Poll |
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1+2*2=? |
5 |
 
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85% |
[ 143 ] |
6 |
 
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15% |
[ 25 ] |
Total Votes : 168 |
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![[Post New]](/s/i/i.gif) 2011/09/19 11:59:39
Subject: Re:Simple Maths 1+2*2=?
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Helpful Sophotect
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sebster wrote: If maths was taught left to right it wouldn't suddenly get dumber or less capable of describing anything. It'd still be maths, it's just the form of notation would change.
Actually, it would make a lot of common thing harder to write down.
ab + cd would become ( ab ) + ( cd )
That might not seems like much, but when dealing with polynomials like
ax^3 + bx^2 + cx + d
it can be annoying.
Sums of product are really common, but products of sum are not that common.
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![[Post New]](/s/i/i.gif) 2011/09/19 15:29:35
Subject: Re:Simple Maths 1+2*2=?
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Lord Commander in a Plush Chair
In your base, ignoring your logic.
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mrondeau wrote:
Sums of product are really common, but products of sum are not that common.
That's why its only 'sum' instead of 'all'.
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![[Post New]](/s/i/i.gif) 2011/09/19 15:55:00
Subject: Re:Simple Maths 1+2*2=?
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Elite Tyranid Warrior
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I can understand the average forum goer missing the question: d f(x) / dy 5x^2 + x - 7 = ?
But to miss: 1 + 2 * 2 = ?
FYI: d f(x) / dy 5x^2 + x - 7 = 10x + 1
1 + 2 * 2 = 5
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This message was edited 2 times. Last update was at 2011/09/19 16:09:04
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![[Post New]](/s/i/i.gif) 2011/09/19 16:47:10
Subject: Re:Simple Maths 1+2*2=?
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Decrepit Dakkanaut
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Zyllos wrote:I can understand the average forum goer missing the question: d f(x) / dy 5x^2 + x - 7 = ?
But to miss: 1 + 2 * 2 = ?
FYI: d f(x) / dy 5x^2 + x - 7 = 10x + 1
1 + 2 * 2 = 5
∫sinxcosx
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![[Post New]](/s/i/i.gif) 2011/09/19 16:57:29
Subject: Re:Simple Maths 1+2*2=?
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Elite Tyranid Warrior
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corpsesarefun wrote:
∫sinxcosx
Oops, did derivative...you want anti-derivative...
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This message was edited 1 time. Last update was at 2011/09/19 16:58:47
- 3000+
- 2000+
Ogres - 3500+
Protectorate of Menoth - 100+ |
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![[Post New]](/s/i/i.gif) 2011/09/19 17:23:02
Subject: Simple Maths 1+2*2=?
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Longtime Dakkanaut
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I'm an Engineer, have been for a couple of years, I graduated from a well respected College in the area and have always enjoyed math. I have a brother who is considerably younger then me. One night he asked me for help doing his freshman high school math homework, I helped him we got through all of the problems he understood what he was tought and all was grand in the world. He gets the assignment back several days later only to find out he failed, he got none of the questions right. The teacher didn't provide her answers, so I go back over the work to try and find out where we went wrong. I did the problem using higher level math and still got the same answers. I finally emailed the problems off to a mathmatics professor I had in college that I'm friends with, he gets the same answers. Through my parents I arrange to have a meeting with this teacher so she could show me what we did wrong. It turned out that she didnt actually look at his work, she just compaired her answers to those on the paper.... Her answers were in decimals, my brothers were left in fractions...
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![[Post New]](/s/i/i.gif) 2011/09/19 17:23:59
Subject: Re:Simple Maths 1+2*2=?
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Decrepit Dakkanaut
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Zyllos wrote:corpsesarefun wrote:
∫sinxcosx
Oops, did derivative...you want anti-derivative...
It isn't too hard, I just felt this thread wasn't complete without some integrals.
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![[Post New]](/s/i/i.gif) 2011/09/19 17:24:03
Subject: Simple Maths 1+2*2=?
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5th God of Chaos! (Yea'rly!)
The Great State of Texas
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AndrewC wrote:After the failure to show the poll in the other thread, I'll try again.
What is the answer to the above maths question? It came up earlier this evening and ended up with 6 at 6 and 3 at 5.
I just wondered what other people thought?
Cheers
Andrew
Well it is the Off Topic Forum! 
The only proper response from a lawyer is: what number do you want it to be?
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-"Wait a minute.....who is that Frazz is talking to in the gallery? Hmmm something is going on here.....Oh.... it seems there is some dispute over video taping of some sort......Frazz is really upset now..........wait a minute......whats he go there.......is it? Can it be?....Frazz has just unleashed his hidden weiner dog from his mini bag, while quoting shakespeares "Let slip the dogs the war!!" GG
-"Don't mind Frazzled. He's just Dakka's crazy old dude locked in the attic. He's harmless. Mostly."
-TBone the Magnificent 1999-2014, Long Live the King!
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![[Post New]](/s/i/i.gif) 2011/09/19 17:55:15
Subject: Re:Simple Maths 1+2*2=?
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Warplord Titan Princeps of Tzeentch
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corpsesarefun wrote:∫sinxcosxdy
Since there's no variable of integration, I'm going to assume this one.
So the answer is sinxcosx.
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text removed by Moderation team. |
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![[Post New]](/s/i/i.gif) 2011/09/19 18:06:18
Subject: Re:Simple Maths 1+2*2=?
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Elite Tyranid Warrior
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biccat wrote:corpsesarefun wrote:∫sinxcosxdy
Since there's no variable of integration, I'm going to assume this one.
So the answer is sinxcosx.

