rhineholt Posted April 28, 2011 Share Posted April 28, 2011 Okay, I'm sure you've all seen this question on Facebook. Now, I wanna see if you guys can get the right answer. Please say why you got the answer you did.. Link to comment Share on other sites More sharing options...
vendetta_revived Posted April 28, 2011 Share Posted April 28, 2011 1. As we were just talking. Link to comment Share on other sites More sharing options...
ryno Posted April 28, 2011 Share Posted April 28, 2011 I actually just got done reading it on Facebook. I got 1 cause I'm no dummy! Link to comment Share on other sites More sharing options...
Dr. B Posted April 29, 2011 Share Posted April 29, 2011 it's 1. as an expression it's not poorly written but as a calculator input it is. the people who get 9 are the people who use calculators because they need them, not to expedite arithmetic Link to comment Share on other sites More sharing options...
thatonethere Posted April 29, 2011 Share Posted April 29, 2011 The answer is one. To get the answer, you must follow the order of operations : P- Parenthesis E-Exponets M-Multiplication D- Division A-Addition S-Subtraction Here's how it's done by hand: get rid of parenthesis first by multiplying this 2(1+2) 2*1=2, and 2*2=4 the answer is 2+4 add these up and you get 6. Don't forget you still have to deal with the 6 in the beginning of the equation. You should end up with 6/6 divide 6 by 6 and you get 1 Link to comment Share on other sites More sharing options...
Chreees Posted April 29, 2011 Share Posted April 29, 2011 1. Duh. Link to comment Share on other sites More sharing options...
Arcane Posted April 29, 2011 Share Posted April 29, 2011 (edited) i got 9. The order of operations is more accurately stated as P, M/D, A/S. Where you solve multiplication and division, after terms in parentheses, from left to right. also, its help to treat the division as a inverse multiplicative. same goes for addition and subtraction. i read the equation as such. [b]6÷2(1+2)[/b] 6 x 1/2(read as one-half) x (1 + 2) = 6 x 1/2(read as one-half) x 3 = 3 x 3 = =9 Edited April 29, 2011 by Arcane Link to comment Share on other sites More sharing options...
rhineholt Posted April 29, 2011 Author Share Posted April 29, 2011 So is this equation one that can just have multiple answers? Or is there one set answer...? Link to comment Share on other sites More sharing options...
Arcane Posted April 29, 2011 Share Posted April 29, 2011 [quote name='Dr. B' timestamp='1304048508' post='507309'] it's 1. as an expression it's not poorly written but as a calculator input it is.[u][b] the people who get 9 are the people who use calculators because they need them,[/b][/u] not to expedite arithmetic [/quote] actually, those who got 9 are the people [i][u]who are right[/u][/i] btw, i didn't use a calculator either. Link to comment Share on other sites More sharing options...
rhineholt Posted April 29, 2011 Author Share Posted April 29, 2011 [quote name='Arcane' timestamp='1304051429' post='507323'] [quote name='Dr. B' timestamp='1304048508' post='507309'] it's 1. as an expression it's not poorly written but as a calculator input it is.[u][b] the people who get 9 are the people who use calculators because they need them,[/b][/u] not to expedite arithmetic [/quote] actually, those who got 9 are the people [i][u]who are right[/u][/i] btw, i didn't use a calculator either. [/quote] Idk Jay, i was taught to not always trust calculators because calculators usually don't follow PEMDAS. Link to comment Share on other sites More sharing options...
Arcane Posted April 29, 2011 Share Posted April 29, 2011 (edited) [quote name='rhineholt' timestamp='1304051415' post='507322'] So is this equation one that can just have multiple answers? Or is there one set answer...? [/quote] with definite terms, there is only one answer for this equation (it's 9). most people, as demonstrated by this thread, misconstrue the mnemonic "Please Excuse My Dear Aunt Sally" as 1. Parentheses 2. Exponents 3. Multiplication 4. Division 5. Addition 6. Subtraction However...and a big one at that....it's more accurately interpreted as: 1. Parentheses (and brackets) 2. Exponents (and roots [aka inverse exponents]) 3. Multiplication AND division (solved from left to right) 4. Addition AND subtraction (solved from left to right) Those that solve the equation in question with the former steps will arrive at an incorrect conclusion, proven by converting all symbols to exclusively multiplication or addition. Edited April 29, 2011 by Arcane 1 Link to comment Share on other sites More sharing options...
