Math: 6÷2(1+2) = ?

Hey, I have shown scientific calculator doing the problem and many other websites and programs doing the problem.

All getting 9.

Have you shown anything showing an answer of 1?

[link to imageshack.us]
[link to img255.imageshack.us]
[link to vimeo.com (secure)]

Everyone of these websites I typed the equation EXACTLY as the OP had it. Using ÷ not /,x or adding anything after the first 2.

Last Edited by Forgotten on 01/21/2013 11:42 AM

It is a scientific calculator. Do you want me to turn it landscape so you can see the whole screen with all the scientific annotations/buttons. I can take a quick pic, but it would only serve to make you look more foolish.

I was hoping you were going to say that. That is why I took it "portrait" not landscape. So you would use "scientific calculator"rebuttal, and I could post a pic showing it is scientific.

Last Edited by Forgotten on 01/21/2013 11:44 AM

Are you serious? Scientific calculators knows the difference between a typed n*(x) and n(x)



.

i get 9 but thats just in my head.

6÷2(1+2)
= 6/2(3) <- at this stage the parenthesis represent multiplication, not order of ops
= 3(3)
= 9

Last Edited by Anubis on 01/21/2013 11:51 AM

Yes they do. There is no difference on those too.

[link to img339.imageshack.us]


See the scientific calculator symbols.

I posted a video and did everything you asked me too.


I have proven my part.

Last Edited by Forgotten on 01/21/2013 11:51 AM

And + real scientific calculators solve equations with x


Stop to use such a toys to do the stuff.



.

I have shown scientific calculator doing the problem and many other websites and programs doing the problem.

All getting 9.

Have you shown anything showing an answer of 1?

[link to imageshack.us]
[link to img255.imageshack.us]
[link to vimeo.com (secure)]
[link to img339.imageshack.us]

Everyone of these websites I typed the equation EXACTLY as the OP had it. Using ÷ not /,x or adding anything after the first 2.

6÷2(3) = 6÷2*3 = 6/2*3= 6÷2*(3)= 9

Last Edited by Forgotten on 01/21/2013 11:55 AM

Again?

No rebuttal? No more arguments? Just pictures.

Why are all these tools giving the wrong answer?

Occams Razor. Is it more likely every single thing used comes up with 9 and is wrong?

Or more likely the answer is 9, and these tools/programs are correct. And that human error is leading to the answer of 1?

6÷2(3) = 6÷2*3 = 6/2*3= 6÷2*(3)= 9

Last Edited by Forgotten on 01/21/2013 12:03 PM

So who is the tard here? TELL ME



.

Witty, concise, and well spoken. I would say we both are, as much time as we are spending on this.

=)

What's the difference?

There isnt one.



6÷2(3) = 6÷2*3 = 6/2*3= 6÷2*(3)= 9

Last Edited by Forgotten on 01/21/2013 12:10 PM

According to my calculator there is. According to the rules of math, there is not. I go with the rules of math.

A given

#(

Number to left

Multiply


1 + 3(3-2) = ?

1 + 3 (1) = ?

4 • 1 = 4

Multiplication

3 ways

9 * =

9 x =

9(x)=

133 pages for a simple equation.
its still 9. i cant see how anyone can argue that.

Yep.

[link to imageshack.us]
[link to img255.imageshack.us]

Video Below on Scientific calculator.
[link to vimeo.com (secure)]
[link to img339.imageshack.us]



6÷2(3) = 6÷2*3 = 6/2*3= 6÷2*(3)= 9

I used to think like you. The answer is 1. Caper_26 can explain it well. I hope he just starts a thread and gives the several proofs.

The main issue here, is that working from left to right is not part of the order of operations. Problems do not have to be worked left to right, because it shouldn't matter.

And given that the obelus is really a grouping symbol, creating a dividend and a divisor. You always work a dividend and a divisor separately. And you can prove that with the identity property a/1a=1

They both equal 1. From what I have learned researching this, the obelus and slash are equivalent.

i still get 9

6÷2(1+2)
= 6/2(3) <- at this stage the parenthesis represent multiplication, not order of ops
= 3(3)
= 9

tell me what you think im doing wrong?

This, those are the same thing op.

Going left to right is part of the order of operations.

P Parentheses first
E Exponents (ie Powers and Square Roots, etc.)
MD Multiplication and Division (left-to-right)
AS Addition and Subtraction (left-to-right)

Divide and Multiply rank equally (and go left to right).

Add and Subtract rank equally (and go left to right)

[link to www.mathsisfun.com]

You do multiplication and division left to right:
6 divided by the quantity 2n
6 ÷ 2n , where n = 2+1
6 ÷ 2n = 3/n; n = 2+1
3/n = 3/(2+1) = 1

OR:

6 ÷ 2(2+1) = 6 ÷ (2(2)+2(1)) = 6 ÷(4+2) = 1

6 ÷ 2(2+1) = 1
6 ÷ (2+1)2 = 1

(6 ÷ 2)(2+1) = [(6÷2)(2) + (6÷2)1)] = [6 + 3] = 9
6(2+1) ÷ 2 = 9

WHY ???
Derive the equations showing all steps. Do not introduce unnecessary ( ) or *
6 ÷ 6 = 1
6 ÷ (4+2) = 1; Factor out the GCF (Greatest common factor of 2)
6 ÷ 2(2+1) = 1


Now for 9:
3 * 3 = 9
3 * (2+1) = 9
6/2 * (2+1) = 9

OR:
6 + 3 = 9
(6/2)2 + (6/2)1 = 9
(6/2)(2+1) = 9

Fractions as coefficients that use '/' , such as (6/2)n, must use parentheses. Otherwise, it is 6/2n which is 6/(2n).

Technically no, but it gives young students a sense of order. Adding and multiplying is associative, so it doesn't matter what order you them in. Subtracting and division are the same as adding and multiplying. It is knowing things like this, as well as other details of maths, that allow you to see that this equation is solved as 1.

[link to math.berkeley.edu]

Read that.

BZZZZZZZZZZZZZZZZZ ! WRONG! That is why you get 9. There IS a difference.

Solve a ÷ 1a

if it makes no difference whatsoever in what order the operations are carried out, then WHY are some people saying "1" and some people saying "9"?

Maybe they just use google and wikipedia? I know, thats the new generation... >>>>> [link to www.godlikeproductions.com]


.

Last Edited by DVCMCM on 01/21/2013 07:07 PM