LOL, thats cheating!
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- 3000+
- 2000+
Ogres - 3500+
Protectorate of Menoth - 100+ |
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![[Post New]](/s/i/i.gif) 2011/09/19 18:41:18
Subject: Re:Simple Maths 1+2*2=?
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Decrepit Dakkanaut
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biccat wrote:corpsesarefun wrote:∫sinxcosxdy
Since there's no variable of integration, I'm going to assume this one.
So the answer is sinxcosx.

Quiet you, standard notation is for fools.
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![[Post New]](/s/i/i.gif) 2011/09/19 19:07:28
Subject: Re:Simple Maths 1+2*2=?
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Ork Boy Hangin' off a Trukk
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GalacticDefender wrote:
Kudos to anyone who gets this reference.
Only if you work to 1 significant figure.
I'd love to see what these teachers would do with 1 2 2 * +
(appologies if that is wrong. My rpn is not very good).
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![[Post New]](/s/i/i.gif) 2011/09/19 20:20:08
Subject: Re:Simple Maths 1+2*2=?
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Fixture of Dakka
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sebster wrote:
GalacticDefender wrote:
Kudos to anyone who gets this reference.
It's from 1984.
Or, possibly a Radiohead song. Though in that case it's more "two and two always makes fiiiiiiiiiive".
Or a Radiohead song that was taken from an album inspired by Nineteen Eighty Four.... ^^
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![[Post New]](/s/i/i.gif) 2011/09/19 20:41:58
Subject: Simple Maths 1+2*2=?
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Decrepit Dakkanaut
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Or a radiohead song that is very, very good.
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This message was edited 1 time. Last update was at 2011/09/20 16:57:53
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![[Post New]](/s/i/i.gif) 2011/09/19 23:18:55
Subject: Simple Maths 1+2*2=?
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Lone Wolf Sentinel Pilot
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Yes, it is from 1984. Automatically Appended Next Post: Never heard the radiohead song.
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This message was edited 1 time. Last update was at 2011/09/19 23:19:16
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![[Post New]](/s/i/i.gif) 2011/09/19 23:45:14
Subject: Re:Simple Maths 1+2*2=?
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The Dread Evil Lord Varlak
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mrondeau wrote:Actually, it would make a lot of common thing harder to write down.
Possibly, I don't really work with higher math.
I don't really see the problem with adding more brackets, even if they're redundant I like having them in there as it adds clarity that I find I have to tease out otherwise. Then again, you should see my excel formulas, those things have stupid numbers of brackets in them.
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“We may observe that the government in a civilized country is much more expensive than in a barbarous one; and when we say that one government is more expensive than another, it is the same as if we said that that one country is farther advanced in improvement than another. To say that the government is expensive and the people not oppressed is to say that the people are rich.”
Adam Smith, who must have been some kind of leftie or something. |
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![[Post New]](/s/i/i.gif) 2011/09/23 10:23:33
Subject: Simple Maths 1+2*2=?
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Rampaging Khorne Dreadnought
Wollongong, Australia
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I can't believe people can get this question wrong...
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![[Post New]](/s/i/i.gif) 2011/09/23 10:55:10
Subject: Simple Maths 1+2*2=?
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Infiltrating Hawwa'
Through the looking glass
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Wow, even with PEMDAS in my head I still managed to screw that up. Stupid aunt sally, she's always plotting to undermine me.
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“Sometimes I can hear my bones straining under the weight of all the lives I'm not living.”
― Jonathan Safran Foer |
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![[Post New]](/s/i/i.gif) 2011/09/23 15:18:13
Subject: Re:Simple Maths 1+2*2=?
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Longtime Dakkanaut
St. Louis, Missouri
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I'm not going to lie...I answered "6"...
After seeing the results I remembered "Please Excuse My Dear Aunt Sally"...and think, I used to rock at Math...and it's only been three years since college!
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![[Post New]](/s/i/i.gif) 2011/09/23 16:36:09
Subject: Re:Simple Maths 1+2*2=?
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Fixture of Dakka
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biccat wrote:corpsesarefun wrote:∫sinxcosxdy
Since there's no variable of integration, I'm going to assume this one.
So the answer is sinxcosx.

