Author Topic: 5+6x14=  (Read 1751 times)

Offline Capten_C

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5+6x14=
« on: 20-07-2014, 22:07:17 »
Right what the hell I'll make a mathematical arse of myself!  :D

Now I could do Trig pretty well, but most maths I was in 2 short planks class!  :D

So this woman on a shopping channel just now was showcasing a new smartphone. Then she showed the Calculator app and inputted 5+6x14 and the answer was 89.

Mmm, is that right? I thought. So in my head I do a rough one....  5+6 well that's 11, then x14...by gum that's about errrr well 154!

So I get out my Samsung and do the same 5+6x14 and hey presto 89!  ::) :-\

So now I do it on the Win7 Calculator thing, 5+6 (it automatically says 11 before you input the x14) and it's 154 on that!

Some trickery going on here! Simple explanation for a simple fellow plz Einsteins!!

LEGENDARY FORGOTTEN HOPE 2 ROUNDS!!! >> https://www.youtube.com/watch?v=2xtJF9fL1YI

Offline Ts4EVER

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Re: 5+6x14=
« Reply #1 on: 20-07-2014, 22:07:42 »
You have to multiply first. So it is 6x14 = 84 + 5 = 89

Offline siben

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Re: 5+6x14=
« Reply #2 on: 20-07-2014, 22:07:55 »
5+6x14=5+(6x14)=5+(60+24)=5+84=89

Multiply or divide fist. then add or subtract.

Offline Slayer

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Re: 5+6x14=
« Reply #3 on: 20-07-2014, 23:07:06 »
FH2 forums: even for your most comlpicated mathematical problems





;)

Offline Capten_C

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Re: 5+6x14=
« Reply #4 on: 20-07-2014, 23:07:34 »
Ah ok interesting thanks guys!  :)  Strange how the Phone/PC calculate different answers though?
LEGENDARY FORGOTTEN HOPE 2 ROUNDS!!! >> https://www.youtube.com/watch?v=2xtJF9fL1YI

Offline Slayer

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Re: 5+6x14=
« Reply #5 on: 20-07-2014, 23:07:20 »
The PC calculates on the move, which is a dumb thing to do, because like psoted before: you need to multiply first, then divide, then add, then subtract. When the PC doesn't know you are gonna add more stuff to the calculation, it will go wrong, like in your example.

To circumvent this, you should add the multiplier first to the PC calculator, so: 6x14, then +5.

Offline Capten_C

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Re: 5+6x14=
« Reply #6 on: 20-07-2014, 23:07:14 »
Got it! http://www.mathsisfun.com/operation-order-pemdas.html  ;D

Well well well well well well well well well, well!  ;)

Quote
You need to set the PC calculator to "scientific", then it does it correctly
Done! Thanks.
« Last Edit: 20-07-2014, 23:07:35 by Capten_C »
LEGENDARY FORGOTTEN HOPE 2 ROUNDS!!! >> https://www.youtube.com/watch?v=2xtJF9fL1YI

Offline Kradovech

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Re: 5+6x14=
« Reply #7 on: 20-07-2014, 23:07:20 »
You need to set the PC calculator to "scientific", then it does it correctly

Offline Matthew_Baker

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Re: 5+6x14=
« Reply #8 on: 21-07-2014, 00:07:43 »
Yup PEMDAS says the answer will be 89; and that's the practical way of doing math for most of the world.

On the subject of PEMDAS;
https://www.youtube.com/watch?v=y9h1oqv21Vs
this is a pretty cool video that discusses simple math and the theories behind the order of operations and why they're there.

and then just for funzies I wanna link this video for people who are clicking on a math thread that enjoy math. (also you should subscribe to their channel (numberphile) it's interesting ;D)
https://www.youtube.com/watch?v=PCu_BNNI5x4
It's not about Order of Operations but it's an ok example as to why the order of operations can't always help you with everything in math. Like infinite sums. then it goes into a bunch of other pretty interesting stuff. 8)

 

Offline Captain Pyjama Shark

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Re: 5+6x14=
« Reply #9 on: 21-07-2014, 05:07:09 »
please excuse my dear aunt sally

Offline Zoologic

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Re: 5+6x14=
« Reply #10 on: 21-07-2014, 16:07:26 »
There is chain order, there is scientific order.

Chain order (that resulted in 154) is used mostly by Finance calculator. While everything else (including scientific formula) use the scientific order.

Offline Khaine

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Re: 5+6x14=
« Reply #11 on: 23-07-2014, 15:07:52 »
Brackets work too : 5 + (6*14) = 89

Offline Lightning

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Re: 5+6x14=
« Reply #12 on: 23-07-2014, 18:07:59 »
So, I looked it up and in The Netherlands you learn this in school when you're 10 years old...

Offline THeTA0123

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Re: 5+6x14=
« Reply #13 on: 23-07-2014, 18:07:07 »
https://www.youtube.com/watch?v=gENVB6tjq_M

I always miserably failed math.. only simple things were possible for me. Is it something that is malfunctioning in my brain, or is it because i just dont like it?
-i am fairly sure that if they took porn off the internet, there would only be one website left and it would be called bring back the porn "Perry cox, Scrubs.

Biiviz

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Re: 5+6x14=
« Reply #14 on: 23-07-2014, 19:07:48 »
You need to set the PC calculator to "scientific", then it does it correctly

As opposed to its standard "idiot" setting?