Arcane Posted April 29, 2011 Share Posted April 29, 2011 [quote name='rhineholt' timestamp='1304051750' post='507324'] [quote name='Arcane' timestamp='1304051429' post='507323'] [quote name='Dr. B' timestamp='1304048508' post='507309'] it's 1. as an expression it's not poorly written but as a calculator input it is.[u][b] the people who get 9 are the people who use calculators because they need them,[/b][/u] not to expedite arithmetic [/quote] actually, those who got 9 are the people [i][u]who are right[/u][/i] btw, i didn't use a calculator either. [/quote] Idk Jay, i was taught to not always trust calculators because calculators usually don't follow PEMDAS. [/quote] I'm not saying a calculator is right. I'm saying I am...strictly because I used PEDMAS (the Order of Operations) properly. Link to comment Share on other sites More sharing options...
rhineholt Posted April 29, 2011 Author Share Posted April 29, 2011 (edited) Okay, hang on. Let me through this out there. [url="http://oi52.tinypic.com/2qvvcrt.jpg"]http://oi52.tinypic.com/2qvvcrt.jpg[/url] That's the same equation, right? reason for edit: i didn't mean to say you were right. haha Edited April 29, 2011 by rhineholt Link to comment Share on other sites More sharing options...
Arcane Posted April 29, 2011 Share Posted April 29, 2011 [quote name='rhineholt' timestamp='1304052039' post='507327'] Okay, hang on. Let me through this out there. [url="http://oi52.tinypic.com/2qvvcrt.jpg"]http://oi52.tinypic.com/2qvvcrt.jpg[/url] That's the same equation, right? reason for edit: i didn't mean to say you were right. haha [/quote] it is, however you will notice that they added 4+2 before they completed the division...which is a no-no. Link to comment Share on other sites More sharing options...
rhineholt Posted April 29, 2011 Author Share Posted April 29, 2011 [quote name='Arcane' timestamp='1304052386' post='507330'] [quote name='rhineholt' timestamp='1304052039' post='507327'] Okay, hang on. Let me through this out there. [url="http://oi52.tinypic.com/2qvvcrt.jpg"]http://oi52.tinypic.com/2qvvcrt.jpg[/url] That's the same equation, right? reason for edit: i didn't mean to say you were right. haha [/quote] it is, however you will notice that they added 4+2 before they completed the division...which is a no-no. [/quote] Hmmm... okay. I can see how thats bad and wrong, but what if he were to do the things... I'm talkign to you in chat proving you wrong! Link to comment Share on other sites More sharing options...
snugz13 Posted April 29, 2011 Share Posted April 29, 2011 you do whats in the parenthesis first so (1+2) which equals 3 then you do multiplication which is 2 * 3 = 6 then division which is 6/6 = 1 according to the order of operations Link to comment Share on other sites More sharing options...
Arcane Posted April 29, 2011 Share Posted April 29, 2011 again, it's [size="7"]NOT[/size]multiplication then division. Link to comment Share on other sites More sharing options...
