Solve 48÷2(9+3)
Apparently this is a really popular thing making the rounds and tends to see about a 50/50 split about what the right answer is. I'll post the right answer and why later or tomorrow or something.
04-08-2011 03:25 AM
#1
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Solve 48÷2(9+3)Solve 48÷2(9+3) | |
Last edited by spoonitnow; 04-08-2011 at 03:39 AM. | |
04-08-2011 03:28 AM
#2
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2 obv | |
04-08-2011 03:32 AM
#3
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04-08-2011 03:34 AM
#4
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looks like i won the flip | |
04-08-2011 03:38 AM
#5
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I worked harder on sophomore geometry/pre-trig than any other class, yet didn't understand anything, to this day have no clue what sine cosine and tangent are, and how the fuck I was able to barely pass with a D+. I can't even do my niece's third grade long division anymore. I'm a math neanderthal |
04-08-2011 03:40 AM
#6
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04-08-2011 03:43 AM
#7
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I wonder if writing it as 48/2(9+3) changes how people see it. | |
04-08-2011 03:43 AM
#8
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04-08-2011 05:11 AM
#9
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04-08-2011 05:44 AM
#10
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This is a good one. | |
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04-08-2011 05:45 AM
#11
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04-08-2011 07:42 AM
#12
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BEDMAS, MF-ERs. | |
04-08-2011 07:49 AM
#13
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It's 288 where I come from. | |
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04-08-2011 07:53 AM
#14
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04-08-2011 07:59 AM
#15
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Anyway my answer is that there's a bracket missing and so the problem is ambiguous. | |
04-08-2011 08:09 AM
#16
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I used to be a math major... and I get 2 following parenthesis first rule {PMDAS} | |
04-08-2011 08:29 AM
#17
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LEFT TO RIGHT GAIZ, LEFT TO RIGHT. | |
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04-08-2011 08:30 AM
#18
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288 | |
04-08-2011 08:34 AM
#19
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Okay so the answer is..... | |
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04-08-2011 08:44 AM
#20
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It's not that I think multiplication comes before division. Brackets come first. You do the inside of the brackets and then the multiplication of brackets with the 2. | |
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04-08-2011 08:49 AM
#21
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04-08-2011 09:05 AM
#22
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I agree with you if you restate the equation as such: | |
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04-08-2011 09:15 AM
#23
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the division symbol is gay. slashes are a man's notation | |
04-08-2011 09:16 AM
#24
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@spoon- please provide a reputable source that backs up your claim | |
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04-08-2011 09:21 AM
#25
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It's always been brackets first and then the rest is done left to right. The multiplication is just assumed after solving the bracket while going left to right. You always go left to right with division and multiplication then again for addition subtraction. | |
Last edited by jyms; 04-08-2011 at 09:30 AM. | |
04-08-2011 09:23 AM
#26
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04-08-2011 09:35 AM
#27
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Cool thread. | |
Last edited by a500lbgorilla; 04-10-2011 at 08:43 PM. | |
04-08-2011 09:46 AM
#28
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The Order of Operations: More Examples | |
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04-08-2011 09:51 AM
#29
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Last edited by a500lbgorilla; 04-08-2011 at 09:56 AM. | |
04-08-2011 10:09 AM
#30
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I got 2 |
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04-08-2011 10:37 AM
#31
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24*12 = 288 | |
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04-08-2011 11:49 AM
#32
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saw this on 2+2 yesterday. My initial reaction was 288, but i convinced myself it should be 2 when i voted. | |
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04-08-2011 12:24 PM
#33
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I agree with this. But not with this... | |
Last edited by kevster; 04-08-2011 at 12:27 PM.
