48÷2(9+3)

[ST]

Originally Posted by Racecraft

B rackets
O f
M ultiplication
D ivision
A dd
S ubract

Type BOMDAS into google and see what happens. You have the correct answer but you've used the incorrect formula to obtain it.

I've noticed everyone who has come up with 2 has put an invisible set of brackets around 2, isolating 48 from the rest of the equation. This is wrong. As others have stated; you work from left to right.

[My32Doors]

Answer as written is 288.
If it were written 48/(2(9+3)) answer is 2

[Racecraft]

Originally Posted by ST

Type BOMDAS into google and see what happens. You have the correct answer but you've used the incorrect formula to obtain it.

I've noticed everyone who has come up with 2 has put an invisible set of brackets around 2, isolating 48 from the rest of the equation. This is wrong. As others have stated; you work from left to right.

what formula, it is how I was taught... google won't make me feel any better

[NC1183]

Originally Posted by Iggypoppin'

I still don't understand how people are missing the 24x12 part...

Because you are making an extra equation. The 48 is divided by the product of (9+3)x2 ie 24, therefore the resultant is 2

[ST]

Sorry I should have said method. It is BODMAS.

[Iggypoppin']

It's not an extra equation, I am breaking one equation into
two(as stipulated by the brackets).

[Racecraft]

BOMDAS etc aside... once the 'bracketed' sum is done shouldn't you just work from L--->R

ie:-
48/2 (9+3)
48/2 *12
24*12
288

?????????

[ST]

Yes exactly, I thought you were using BOMDAS in literal sequence like a few others in thread have done. Glad to see we are on the same page.

[NC1183]

Originally Posted by Iggypoppin'

It's not an extra equation, I am breaking one equation into
two(as stipulated by the brackets).

Originally Posted by Racecraft

BOMDAS etc aside... once the 'bracketed' sum is done shouldn't you just work from L--->R

ie:-
48/2 (9+3)
48/2 *12
24*12
288

?????????

Which is were I think it is wrong. based on my teachings.

Yes, work the brackets out - (9 + 3) = 12,
you then get 48 / 2*12
results in 48 / 24
equalling 2

[Iggypoppin']

Disregard.
It's one of "those" equations. Really irritating and whilst not specifically hard to
solve, it's a pain when two people have an answer and disagree.
Still, 48/2 is 24(do this first) then of course 24(12) is 288. Bam I am SO right

[SEZ213]

Originally Posted by NC1183

Which is were I think it is wrong. based on my teachings.

Yes, work the brackets out - (9 + 3) = 12,
you then get 48 / 2*12
results in 48 / 24
equalling 2

You're good up until the second part...you're working right to left, you need to work left to right.

[kenz]

well doesn't everyone just think they're experts

[Adamz Ghia]

It's really not hard, 24x12=288.

[SLO AU XR8]

2(9+3) = 24

48/24 = 2

[Racecraft]

Originally Posted by NC1183

Which is were I think it is wrong. based on my teachings.

Yes, work the brackets out - (9 + 3) = 12,
you then get 48 / 2*12
results in 48 / 24
equalling 2

Yes....but nah

It should be

B
O
MD
AS

'* and /' or '+ or -' are 'equal' and performed left to right

[NC1183]

Originally Posted by Sezzy

You're good up until the second part...you're working right to left, you need to work left to right.

If i was working right to left i would end up with .5

[Racecraft]

Originally Posted by NC1183

If i was working right to left i would end up with .5

but multiply and divide ( same as plus and minus) are equal.... so after the brackets, any expontents etc you revert to left to right

[Stefan]

notating 2(9+3) is the same as notating (2(9+3))

so therefore

48÷2(9+3) is the same as 48÷(2(9+3))

Brackts first the answer is 2.....who ever thinks it is 288 is WRONG

I'm a Mathematics Lecturer so believe me.

[kenz]

since there is no sign between the 2 and the (9+3) when the turns into 12 it cant just be 2 12 can it?.... so it is 2(12) and you would need to do that first to get rid of the bracket completely rather than dividing the 48 in half first

[351@GT]

extra brackets dont need to be there. the 2 is only applicable to whats inside the bracket and is a small equation on its own.


