Facebook pet peeve (this one in particular)

[kommisar]

Re: Facebook pet peeve (this one in particular)

Yes.

You can write it as 48/(2(9+3)) if you mean it that way
or (48÷2)*(9+3) if you mean it that way

or

48
_____
2(9+3)

or however else you want -- all that matters is that it's clear and consistent.

I thought multiplications like these 2(4+6) had priority over 2x2 style multiplications.

maybe im just dum

[Arntonach]

Re: Facebook pet peeve (this one in particular)

Aren't all of these pet peeves just confirmation bias? I know it being brought up on Facebook is a big pet peeve because it shows that people would rather accept a cozy lie than question themselves, but does it happen THAT often?

For a personal one, I remember my Mom forwarding an image that said guns and the bible should be the two things added to children's curriculum. Yeah no.

[.Layne.]

Re: Facebook pet peeve (this one in particular)

do u guys remember kony 2012


how many ppl actually supported this?? none.

the end

[Zapmeister]

Re: Facebook pet peeve (this one in particular)

re order of operations, implied multiplication, etc: people will NEVER have a standardised order of operations beyond the well recognised pemdas (u.s.a.) / bodmas (britain) acronyms, owing to pure laziness when writing maths expressions, so there's no real point in debating. this includes implied multiplication. for instance, go to google, and wolfram alpha, and type

y = ln 3/x

the two of them parse it differently, based on someone's whim who decided to put the order of operations into the calculator in the first place.

[Reincarnate]

Re: Facebook pet peeve (this one in particular)

I thought multiplications like these 2(4+6) had priority over 2x2 style multiplications.

maybe im just dum

Yeah that's part of the issue -- IIRC it's called "multiplication by juxaposition" where you put things together that are implicitly assumed to be one mathematical unit.

For instance if I asked you what 10/ab was, where a=2 and b=5, what would you say? Most would say 1, others might say 25. It's because normally when you see ab together like that, it's assumed to be something like (ab), so it's the same as being asked to calculate 10/(ab). But if you weren't making that assumption then it's possible you could parse it like (10/a) * b.

In other words, even though the operators are in the same order when we are looking at 10/ab and 10/a*b, we might make different assumptions about how it's computed. PEMDAS is only part of the story.

I mean math is a language in itself, and like other languages, we need to be clear if we want to avoid ambiguity and be interpreted correctly by others. You can't go wrong with parentheses.

[ssbmchamp]

Re: Facebook pet peeve (this one in particular)

so you've never used twitter before, i see.

Hell no! A bunch of my friends have it and showed me how it works and why they think it's so "amazing"......which was not very convincing.

[Xx{Midnight}xX]

Re: Facebook pet peeve (this one in particular)

There's so many stupid things that happen on Facebook. Like people who post those SCROLL LIKE COMMENT shits and the like I'd never finish writing this post if I even limited myself to half of them.

I have reddit for stuff like that.

[popsicle_3000]

Re: Facebook pet peeve (this one in particular)

or the posts that force you to 'like' a page or allow an app before you can see it.
dumb!

[justin_ator]

Re: Facebook pet peeve (this one in particular)

I was over at Shadow1800's house and we were scrolling through facebook and saw one of these, here's the video:

[qqwref]

Re: Facebook pet peeve (this one in particular)

To me implying there is one Mathematically Correct Way to parse "1+1-1" is like implying that there is one way to parse "They fed her dog meat.". Math is a type of language too, and any language written for human use can sometimes be ambiguous. I think one problem is in the way math is taught - at least in the US, through high school, the emphasis seems to be on treating math as some kind of brainless symbol-manipulation exercise where the person who can plug stuff in the best gets the best grades. I can easily see how someone could come out of that thinking that there is exactly one right answer to everything, which they can get by asking someone who is good at math, and that once they have found that answer they can immediately assume everything else is categorically wrong.

That said, I generally try to avoid math problems by anyone who uses ÷ to represent division.

[adlp]

Re: Facebook pet peeve (this one in particular)

i generally try to avoid people that associate with the MLP fandom

[Reincarnate]

Re: Facebook pet peeve (this one in particular)

To me implying there is one Mathematically Correct Way to parse "1+1-1" is like implying that there is one way to parse "They fed her dog meat.". Math is a type of language too, and any language written for human use can sometimes be ambiguous. I think one problem is in the way math is taught - at least in the US, through high school, the emphasis seems to be on treating math as some kind of brainless symbol-manipulation exercise where the person who can plug stuff in the best gets the best grades. I can easily see how someone could come out of that thinking that there is exactly one right answer to everything, which they can get by asking someone who is good at math, and that once they have found that answer they can immediately assume everything else is categorically wrong.

That said, I generally try to avoid math problems by anyone who uses ÷ to represent division.

Agreed -- I've always maintained that math needs to be taught in conjunction with applied problem solving, which we just don't see nowadays. Math is basically taught in a vacuum. It's not easy to retain mathematical understanding when it's not ever... well, used. "Plug and chug" is about as far as people go. There is some serious art behind math that a lot of people never get to intuit because it's taught so poorly.

[JohnRedWolf87]

Re: Facebook pet peeve (this one in particular)

A friend on Facebook just posted this gem:



I let her know that many illegal immigrants DO actually pay taxes, and asked her when she plans on registering her gun.

[Jonlovesddr]

Re: Facebook pet peeve (this one in particular)

i generally try to avoid people that associate with the MLP fandom

lol this

[adlp]

Re: Facebook pet peeve (this one in particular)

i also posted

on my facebook last month anyway