Chreees Posted April 29, 2011 Share Posted April 29, 2011 [quote name='Arcane' timestamp='1304051928' post='507325'] [quote name='rhineholt' timestamp='1304051415' post='507322'] So is this equation one that can just have multiple answers? Or is there one set answer...? [/quote] with definite terms, there is only one answer for this equation (it's 9). most people, as demonstrated by this thread, misconstrue the mnemonic "Please Excuse My Dear Aunt Sally" as 1. Parentheses 2. Exponents 3. Multiplication 4. Division 5. Addition 6. Subtraction However...and a big one at that....it's more accurately interpreted as: 1. [b]P[/b]arentheses (and brackets) 2. [b]E[/b]xponents (and roots [aka inverse exponents]) 3. [b]M[/b]ultiplication AND division (solved from left to right) 4. [b]A[/b]ddition AND subtraction (solved from left to right) Those that solve the equation in question with the former steps will arrive at an incorrect conclusion, proven by converting all symbols to exclusively multiplication or addition. [/quote] Please excuse my ass... I forgot about the order of operations. Fuck. I think Jayman's right... Link to comment Share on other sites More sharing options...
Chreees Posted April 29, 2011 Share Posted April 29, 2011 Yay, I'm a mod and can delete my vote and re-vote for 9! Link to comment Share on other sites More sharing options...
rhineholt Posted April 29, 2011 Author Share Posted April 29, 2011 [quote name='INCUBUSRATM' timestamp='1304056268' post='507339'] [quote name='Arcane' timestamp='1304051928' post='507325'] [quote name='rhineholt' timestamp='1304051415' post='507322'] So is this equation one that can just have multiple answers? Or is there one set answer...? [/quote] with definite terms, there is only one answer for this equation (it's 9). most people, as demonstrated by this thread, misconstrue the mnemonic "Please Excuse My Dear Aunt Sally" as 1. Parentheses 2. Exponents 3. Multiplication 4. Division 5. Addition 6. Subtraction However...and a big one at that....it's more accurately interpreted as: 1. [b]P[/b]arentheses (and brackets) 2. [b]E[/b]xponents (and roots [aka inverse exponents]) 3. [b]M[/b]ultiplication AND division (solved from left to right) 4. [b]A[/b]ddition AND subtraction (solved from left to right) Those that solve the equation in question with the former steps will arrive at an incorrect conclusion, proven by converting all symbols to exclusively multiplication or addition. [/quote] Please excuse my ass... I forgot about the order of operations. Fuck. I think Jayman's right... [/quote] He's not right!! I'll prove it someday. [quote name='INCUBUSRATM' timestamp='1304056435' post='507340'] Yay, I'm a mod and can delete my vote and re-vote for 9! [/quote] Can't everybody?! Or maybe I can just because I made the poll Link to comment Share on other sites More sharing options...
Chreees Posted April 29, 2011 Share Posted April 29, 2011 I dunno, maybe everyone can... I was just being silly. I didn't really vote. Link to comment Share on other sites More sharing options...
The Jester Posted April 29, 2011 Share Posted April 29, 2011 basic rules of math as I learned them you alway go from inside to outside an work yourself out so first you do the bracket since you have a 3 in the bracket you multiply first, then divide... only 1 is correct and ANY math teacher should tell you this Link to comment Share on other sites More sharing options...
Tyler Posted April 29, 2011 Share Posted April 29, 2011 Origonally I thought it was 9 then the more I looked at it, it can really be either depending on how you read it [b]6÷2(1+2)[/b] is technically the same as using 6 as a numerator and 2(1+2) as a denominator, which would yield 6/6 which is 1 however, you can also read it as six divided by two times the sum of one plus two, which is 9, since you would add 1+2, 3, then divide 6 by 2 which is 3, then multiply the answers. Link to comment Share on other sites More sharing options...
Travis Posted April 29, 2011 Share Posted April 29, 2011 69 Link to comment Share on other sites More sharing options...
The Jester Posted April 29, 2011 Share Posted April 29, 2011 @ Tyler It cant be either since there are rules how to work your way through math for it to be six divided by two times the sum of one plus two it would be written like this[b] [size="3"] (6:2)(1+2) [/size][/b][size="3"]+ multiply vs. division they go from left to right if: 2 x 3 : 4 x 5 you dont multiply first and divide later you go one after another the correct answer is 7.5, and it cant be 0.3 as your PEMDAS suggests ignore that and learn the rules [/size] Link to comment Share on other sites More sharing options...
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