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04-08-2011 12:36 PM
#34
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coinflip imo |
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04-08-2011 12:55 PM
#35
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obv 145 | |
04-08-2011 01:26 PM
#36
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04-08-2011 03:09 PM
#37
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I think everyone who says 288 is wrong, for 2 reasons. | |
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04-08-2011 03:12 PM
#38
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I was always taught that you solve the bracket first and when you do you no longer treat it as such. It's just left to right multiply and divide and then left to right add and subtract. | |
04-08-2011 03:18 PM
#39
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Ignoring half of what I wrote, but focusing on the first bit, how would you solve: | |
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04-08-2011 03:23 PM
#40
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This word makes you incorrect. | |
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04-08-2011 03:25 PM
#41
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04-08-2011 03:26 PM
#42
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There's no reason to follow up, but yes. You would ever end up with 288 if you treat it correctly as (48/2)*x or no you wouldn't ever end up with 288 if you treat it correctly as 48/(2x). | |
Last edited by a500lbgorilla; 04-10-2011 at 08:45 PM. | |
04-08-2011 03:40 PM
#43
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pretty much this, I voted 2, but for the answer to be correctly 2 it should be written as follows: | |
04-08-2011 03:40 PM
#44
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04-08-2011 03:59 PM
#45
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04-08-2011 04:15 PM
#46
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I'm changing my vote. I vote for 288 now instead of 2. | |
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04-08-2011 04:17 PM
#47
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Pi are round, cornbread are square | |
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04-08-2011 04:48 PM
#48
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Parentheses are solved first.. and that does not get extended to the multiplied number outside.. | |
Last edited by Lukie; 04-08-2011 at 04:56 PM. | |
04-08-2011 04:54 PM
#49
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48/2(9+3) | |
04-08-2011 05:01 PM
#50
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A) Wow thanks for the math lesson, cuz like, totally, no one mentioned how this maffs is sposed' to be done in this thread already! | |
04-08-2011 05:17 PM
#51
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A. No problem. I think it is helpful at times to explain some math 'tricks' and 'shortcuts' so to speak. It's one of the reasons that I think Sklansky's non-poker posts on 2p2 tend to be pretty good. While it's likely there are many mathematicians out there that understand complex maths better than DS, he has a way of simplifying things so that the layperson can understand it better. I'm glad you were able to get something of value from my post. | |
04-08-2011 05:20 PM
#52
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04-08-2011 05:27 PM
#53
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04-08-2011 05:52 PM
#54
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2(5)^2 | |
04-08-2011 06:26 PM
#55
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1+1= : | |
04-08-2011 06:32 PM
#56
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04-08-2011 07:13 PM
#57
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in so fucking glad i finished math a long time ago so i wont ever get punished again for this shit | |
04-08-2011 07:14 PM
#58
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I got it right....i am so smart....smrt.....smrart... | |
04-08-2011 07:49 PM
#59
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who gives a f*** anyway |
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04-08-2011 08:49 PM
#60
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04-08-2011 09:10 PM
#61
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04-08-2011 10:22 PM
#62
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Pretty funny that this thread is two pages long! | |
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04-09-2011 12:42 AM
#63
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^ Dont think so.... | |
Last edited by Vinland; 04-09-2011 at 12:44 AM. | |
04-09-2011 12:54 PM
#64
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Yah you're missing my point though. | |
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04-09-2011 10:29 PM
#65
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I voted two cos there is almost no doubt in my mind that that is how we learned it in school. But it's been too long and I did not keep the books. If I were to put it in the calculater I would always put extra brackets tho. | |
04-10-2011 02:31 PM
#66
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Calculate. | |
Last edited by !Luck; 04-10-2011 at 02:35 PM. | |
04-10-2011 03:26 PM
#67
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my TI-83 plus, TI-89, windows vista calculator (in scientific mode), and google calculator all give 288. | |
04-10-2011 03:34 PM
#68
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04-10-2011 03:44 PM
#69
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288 gee |
04-10-2011 03:46 PM
#70
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TI-85 - Wikipedia, the free encyclopedia | |
04-10-2011 03:50 PM
#71
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Exactly though nothing is necessarily 'telling' and nothing was necessarily 'corrected'. As there is no authority to decide which of the two orders of operations are correct, the problem is truly mathematically ambiguous. | |
Last edited by a500lbgorilla; 04-10-2011 at 03:55 PM. | |
04-10-2011 03:55 PM
#72
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04-10-2011 04:30 PM
#73
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meh.. the TI-85 is almost 20 years old and was replaced by the TI-86.. the 86 returns 288 as does the TI-83+ and TI-89 that I own. | |
04-10-2011 04:34 PM
#74
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No you can agree that we just have to agree to disagree, but the original problem is ambiguous and that has been made very clear in this thread. | |
Last edited by a500lbgorilla; 04-10-2011 at 04:52 PM. | |
04-10-2011 04:53 PM
#75
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The point is that the collective brainpower of google, bing, texas instruments and all current scientific calculators that I'm aware of all come to a consensus.. so your position then is that they are all wrong or that they all came to the same conclusion by coincidence. | |