6÷2(1+2)  TOPIC_SOLVED

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6÷2(1+2)

Postby deadsightsx on Sat Jun 15, 2013 6:24 am

I wasn't quite sure where to post this, this just seemed the best place to start. I'm sure some of you have seen the problem 6÷2(1+2) on facebook, and most the people get either 1 or 9. Who is right and who is wrong? I believe it is 9, but after doing it a few other ways, i got 1 and just wanted to make sure im not OVER thinking it.
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Re: 6÷2(1+2)  TOPIC_SOLVED

Postby maggiemagnet on Sat Jun 15, 2013 12:14 pm

deadsightsx wrote:I'm sure some of you have seen the problem 6÷2(1+2) on facebook, and most the people get either 1 or 9. Who is right and who is wrong?

The last example on this page explains why there is (for the moment anyway) not a "right" answer to this. :lol:
:clap:
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Re: 6÷2(1+2)

Postby deadsightsx on Sat Jun 15, 2013 4:47 pm

No the answer is definitely 9, the example you posted is incorrect.

It's simply incorrect. If it were correct, then 2X² would really mean (2 × X)²=2² × X²=4 × X², but it doesn't; it means 2 × X².
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Re: 6÷2(1+2)

Postby jg.allinsymbols on Sun Jun 16, 2013 7:06 am

maggiemagnet wrote:
deadsightsx wrote:I'm sure some of you have seen the problem 6÷2(1+2) on facebook, and most the people get either 1 or 9. Who is right and who is wrong?

The last example on this page explains why there is (for the moment anyway) not a "right" answer to this. :lol:
:clap:


That example indicates to do multiplications before divisions. That being the rule, the steps will be
6 div.by 2(1+2)
6 div.by 2(3)
6 div.by 6
6/6=1
1

You can state clear control of how you want to express numbers combined in operations through grouping symbols, or parentheses.
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Re: 6÷2(1+2)

Postby jermy on Mon Jun 24, 2013 7:24 am

Hi,

At first u have to apply the PEMDAS rule ,and according to that the Parentheses comes first

Step:1- 1+2=3

so the expression is now 6/2*3

As the precedence of the division and multiplication are same so we will do the operation from left to right so first we ll do division

step:-2- 6/2=3

so the remaining expression is 3*3

step:-3 3*3 = 9
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Re: 6÷2(1+2)

Postby Damien23 on Thu Jul 24, 2014 5:14 am

Follow the rules of and order of BODMAS - Brackets, Of, Division, Multiplication, Addition, Subtraction - in this order and you'll probably never go wrong.
So, here goes, following the above order scheme:
Brackets first => 1+2=3
There is no 'of', so we skip that
Now comes division, so 6 divided by 2, which is equal to 3.
No multiplication, addition (already solved in the beginning since brackets need to be solved first) and subtraction so we skip these three.
Finally, what we're left with is 3 multiplied by 3 which is equal to 9.
So there!
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Re: 6÷2(1+2)

Postby anawilliam on Thu Jul 24, 2014 5:18 am

Good advice by all experts here thanks for it.
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