This is why we're in a recession.
PEMDAS has failed us.
This is why we're in a recession.
PEMDAS has failed us.
how the fuck could calculators vary that much wtf lmao
they are arguing over that shit at /b/.. i have to add that calc pic
This is why i hate math.
It lies to us.
Niggas you are dumb, it's 2.
I learned Please Excuse My Dear Aunt Sally (PEMDAS) in school but I hear muthafuckas talkin about BEDMAS and i'm like wtf?
Brackets I guess?
Bro Excuse My Dear Aunt Sally?
Because it's not clear whether or not the (9+3) belongs in the numerator or denominator. Most calculators and computers would not put that in the denominator without a second set of brackets around this and the 2, and thus would give 288. Nobody is wrong or right (unless they're saying something other than 2 or 288). The question is ambiguous. This isn't even about PEMDAS. Even with the correct order of operation, you can still get both answers depending on how you interpret the problem
Has to do with the calculator using RPN
http://en.wikipedia.org/wiki/Reverse_polish_notation
Edit: Woozie got it.
http://i920.photobucket.com/albums/a...6227_large.jpg
http://i920.photobucket.com/albums/a...349039full.gif
http://i920.photobucket.com/albums/a...e/20110407.gif
http://i920.photobucket.com/albums/a...ovecraft02.jpg
http://i920.photobucket.com/albums/a...ovecraft06.jpg
http://i920.photobucket.com/albums/a...ovecraft10.jpg
Old?
http://i693.photobucket.com/albums/v...2378993371.jpg
I see a lot of these, This ones new to me.
In PEMDAS multiplication and division are considered the same rank. If you have multiple calculations of the same rank, you then decide priority by going left to right.
So, the (9+3) is highest priority, so you then have 48/2x12. The division has higher priority over multiplication now because it is to the left, so you then have 24x12. The correct answer is 288.
^No. Because maths.
See, this is the kind of thing you learn in elementary/secondary school but later on learn isn't that true. Woozie's explanation is bang on as the question itself is ambiguous using infix notation. Certainly to my knowledge, there's no "order of precedence" when reading an equation right to left or left to right, even with infix notation. Postfix or prefix notation solves that issue, but I gather those syntax systems are unknown outside of the fields computer science and mathematics.
Using your explanation Mellema would make teaching order of operations to grade-schoolers much easier. Much like how you get taught in high school chemistry that an atom is made up of a nucleus with some electrons orbiting around it like planets to a star. It's only when you get to your first-year chem class do you learn that explanation was right 80 years ago (and "untrue" today), but is still taught that way for the sake of simplicity.
http://latex.codecogs.com/gif.latex?\frac{48}{2(9+3)}
vs
http://latex.codecogs.com/gif.latex?\frac{48}{2}(9+3)
Like I said, it has nothing to do with PEMDAS and everything to do with how you interpret the equation. It's not clear which of those are meant in the original expression. Normally, people would put an extra parenthesis in the equation if they meant the first one (if, say, they're writing a computer code or something). But in handwritten math, the image posted is a legitimate way of writing both of the above expressions. Even when I'm helping people with math on these forums I'll often omit the second set of parenthesis because it's usually clear from context which of the above forms I'm using. But, in my calculator/matlab/fortran/etc, if I want the first expression, I have to put 48/(2(9+3)) or else it will assume the second.
lulz, made my day.
that's awesome, did anyone comment on it?
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