48÷2 (9+3) argument

48 / 2 (9+3) =2

I get 2 as you need to keep in mind that calculators do not always understand theorems or properties. Google gives me 288 but my gcalc gives me 2 which was also my answer on paper.
We need to use simplifying using the distributive property and 2(9+3) simplified is 24 or (2*9+2*3) and thus we have 48/(2*9+2*3)

** Redid my high school math at UNISA two years back.
 
R1ECKO said:
cbrunsdonza to get 288 ull use x but for 2 its without the x, yes
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You need to apply either the BODMAS rule or the distributive property rule. Now the BODMAS rule is the most common approach and its say (B) Brackets first. Thus the brackets are 2(9+3) and not (9+3). Just remember if no number is in front of the bracket we can say it multiplied by one. So (1+1) is actually 1(1+1). The most important thing to keep in mind is how this problem is presented

Also if I do a distributive property example I can reverse : 2*18 to become 2*2(9) but its not 2*2*(9) as that is actually 2*2*1(9)
 
R1ECKO said:
there is BRACKETS which means X, so why would there be 2 "TIMES"

48÷2"x"(9+3)
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That is the beauty of maths.
48÷2 (9+3)

Lets read that out aloud:

Forty-eight divided by Two
Multiplied by
Nine plus Three

See?
 
I'm reading some other forums on the application of the BODMAS rule to this problem and its interesting that their is no majority agreement in the forum world even on how to apply the BODMAS rule here. Since I would rather go and play some BFBC2 tonight than try and argue my answer, I would conclude that it really depends on how you personally interpret the original problem.

Do you read it as 48÷2(9+3) or mentally do you see it as 48÷2x(9+3)?
 
OomD said:
Math priorities dictate:

1. Brackets first
2. Muliply, Divide
3. Add, Subtract
4. Left to right where operators have same precendence

So, 48/2(9+3) becomes:
48/2(12) which is same as 48/2*12
Thus rule 4 invoked means it becomes the same as (48/2)*12
And that, is 288.
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If you stick with rule 4 then your logic is wrong as you should then have the following,

48÷2(9+3)
48÷2(12)
48÷24
2

Rule 4 states left to right when both have same preference, therefore you will have to first multiple the brackets by the 2 to then be able to divide the 48 by the sub answer as multiplication comes before division according to the aforementioned rules.

Therefore the answer is 2 (as per the rules).
 
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)

brackets first (9+3) =12
MD - LEFT TO RIGHT

so first 48/2 =24
then 24x12 =288
 
snail said:
If you stick with rule 4 then your logic is wrong as you should then have the following,

48÷2(9+3)
48÷2(12)
48÷24
2

Rule 4 states left to right when both have same preference, therefore you will have to first multiple the brackets by the 2 to then be able to divide the 48 by the sub answer as multiplication comes before division according to the aforementioned rules.

Therefore the answer is 2 (as per the rules).
Click to expand...

Have you finished school yet?
 
OK, I got some time left before I can play some BFBC2 and had a brain fart on the issue. Lets rewrite the problem to better understand it by dropping the 2

Q: 48÷(9+3) = ?

We can also write this as 48÷1(9+3) as we can say a missing real number in front of the brackets implies the value of 1. So 48÷(9+3) = 48÷1(9+3)=48÷12=48/12=4
 
Last edited:
HumanoidTyphoon said:
Im a programmer so I don't like it when people leave out brackets, it looks wrong.
48/(2(9+3)) is better
Click to expand...

you're not really good at basic maths for a programmer

lol_cat-12926.jpg
 
aai mense, het julle wiskundige geletterdheid gedruip? Hoekom kort jy 'n sakrekenaar vir so iets! 48/2*(9+3) = 24 * 12 = 288

eenvoudig!

Voorkeur van bewerking!
 
snail said:
If you stick with rule 4 then your logic is wrong as you should then have the following,

48÷2(9+3)
48÷2(12)
48÷24
2

Rule 4 states left to right when both have same preference, therefore you will have to first multiple the brackets by the 2 to then be able to divide the 48 by the sub answer as multiplication comes before division according to the aforementioned rules.

Therefore the answer is 2 (as per the rules).
Click to expand...

Nope. Brackets always comes first.
 
The answer is 2. In 48/2(9+3), the 2 forms part of the brackets. Adding brackets to 48/2 changes the argument entirely.
 
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