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Started By
Message
re: Spinoff: X=6/2(2+1)
Posted on 2/27/15 at 3:17 pm to buckeye_vol
Posted on 2/27/15 at 3:17 pm to buckeye_vol
quote:
I'm just saying that without any context, one should interpret it as written and not add any additional assumptions.
Oh, I'm saying the same thing. Just pointing it out
Posted on 2/27/15 at 3:17 pm to UserName69
6 3
_ _
2 1
That becomes 6 over 2 X 6 over 2
36/4 = 9
_ _
2 1
That becomes 6 over 2 X 6 over 2
36/4 = 9
Posted on 2/27/15 at 3:17 pm to buckeye_vol
quote:
I'm just saying that without any context, one should interpret it as written and not add any additional assumptions.
This is the same that I am saying, but I don't believe that "as written" means anything here. That's the point, it is not written in a way that the says one way or the other.
Posted on 2/27/15 at 3:19 pm to KG6
quote:What? When there are two operations at the same level of the hierarchy, you work left to right. That's not an assumption; that is how math is solved.
There is NOTHING that states you must do the division in the equation before distributing that A across the argument in the parenthesis except left to right. That's how people come up with 1. You state that you need to show the parenthesis around the entire denominator to do that operation first. I'm saying that you have to put the parenthesis around (6/2)to do that operation first. You are only doing that operation first because you are reading left to right. That is not enough to define the order of operations.
Posted on 2/27/15 at 3:21 pm to KG6
quote:Then you go with the method that requires the fewest assumptions (Occam's Razor). That is why calculators will result in 9. They only solve what is given as written.
This is the same that I am saying, but I don't believe that "as written" means anything here. That's the point, it is not written in a way that the says one way or the other.
Posted on 2/27/15 at 3:21 pm to buckeye_vol
There are 3 levels to PEMDAS.
Level 1 = Parentheses and Exponents
Level 2 = Multiply and Divide
Level 3 = Add and Subtract
X=6/2(1+2)
X=6/2(3) (At this point, Multiplication and division are at the same level. So it's which ever one comes first while going left to right.)
X=3(3)
X=9
Level 1 = Parentheses and Exponents
Level 2 = Multiply and Divide
Level 3 = Add and Subtract
X=6/2(1+2)
X=6/2(3) (At this point, Multiplication and division are at the same level. So it's which ever one comes first while going left to right.)
X=3(3)
X=9
Posted on 2/27/15 at 3:27 pm to buckeye_vol
quote:
hat's the point, it is not written in a way that the says one way or the other.
YES THE frick IT IS
Posted on 2/27/15 at 3:30 pm to buckeye_vol
[quote]you work left to right. That's not an assumption; that is how math is solved. quote]
This is not really true. Again, it's not like reading a sentence. You really need to put the parenthesis in there to show what to do first.
It wouldn't be such an argument if it was that clean cut. Obviously there are videos showing why people solve it both ways.
This is not really true. Again, it's not like reading a sentence. You really need to put the parenthesis in there to show what to do first.
It wouldn't be such an argument if it was that clean cut. Obviously there are videos showing why people solve it both ways.
This post was edited on 2/27/15 at 3:33 pm
Posted on 2/27/15 at 3:32 pm to buckeye_vol
quote:
Then you go with the method that requires the fewest assumptions
Exactly.
That's why you have assumptions, for when something is not written clearly enough to completely define it. And one of those assumptions/methods is Left to Right
(*Note: that / in between assumptions and methods is meant to be a slash, not a division sign)
*Another note: The parentheses around the first note don't mean you have to read the note first.
Third note: You don't have to multiply the notes by anything, those are just asteriskseses.
This post was edited on 2/27/15 at 3:33 pm
Posted on 2/27/15 at 3:38 pm to KG6
quote:It is like reading a sentence, unless there is an operation that must be solved first; you don't need parantheses to indicate that it should be solved left to right. If I wrote 3-2+1, I would always solve 3-2 first. I don't have to put (3-2)+1 because the parantheses are redundant. BUT if I wanted 2+1 solved first, I would have to use parantheses, 3-(2+1).
This is not really true. Again, it's not like reading a sentence. You really need to put the parenthesis in there to show what to do first.
This post was edited on 2/27/15 at 3:41 pm
Posted on 2/27/15 at 3:42 pm to Indigold
quote:We may be splitting hairs, but I would call left to right a rule rather than an assumption because it is the default to avoid having to make an assumption.
Exactly.
That's why you have assumptions, for when something is not written clearly enough to completely define it. And one of those assumptions/methods is Left to Right
Posted on 2/27/15 at 3:43 pm to KG6
quote:Because there is a reasonable explanation for a method, doesn't mean that it is the equivalent to the other method. And the alternative explanation doesn't imply that the rules are debatable. In other words, math is done left to right, within the hierarchy of operations; arguing ambiguity in that statement would be the wrong explanation.
It wouldn't be such an argument if it was that clean cut. Obviously there are videos showing why people solve it both ways.
This post was edited on 2/27/15 at 3:52 pm
Posted on 2/27/15 at 3:52 pm to buckeye_vol
quote:
We may be splitting hairs, but I would call left to right a rule rather than an assumption because it is the default to avoid having to make an assumption.
You're right. I was more focused on my (*Notes) joke when I was writing that
Posted on 2/27/15 at 3:54 pm to Indigold
The way the problem is written out is what confuses people. Obviously.
Just think of it as two fractions. But that math may be too advanced for some of the OT.
Just think of it as two fractions. But that math may be too advanced for some of the OT.
Posted on 2/27/15 at 3:55 pm to Indigold
quote:Haha and I didn't even read them until just now. I must have been too busy multiplying the notes that I never actually read them.
You're right. I was more focused on my (*Notes) joke when I was writing that
This post was edited on 2/27/15 at 3:57 pm
Posted on 2/27/15 at 4:25 pm to buckeye_vol
Holy crap... 9 pages? How is this even debatable?
Posted on 2/27/15 at 7:52 pm to BoostAddict
It's obviously 9. Anyone still arguing 1 has to be a troll
Posted on 2/27/15 at 8:19 pm to Grim
People are actually arguing the answer is 1?
Posted on 2/27/15 at 8:40 pm to BoostAddict
quote:when this same thread was posted a year ago, it went to 20+ I think
Holy crap... 9 pages?
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