View Poll Results: ？

1.


40 
26.85% 
9.


99 
66.44% 
Others.(Please specify.)


2 
1.34% 
Hard to say.


8 
5.37% 
Voters: 149. You may not vote on this poll 


Jan 6th, 2013, 01:04 PM

#301

Senior Member
Join Date: Aug 2011
Location: Third house on the left
Posts: 16,031

Re: 6÷2（2+1）=？
The basic rule for multiplication and division are:
Multiplication and division have the same priority
 Addition and subtraction have the same priority
 Multiplication and division have higher priority than the addition and subtraction
 Operations of the same priority are implemented from left to right if there is no brackets to change the priority
and that's the only rule I accept.
By these rules we have:
6:2·(2+1)= 6:2·3=3·3=9
Problem appeared because the obelus ÷. The obelus, the name for the symbol denoting “÷”, is argued by some to represent the division of all terms preceding it by all terms after it. The obelus supposedly separates the two components of the fraction, with the top dot representing the numerator and the bottom dot representing the denominator.
So they count like this:
(6)/(2·(2+1))=6/6=1
But ISO states that the obelus should not be used.
So the answer is 9.



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Jan 6th, 2013, 01:18 PM

#302

Senior Member
Join Date: Dec 2011
Location: Borderlands
Posts: 1,796

Re: 6÷2（2+1）=？
Quote:
Originally Posted by Igorche
The basic rule for multiplication and division are:
Multiplication and division have the same priority
 Addition and subtraction have the same priority
 Multiplication and division have higher priority than the addition and subtraction
 Operations of the same priority are implemented from left to right if there is no brackets to change the priority
and that's the only rule I accept.
By these rules we have:
6:2·(2+1)= 6:2·3=3·3=9
Problem appeared because the obelus ÷. The obelus, the name for the symbol denoting “÷”, is argued by some to represent the division of all terms preceding it by all terms after it. The obelus supposedly separates the two components of the fraction, with the top dot representing the numerator and the bottom dot representing the denominator.
So they count like this:
(6)/(2·(2+1))=6/6=1
But ISO states that the obelus should not be used.
So the answer is 9.

Case closed..
Moderators, send this thread to oblivion, please??
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Jan 6th, 2013, 02:41 PM

#303

The fire still burns.
Join Date: Jul 2006
Posts: 9,117

Re: 6÷2（2+1）=？
9
Source: I'm a math major.
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Jan 7th, 2013, 12:40 PM

#304

Senior Member
Join Date: Apr 2007
Posts: 13,014

Re: 6÷2（2+1）=？
How many times does this need to be explained. We all know it's 9. Some people are explaining it in such a convoluted way, talking about the "intent" of the author/questioner  seriously? :
It's pretty rudimentary in the UK to be able to solve equations like this while at school. If you wrote 1 as your answer you would get the question wrong and lose the mark.
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Jan 7th, 2013, 02:29 PM

#305

Senior Member
Join Date: Jan 2010
Location: pirru's heart
Posts: 4,123

Re: 6÷2（2+1）=？
i have a doubt.....i mean seriously......which is greater quantity 2 or 2? everyone will say 2.....
now when we divide a number(say 100) with the greater number(2), the resulting number should be less than that of what we get when we divide the same number(100) with the lesser number(2), no?
then why do we get 50 in the first case when diving by the greater quantity(2) and 50 in the second case when dividing by lesser quantity 2?



Jan 7th, 2013, 02:41 PM

#306

Senior Member
Join Date: Dec 2005
Posts: 30,135

Re: 6÷2（2+1）=？
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Jan 7th, 2013, 02:41 PM

#307

Senior Member
Join Date: Jan 2011
Posts: 11,637

Re: 6÷2（2+1）=？
Quote:
Originally Posted by Start da Game
i have a doubt.....i mean seriously......which is greater quantity 2 or 2? everyone will say 2.....
now when we divide a number(say 100) with the greater number(2), the resulting number should be less than that of what we get when we divide the same number(100) with the lesser number(2), no?
then why do we get 50 in the first case when diving by the greater quantity(2) and 50 in the second case when dividing by lesser quantity 2?




Jan 7th, 2013, 02:58 PM

#308

Senior Member
Join Date: Aug 2011
Location: Third house on the left
Posts: 16,031

Re: 6÷2（2+1）=？
Because the function y=1/x have break in 0.
And here is the graphic function 1/x



Jan 8th, 2013, 07:25 AM

#309

Senior Member
Join Date: Jan 2010
Location: pirru's heart
Posts: 4,123

Re: 6÷2（2+1）=？
Quote:
Originally Posted by Igorche
Because the function y=1/x have break in 0.
And here is the graphic function 1/x

then don't treat 2 smaller than +2......2 is messing with +100 and devaluing it far better than +2......



Jan 8th, 2013, 08:33 AM

#310

Senior Member
Join Date: Aug 2011
Location: Third house on the left
Posts: 16,031

Re: 6÷2（2+1）=？
What?



Jan 8th, 2013, 11:03 AM

#311

Let's have a kiki!
Join Date: Jan 2008
Location: Dahoam
Posts: 94,247

Re: 6÷2（2+1）=？
I have 9 as well and then I realizied this thread has already 21 pages
whhhhhhhhhhhhhhyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy???
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Jan 8th, 2013, 01:18 PM

#312

Team WTAworldSenior Member
Join Date: Jan 2003
Location: 釜を掘&
Posts: 15,293

Re: 6÷2（2+1）=？
Please excuse my dear aunt Sally??
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Jan 8th, 2013, 02:15 PM

#313

Senior Member
Join Date: Nov 2008
Posts: 5,974

Re: 6÷2（2+1）=？
9.
Source: Im the smartest bitch on this Forum.



Jan 8th, 2013, 02:33 PM

#314

Senior Member
Join Date: Dec 2005
Posts: 30,135

Re: 6÷2（2+1）=？
Quote:
Originally Posted by Salve
9.
Source: Im the smartest bitch on this Forum.

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Elena Baltacha 19832014



Jan 8th, 2013, 02:38 PM

#315

Senior Member
Join Date: Sep 2012
Posts: 2,296

Re: 6÷2（2+1）=？
it's nine but I don't understand what's the point of this thread nor why there'd be 21 pages of this ...and with my post I'm increasing it





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