Just a simple math question for all to enjoy...
I know the answer is 1 and can explain it but this has blown up the internet world
Frederick Law wrote: The answer depends on where you learn math.The answer is 1 or 16.Internet allow people argue across far distance.
Frederick Law wrote:
The answer depends on where you learn math.
The answer is 1 or 16.
Internet allow people argue across far distance.
The answer is 1. PEMDAS - Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
8/8 = 1
I know everything started from primitive and is going into more and more complex. What is the direct relevancy between simple math and internet world?
It just keeps popping up on Twitter and Facebook and I even saw it on my favorite Climate change website. It's just one of those fun math problems that gets everyone talking.
Depending on where you learn math the answer is pretty much infinite and even including the alphabet like. "I don't know", "Huh!?", "What's that?" or "I find your strange combination of Arabic numerals frightening"
What's really more frightening is that Excel does these problems incorrectly which is why pretty much every complex formula I have in Excel ends up with about 10 times more parens than it needs to have.
...and this is how the argument (discussion) starts, right.
There is only one answer
Steve....might I suggest you get out more often....
Show you work (as your teacher probably said many years ago) and use your brain not your calculator
Steve Calvert - as the Germans would say......
Ach!!! Was ist das.
8 / 2 (2+2) =
Huh, I plugged it into Excel and Mathcad and both results are incorrect...
The problem wasn't defined properly.
Sure it is
Steve Calvert wrote: Show you work (as your teacher probably said many years ago) and use your brain not your calculator Steve C
Steve Calvert wrote:
I did that, and I got 16. I'm just a dumb ex-carpenter and not an engineer, and it's been a long time since I was in school, so maybe someone could explain where I went wrong?
And that's what many others got as well Glenn Schroeder. I'm not an Engineer either, even though I play one at work but I remembered something from school many years ago and it stayed in my mind.
I don't mind showing my work at all. In fact I like to because when I do a series of calcs and come Back to it a month later I can see how badly I messed it up in the first place :-)
That being said I don't like doing extra work because software doesn't do math correctly. You shouldn't have to add extra parens because the software does not know the order of operations.
I think there is an operator missing...?!
I guess you mean 2*(2+2)
PEMDAS - Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
Thank you for that. While I know there is an order of operations I always end up getting it wrong and or looking it up to get it right.
I didn't get to see this trend start on the internet but I find it an interesting topic to discuss. I'm sure there are some cultures that see it differently then others.
I'd like to hear an explanation on the whole Excel thing, why does it need more parenthesis and equation signs to work? Is this something more related to programming rules?
Always the parenthesis are resolved first
Now that I'm explaining it is a little more subtle and I can see where there's an issue.
Because the 2(2+2) is close together, I assumed they are "grouped" and that's a big assumption. To be completely clear it should have a parenthesis around it. But the spaces around the division symbol made it clear what the intent was to me (resolve the 2(2+2) before dividing)...If that makes sense.
I'm sure there are some cultures that see it differently then others.
I'm pretty sure the mathematical operations order is universal and not cultural. I'll let Steve answer that though.
The US placed 38th out of 71 countries in mathematics....that is all the explanation you need to know to understand why a software program developed here doesn't do math right :-)
That's part of the problem.
Write it out full:
8 / 2 * (2 + 2)
= 8 / 2 * 4
= 4 * 4
Matt Peneguy wrote: Always the parenthesis are resolved first(2+2)=4Now that I'm explaining it is a little more subtle and I can see where there's an issue.Because the 2(2+2) is close together, I assumed they are "grouped" and that's a big assumption. To be completely clear it should have a parenthesis around it. But the spaces around the division symbol made it clear what the intent was to me (resolve the 2(2+2) before dividing)...If that makes sense.
Matt Peneguy wrote:
So, actually the answer is 16. It would have been 1 if there had been parentheses around 2(2+2).
This is well defined:
Except you're dividing before finishing your multiplications.
= 8 / 8
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