolfram Alpha changed in early 2013 to treat implied multiplication the same as explicit multiplication (formerly, implied multiplication without parentheses was assumed to bind more strongly than explicit multiplication). 2x/2x, 2*x/2*x, and 2(x)/2(x) now all yield x2.[7] Newer TI calculators (TI 83 or later) also yield x2 in all three cases.
ETA: this is why a calculator will give you two different answers depending on whether you use the "x" symbol for multiplication or just leave it out.
This post was edited on 4/15/15 at 2:19 pm
Posted on 4/15/15 at 2:19 pm to StinkBait72
I vote for 2, but nobody should ever write a problem that way.
Posted on 4/15/15 at 2:19 pm to NYNolaguy1
There is no way you're an engineer and making the posts you've made in this thread.
Posted on 4/15/15 at 2:19 pm to NYNolaguy1
quote:No, we are reading it as this
So y'all are reading it as:
(48/2)(9+3) ?
48 ÷ 2(9+3)
which is the same as
48 ÷ 2 x (9+3)
which tne becomes
48 ÷ 2 x 12
which we then go left to right
48 ÷ 2 is 24
24x 12 = 288
Posted on 4/15/15 at 2:21 pm to StinkBait72
quote:So are some mathematicians now arguing multiplication should take precedence over division? I did not see that in school as of 2010.
Even though you we were taught that in grade school it is not necessarily set in stone anymore....
Posted on 4/15/15 at 2:21 pm to lsupride87
quote:
No, we are reading it as this
48 ÷ 2(9+3)
which is the same as
48 ÷ 2 x (9+3)
This is not true, see above or plug both into a calculator exactly as shown above.
Posted on 4/15/15 at 2:23 pm to lsupride87
From what I read is coming more from the physics side of the aisle
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