6÷2（2+1）=？ - Page 21 - TennisForum.com
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## View Poll Results: ？

1. 40 26.85%
9. 99 66.44%
Hard to say. 8 5.37%
Voters: 149. You may not vote on this poll

 Jan 6th, 2013, 01:04 PM #301 Igorche 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. __________________ I love my hater he makes me feel greater My Tennis Tipping Profile
Jan 6th, 2013, 01:18 PM   #302
Pvt. Kovalenko
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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..

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 Jan 6th, 2013, 02:41 PM #303 Ksenia. The fire still burns.     Join Date: Jul 2006 Posts: 9,117 Re: 6÷2（2+1）=？ 9 Source: I'm a math major. __________________ Whatever you do now, the world still turns.
Jan 7th, 2013, 12:40 PM   #304
Olórin
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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 Start da Game 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? __________________ tsvetana pironkova's no.1 lover enlighten yourself...
 Jan 7th, 2013, 02:41 PM #306 Super Dave Senior Member     Join Date: Dec 2005 Posts: 30,135 Re: 6÷2（2+1）=？ __________________ Elena Baltacha 1983-2014
Jan 7th, 2013, 02:41 PM   #307
novichok
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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 Igorche 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 __________________ I love my hater he makes me feel greater My Tennis Tipping Profile
Jan 8th, 2013, 07:25 AM   #309
Start da Game
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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......
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enlighten yourself...

 Jan 8th, 2013, 08:33 AM #310 Igorche Senior Member     Join Date: Aug 2011 Location: Third house on the left Posts: 16,031 Re: 6÷2（2+1）=？ What? __________________ I love my hater he makes me feel greater My Tennis Tipping Profile
 Jan 8th, 2013, 11:03 AM #311 Adrian. 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??? __________________
 Jan 8th, 2013, 01:18 PM #312 esquímaux 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?? __________________ "誰も私を止める停が出来なかったか"- Jinpachi Mishima- Jedah Douma"恐れてはいけない. 私は最初であり, 最後である"
 Jan 8th, 2013, 02:15 PM #313 Salve 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
Super Dave
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Re: 6÷2（2+1）=？

Quote:
 Originally Posted by Salve 9. Source: Im the smartest bitch on this Forum.
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 Jan 8th, 2013, 02:38 PM #315 PimpMePova 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