1. ## 48/2(9+3)=?

I haven't seen this posted here yet... tell me if I missed it. Probably a lot of you have already seen it it elsewhere...

48/2(9+3)=2

or

48/2(9+3)=288

After seeing the debate elsewhere, I'm kinda interest to see how the debate evolves/devolves amongst the Rift community.  Reply With Quote

2. ## It's been posted before and the correct answer is 2.  Reply With Quote

3. ## The answer is 288. It takes a lot of fail sauce to get the answer 2 out of it.

Like the poster above...  Reply With Quote

4. ## Since I can't edit anymore, the rule that applies is called multiplication by Juxtaposition.

48/2(9+3)=x
48/2(12) = x

The rule of juxtaposition tells us 48/2(12) = 48/(2*12)

48/24 = x
2=x  Reply With Quote

5. ## Wolfram Alpha says 288

Naturally so. As rules of operations are:

Rule 1: First perform any calculations inside parentheses.
Rule 2: Next perform all multiplications and divisions, working from left to right.
Rule 3: Lastly, perform all additions and subtractions, working from left to right.
How can this be such a hard question to be understood? Do they not even teach basic math in school anymore?  Reply With Quote

6. ## The answer is 2

elementary math teaches
Please Excuse My Dear Aunt Sally
mathmatics works in this order
Parenthesis Exponents Multiplication Division Addition Subtraction.
Therefore you do the 9+3 first because its in parenthesis
then you multiply by 2 because you always multiply before dividing which makes 24
and 48 divided by 24 = 2  Reply With Quote

7. ## Ahhh...

Good ol' BODMAS Now with Comic Sans!

Personally I'm terrible at maths and my answers would probably be neither 2 nor 288 I'm that bad.  Reply With Quote

8. ##  Originally Posted by Konk elementary math teaches
Please Excuse My Dear Aunt Sally
mathmatics works in this order
Parenthesis Exponents Multiplication Division Addition Subtraction.
Therefore you do the 9+3 first because its in parenthesis
then you multiply by 2 because you always multiply before dividing which makes 24
and 48 divided by 24 = 2
Again, as I just posted... multiplication and division are done from left to right, just as addition and subtraction. The only non-parallel priority are between P, MD, and AS as groups.

48/2(9+3)

9+3 = 12

48/2(12) = 24(12)

24(12)=288

There is no argument, this is the only proper answer. It was taught in basic math, to say otherwise IS fail.  Reply With Quote

9. ##  Originally Posted by Konk elementary math teaches
Please Excuse My Dear Aunt Sally
mathmatics works in this order
Parenthesis Exponents Multiplication Division Addition Subtraction.
Therefore you do the 9+3 first because its in parenthesis
then you multiply by 2 because you always multiply before dividing which makes 24
and 48 divided by 24 = 2
You're right and wrong. The answer is 2, but order of operations priority is shared equally between Multiplication and division.

The answer is 2 because 2(9+2) is what is known as juxtaposition. There is no operation sign, the 2 is juxtaposed onto the (9+2) meaning you have 2 of whatever is in the brackets. To assume the absence of an operation instantly means multiplication is a fallacy.

48/2x = 48/(2*x)  Reply With Quote

10. ##  Originally Posted by Omega Emperor Again, as I just posted... multiplication and division are done from left to right, just as addition and subtraction. The only non-parallel priority are between P, MD, and AS as groups.

48/2(9+3)

9+3 = 12

48/2(12) = 24(12)

24(12)=288

There is no argument, this is the only proper answer. It was taught in basic math, to say otherwise IS fail.
48/2(9+3) is NOT equal to 48/2*(9+3)

48/2(9+3) = 2
48/2*(9+3) = 288  Reply With Quote

11. ##  Originally Posted by Konk then you multiply by 2 because you always multiply before dividing which makes 24
and 48 divided by 24 = 2
This is a common misconception, no matter which acronym you use multiplication and division do not take precedence of one or the other, they are of equal footing so to speak..

For example you're quoting PEMDAS, which as you say lists Multiplication before Division, but many others (and indeed the post below you) will quote BODMAS which puts division before multiplication.. they can't both be right!?

In reality, the order of operations is (and each individual line indicates the same level of precedence)..

Parenthesis or Brackets
Exponents or Orders
Multiplication or Division  Reply With Quote

12. ##  Originally Posted by Sinndel 48/2(9+3) is NOT equal to 48/2*(9+3)

48/2(9+3) = 2
48/2*(9+3) = 288
It is equal as such, as X(Y+Z) is always Y+Z = A which X(A). You don't like it, change the math books.  Reply With Quote

13. ##  Originally Posted by Omega Emperor It is equal as such, as X(Y+Z) is always Y+Z = A which X(A). You don't like it, change the math books.
All my math books will go on to say that X(A) then equals (X*A), and that you can't simpy vaporize the brackets and assume multiplication. Look it up, juxtaposition.  Reply With Quote

14. ##  Originally Posted by Sinndel All my math books will go on to say that X(A) then equals (X*A), and that you can't simpy vaporize the brackets and assume multiplication. Look it up, juxtaposition.
Indeed, but there is no actual rule to state that multiplication by juxtaposition must be done prior to all other operations, it has no higher precedence than explicit multiplication.. the juxtaposition is merely that it's implied by virtue of being directly outside the parenthesis and the absence of the multiplication notation ie. a x or *  Reply With Quote

15. ##  Originally Posted by Sinndel All my math books will go on to say that X(A) then equals (X*A), and that you can't simpy vaporize the brackets and assume multiplication. Look it up, juxtaposition.
I don't know what math books you're reading, but as someone that's never gotten anything less than at least an A- in math from elementary to highschool and does math classes in college just to increase my GPA, I can say with certainty you and they are wrong. X(4+3) is still 7X, because the parenthesis automatically symbolize multiplication when there's no other operation sign to differentiate.

Wolfram Alpha even says you're wrong, on top of any calculator as well.

PARENTHESIS FIRST, PERIOD.  Reply With Quote

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