+C
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![[Post New]](/s/i/i.gif) 2011/09/25 04:07:44
Subject: Simple Maths 1+2*2=?
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Regular Dakkanaut
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Nightwatch wrote:I remember always being confused with the whole BEDMAS thing as a kid - especially when they told us that the division and multiplication could be switched, as well as the addition and subtraction. It wasn't until late in high school that I figured our why.
Is it possible that the OP is incorrect? The teachers could be saying, do the multiplication/division from left to right, or do the addition/subtraction from left to right. I was told something to that effect when I questioned the system. The reason? No reason, it just shuts the kid up, and won't make a difference.
Interesting to see the acronyms that different cultures / generations come up with - PEMDAS, BEDMAS, BIDMAS, BOMDAS, etc. I imagine it's geographical area, though, not really the decade. Perhaps the parentheses / brackets, what with computers becoming much more common in the last few decades. Programming (at least currently) depends heavily on the use of brackets, and it's less of a mouthful than parentheseseses.
I'm finding it strange reading all these people who learned those acronyms for much the same reason - they seem to imply that multiplication must be done before division, and addition before subtraction, which is wrong.
I was taught the acronym BEMA: Brackets, Exponents, Multiplication (and division) Addition (and subtraction), which emphasizes that multiplication and division have the same precedence (and same with addition and subtraction), due to really being the same operations (division is just multiplication by the reciprocal, subtraction is just the addition of the negative).
I am wondering how many people would get this wrong:
6 - 7 + 3 = ?
The correct answer is 2, but I get the impression a lot of people following the longer acronyms which separate addition and subtraction would mistakenly solve it as 6 - 10 = -4
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![[Post New]](/s/i/i.gif) 2011/09/25 04:12:46
Subject: Re:Simple Maths 1+2*2=?
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Savage Khorne Berserker Biker
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corpsesarefun wrote:Zyllos wrote:I can understand the average forum goer missing the question: d f(x) / dy 5x^2 + x - 7 = ?
But to miss: 1 + 2 * 2 = ?
FYI: d f(x) / dy 5x^2 + x - 7 = 10x + 1
1 + 2 * 2 = 5
∫sinxcosx
Oh u-substitution, the days when you solved so many things.
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This message was edited 1 time. Last update was at 2011/09/25 04:13:04
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