Rule 5 : Brackets :

(a) A number immediatly outside a bracket means that everything inside the bracket gets multiplied by that number


everything i learnt through calc, g&t etc was as nc1183 is saying =\


"
Originally Posted by NC1183
Which is were I think it is wrong. based on my teachings.

Yes, work the brackets out - (9 + 3) = 12,
you then get 48 / 2*12
results in 48 / 24
equalling 2


Originally Posted by Racecraft
Yes....but nah

It should be

B
O
MD
AS

'* and /' or '+ or -' are 'equal' and performed left to right"

the true sense of boMdas gives you 2 ..... =\

[Racecraft]

Originally Posted by Stefan

notating 2(9+3) is the same as notating (2(9+3))

so therefore

48÷2(9+3) is the same as 48÷(2(9+3))

Brackts first the answer is 2.....who ever thinks it is 288 is WRONG

I'm a Mathematics Lecturer so believe me.

an expert has spoken I'm out with the self pro-claimed glory that I was right too

[Iggypoppin']

Originally Posted by Stefan

notating 2(9+3) is the same as notating (2(9+3))

so therefore

48÷2(9+3) is the same as 48÷(2(9+3))

Brackts first the answer is 2.....who ever thinks it is 288 is WRONG

I'm a Mathematics Lecturer so believe me.

I do* believe you










*do not.

[ST]

Originally Posted by Stefan

notating 2(9+3) is the same as notating (2(9+3)).

Yes but 48/2(9+3) is NOT the same as 48/(2(9+3)), surely a mathematics lecturer would not make such an amateur mistake?

[Adamz Ghia]

Originally Posted by Stefan

notating 2(9+3) is the same as notating (2(9+3))

so therefore

48÷2(9+3) is the same as 48÷(2(9+3))

Brackts first the answer is 2.....who ever thinks it is 288 is WRONG

I'm a Mathematics Lecturer so believe me.

My three graphics calculators, laptop, phone, scientific calculator and most importantly, my 14 yeaar old brother says the maths lecturer is wrong... answer is 288...

[jonesyedxr6]

The brackets are gone the moment you do the 9 + 3.

you are then left with 48 ÷ 2 x 12

..order of operations states left to right.

Originally Posted by Stefan

notating 2(9+3) is the same as notating (2(9+3))

so therefore

48÷2(9+3) is the same as 48÷(2(9+3))

Brackts first the answer is 2.....who ever thinks it is 288 is WRONG

I'm a Mathematics Lecturer so believe me.

...my dads a maths B teacher and he says although its a very ambiguous question, from the way its written, then answer is 288.

I'm a third year mech engineering post grad, but that has nothing to do with it, i would have had the exact same answer in grade 11 as i do now.


288.

BAM!

[Racecraft]

give Stefan a right of reply... imho has has over thought his answer and is seeing something that is not there ...............

[SEZ213]

Originally Posted by Stefan

notating 2(9+3) is the same as notating (2(9+3))

so therefore

48÷2(9+3) is the same as 48÷(2(9+3))

Brackts first the answer is 2.....who ever thinks it is 288 is WRONG

I'm a Mathematics Lecturer so believe me.

How is that logical, let alone right?

[kenz]

Originally Posted by jonesyedxr6

The brackets are gone the moment you do the 9 + 3.

you are then left with 48 ÷ 2 x 12

..order of operations states left to right.

not what I was taught. You can't just add in your own sign, it would be 48÷2(12)

[NC1183]

Originally Posted by ST

Yes but 48/2(9+3) is NOT the same as 48/(2(9+3)), surely a mathematics lecturer would not make such an amateur mistake?

Why is it then, that my calculator, no matter which way i enter it, either 48/2*(9+3) or 48/(2(9+3)) still equals 2.

[jonesyedxr6]

Originally Posted by kenz

not what I was taught. You can't just add in your own sign, it would be 48÷2(12)

The multiply sign was there from the start, i didn't pull it out of my rear