6÷2(1+2)=?

but he is also from canada...

 

See, it's interesting that you point this out, and that there's apparently a debate.

I got 1, as I was taught that you don't do standard left to right math until there are NO parentheses left. Meaning, 1+2=3, times 2 to get rid of parentheses, equals 6. 6/6 is 1.

 

Yes.

 

I'm going to be honest and say that the first time I did this, I got a 1.

 

google says it's 9...

 

I read it as 6 over everything else, meaning I'd get one. Unless there's something inherently different about using that division sign instead of a /, and I'm not aware that there is.

 

I say the answer is one.

 

My vote is for one as well. The idea to multiply until there's no parentheses makes sense.

 

I say 9.

6÷2(1+2) =
6÷2*(3) =
3*3 = 9

 

not mathematically, it doesn't

the mathematical operation (multiplication) is outside the parentheses, not inside.

 

It's really funny that this thread got past the first page...

By funny I mean sad.

 

at least people are learning =)

 

learning how to stop the flow of blood in your arteries is more interesting though

 

Fair enough..

If everyone just used a lot of parentheses all the time it would be much easier.

6/(2(1+2)) or (6/2)(1+2) Even though P E MD AS works out to be 9.

It seems kind of like the commas in English.

The panda eats, shoots, and leaves. vs The panda eats shoots and leaves. >.>

 

At first I got 1, but after thinking about it, I see that 9 makes sense. In math, parentheses denote a single unit, so in this case, you have three units in the expression: 6, 2, and (1+2). Because of the nature of the order of operations, you begin solving the expression by combining the 1 and the 2 in the parenthesis to give you 3, leaving you with 6, 2, and 3. At this point, the parentheses are only denoting multiplication, not precedence in the order of operations. So you are essentially left with 6 divided by 2 multiplied by 3, which you would work left to right to result in 9: 6/2= 3; 3*3=9.

Another way to consider this is to express it in word form: 6 divided by 2 multiplied by the quantity "1 plus 2." Again, you solve for the quantity, resulting in: 6 divided by 2 multiplied by 3. Written this way, there can be no doubt that the solution is 9.

 

I learned something about this thread - people (including me) tend not to read earlier debates and arguments before posting their answers.

If everybody read the earlier debate, much of the later posts were really unnecessary. In summary:

1) there is a debate going around on the ranking of multiplication by juxtaposition, those who think that it should rank higher than normal multiplication would get 1, those who don't would get 9. It has less to do with 'left to right' or 'getting rid of parentheses'.

2) An engineer has made a testimony that his industry standards tend to reject the idea that multiplication by juxtaposition should get a higher ranking, and would see 9 as the answer.

And if my theory works, this thread would go for another few pages with this post ignored. Well, this is also a lesson for me to not just skip all prior debate on an issue before voicing my opinion.

 

who cares, maths is like so yesterday!

 

Lol 9

 

6/2(1+2)

6/2(3)

6/6

1

I don't see how you can get 9

---------- Post added 8th May 2011 at 10:00 AM ----------

Oh lmfao.
panda with an AK47 anyone?