48÷2(9+3) = ???

[frankenbeemer]

this

What if i use PEDMAS?

[frankenbeemer]

I forgot to insult those who think the distributive property of multiplication compels you to distribute the terms before proceeding. You are really dumb too. But I don't hate you as much. The distributive property just says that you can distribute the terms, not that you must. I think that covers all the people I would like to insult. Thanks.

[gwb72tii]

PEMDAS

48÷2(9+3)

48/2(12)

48/24

= 2

you do multiplication before division

this

[frankenbeemer]

I'm ready to forgive those who think implicit multiplication is of higher priority. I can even forgive those who think the ÷ sign renders everything to the right as part of the denominator. You can all ride in my eta, but you won't want to. But those who think division takes precedence over multiplication or vice versa are really dumb. I hate you.

Mnemonics are often used to help students remember the rules, but the rules taught by the use of acronyms can be misleading. In Canada the acronym BEDMAS is common. It stands for Brackets, Exponents, Division, Multiplication, Addition, Subtraction. In other English speaking countries, Brackets may be called Parentheses, or symbols of inclusion and Exponentiation may be called either Indices, Powers or Orders, and since multiplication and division are of equal precedence, M and D are often interchanged, leading to such acronyms as BIMDAS, BODMAS, BOMDAS, BERDMAS, PERDMAS, PEMDAS, and BPODMAS.

These mnemonics may be misleading, especially if the user is not aware that multiplication and division are of equal precedence, as are addition and subtraction. Using any of the above rules in the order "addition first, subtraction afterward" would also give the wrong answer.

[frankenbeemer]

for order of operations multiplying ALWAYS comes before dividing

Do you really believe this?

[reelizmpro]

here is another example of PEMDAS, or order of operations

24÷4(1+5)
24÷4(6)
multiply
24÷24 =1
then Division leave you with 1

The wrong way

24÷4(1+5)
24÷4(6)
6(6) = 36


Same question, but is it 1 or 36? its 1, for order of operations multiplying ALWAYS comes before dividing, the answer is 1

Excellent example...

Technically, they are equal so that's not the reason you multiply first. It's just that multiplication through distribution (due to parentheses) takes priority because 24 is being divided by the expression "4(6)" not just 4. This is my entire argument on why I believe this problem should be considered as 48/[2(9+3)]. 2(9+3) = (18+6) or 2(12) and 48 is divided by this expression. I believe many people just multiply first because it works out most of the time. However, if it were 24÷4x6 then you'd operate left to right because division and simple multiplication are equal.

[mrsleeve]

this is how I learnded PEMDAS

Parentheses then Exponents the Mult/Division (from left to right) then add sub (from left to right)


thats how its supposed to be

[Matt-B]

here is another example of PEMDAS, or order of operations

24÷4(1+5)
24÷4(6)
multiply
24÷24 =1
then Division leave you with 1

The wrong way

24÷4(1+5)
24÷4(6)
6(6) = 36


Same question, but is it 1 or 36? its 1, for order of operations multiplying ALWAYS comes before dividing, the answer is 1

[mrsleeve]

It's 2 because you don't do Multiplication AND Division from left to right, you do Multiplication and THEN Division from left to right.

NO Multiplication and Division are equal operations and need to be done form left to right the same as Addition and subtraction.


WTF are they teaching in school anymore because its sure not math, No wonder our kids are falling behind the rest of the world.

[delfin]

It's 2 because you don't do Multiplication AND Division from left to right, you do Multiplication and THEN Division from left to right.

[tonywonder]

you still cant read though.

[frankenbeemer]

this is never going to end. but anyways. i looked on one of the math sites that has a calculator. and 48÷2(9+3)=2 but 48/2(9+3)= 288 didnt know theres a difference in those two notations that i thought represented the same thing. so fuck it. we all win.

http://www.mathgoodies.com/worksheets/

Indeed it does. That's amusing as hell.

[Massimo]

I have done a bit of reading as well a math professor on ubuntu says that it is actually a poorly written equation therefore there is no answer because the equation is incomplete.

The person who is wrong is the person who wrote the equation. Apparently maths has ambiguities.

Therefore the OP Fails The Internets. Finish your maths equation please.

[tonywonder]

this is never going to end. but anyways. i looked on one of the math sites that has a calculator. and 48÷2(9+3)=2 but 48/2(9+3)= 288 didnt know theres a difference in those two notations that i thought represented the same thing. so fuck it. we all win.

http://www.mathgoodies.com/worksheets/

[frankenbeemer]

The answer is 2. Parenthesis first, the you get 48/24 = 2. after getting a 5 on the Calc AP BC test I should at least know that one!

Appeal to authority noted. One question. Does a BSME degree trump your calculus grade?