Mathematicians - Page 4 - SV650.org

12-10-11, 11:35 PM

Quote:

Originally Posted by thulfi

eh?

At no point in the op does it show a 'X' ( multiply) in the equation !!
I might be missing something but 28? No one else got any part of it to be 28 lol

12-10-11, 11:35 PM

Quote:

Originally Posted by specialone

Can you not see there is two ways to write the equation?

4+6/2
4+3 (6/2)

I don't understand this. Either way, this is not about arranging equations. This is about doing the calculations in the sum in the correct mathematical order, which as people have mentioned is 'bodmas'.

12-10-11, 11:37 PM

Quote:

Originally Posted by specialone

At no point in the op does it show a 'X' in the equation !!
I might be missing something but 28? No one else got any part of it to be 28 lol

My example had nothing to do with the op's equation. It was an example to those who put 5 down, as to why the answer in the op's sum is 7. It was a different sum I invented to illustrate that you must multiply/divide before adding/subtracting.

http://en.wikipedia.org/wiki/BODMAS

12-10-11, 11:43 PM

You can't just go round inventing new equations, that's not maths.

I correctly put 7 like I said but I can see both.

12-10-11, 11:44 PM

Quote:

Originally Posted by specialone

You can't just go round inventing new equations, that's not maths.

I correctly put 7 like I said but I can see both.

Inventing new equations? You've lost me mate.

And there is no both. There is only 7.

12-10-11, 11:46 PM

Quote:

Originally Posted by thulfi

Inventing new equations? You've lost me mate.

And there is no both. There is only 7.

Sorry dude, taking the p1ss

timwilky · 13-10-11, 06:16 AM

As others have said there is an order of precedence which applies.

In the OP equation, (7-3)+6÷2.

the divisor has precedence over the "+", therefore the equation reads (7-3) + (6÷2) =7

13-10-11, 06:48 AM

Bidmas, the answer is 7

MisterTommyH · 13-10-11, 07:39 AM

Ha ha,

I just asked another engineer at work and he said 5. When I pointed out bodmas the excuse was that the question was ambiguous and that the last bit should be it brackets.

I see what he's saying, but it doesn't HAVE to be in brackets, that's just another way to write it if you choose.

flymo · 13-10-11, 08:43 AM

Quote:

Originally Posted by Tommy H

Ha ha,

I just asked another engineer at work and he said 5. When I pointed out bodmas the excuse was that the question was ambiguous and that the last bit should be it brackets.

I see what he's saying, but it doesn't HAVE to be in brackets, that's just another way to write it if you choose.

Its only ambiguous if you aren't aware of the mathematical precedence that needs to be applied.

If you really want to blow your mind, open up the calculator app in Windows and try 1+2x3= See what you get in 'standard mode' view and try the same sum in 'scientific mode'.

The correct answer is 7, not 9 as displayed by lower quality calculators that don't apply the correct operator precedence.

View Poll Results: (7-3)+6÷2=
5	52	54.17%
7	44	45.83%
no idea	0	0%
Voters: 96. You may not vote on this poll

12-10-11, 11:43 PM	#34
Specialone Guest Posts: n/a	Re: Mathematicians You can't just go round inventing new equations, that's not maths. I correctly put 7 like I said but I can see both.

13-10-11, 06:16 AM	#37
timwilky Member Mega Poster Join Date: Mar 2004 Location: Not in Yorkshire. (Thank God) Posts: 4,116	Re: Mathematicians As others have said there is an order of precedence which applies. In the OP equation, (7-3)+6÷2. the divisor has precedence over the "+", therefore the equation reads (7-3) + (6÷2) =7 __________________ Not Grumpy, opinionated. Last edited by timwilky; 13-10-11 at 06:19 AM.

13-10-11, 06:48 AM	#38
kellyjo Guest Posts: n/a	Re: Mathematicians Bidmas, the answer is 7

13-10-11, 07:39 AM	#39
MisterTommyH Member Join Date: Jul 2010 Location: West Mids Posts: 854	Re: Mathematicians Ha ha, I just asked another engineer at work and he said 5. When I pointed out bodmas the excuse was that the question was ambiguous and that the last bit should be it brackets. I see what he's saying, but it doesn't HAVE to be in brackets, that's just another way to write it if you choose.