48÷2(9+3) = ???

[frankenbeemer]

PEMDAS fucking rules

2 nitwits

more likely
P
E
MD or DM
AS or SA

[imsotyerred]

more likely
P
E
MD or DM
AS or SA

___48___
2 x (12)

suck it

[reelizmpro]

When you add 9 + 3 you get 12, then you are done with the parenthetical element. At that point, you return to the left because multiplication and division are equal operators. I have yet to see the rule which states that 2(some operation) is different from 2*(some operation) or 2 x (some operation).

You are not done with the parentheses. You have to pay close attention to detail. 2(12) is not the same as 2*12. No where do you see a multiplication symbol correct? You only multiply 2 and 12 through distribution which takes precedence over division...get it? It's not correct form to go from 2(9+3) to 2*12. That's sloppy math. I know it's the same result but when you have to follow PEMDAS, it makes all the difference. Following the proper steps is critical. I'll say it again...parentheses are only gone when you distribute (not going to say multiply because you guys are hung up on it and not paying attention to parentheses) 2(12) or add (18 + 6).

[Click]

http://www.wolframalpha.com/input/?i=48%C3%B72%289%2B3%29

http://www.wolframalpha.com/input/?i=48%C3%B72%5B9%2B3%5D

Interesting quandary we have here

[reelizmpro]

http://www.wolframalpha.com/input/?i...B72%289%2B3%29

http://www.wolframalpha.com/input/?i=48%C3%B72%5B9%2B3%5D

Interesting quandary we have here

That's why you have to be on the safe side and do math cleanly, step by step, by hand. Calculators can only give the correct answer if you input the problem in right.

Looking at the "288" example...the way they inputed the problem can also be written as 48(9+3) / 2 which is incorrect and a completely different problem than 48 / 2(9+3) and that's the way the calculator is interpreting the problem. IF it were (48/2) (9+3) where it was explicitly stated that (48/2) then it's 24(9+3) =288.

[frankenbeemer]

http://www.wolframalpha.com/input/?i...B72%289%2B3%29

http://www.wolframalpha.com/input/?i=48%C3%B72%5B9%2B3%5D

Interesting quandary we have here

No quandary, two different equations. I repeat, the / is not a vinculum.

[frankenbeemer]

Also note the original equation does not have / in it. I don't know why that is so confusing. I am aware they are often substituted, but it seems to add to the confusion, see Click's example.

Now back to my question:

Where in the associative property rule (or any rule, unless it's just your opinion) does it say that 2(9 + 3) is treated differently than 2 x (9 + 3) or 2 * (9 + 3)?

[reelizmpro]

Also note the original equation does not have / in it. I don't know why that is so confusing. I am aware they are often substituted, but it seems to add to the confusion, see Click's example.

Now back to my question:

Where in the associative property rule (or any rule, unless it's just your opinion) does it say that 2(9 + 3) is treated differently than 2 x (9 + 3) or 2 * (9 + 3)?

LOL. Look, you are missing the point. 2(9+3) = 2(12) or (18+6). 2x(9+3) = 2x(12) or 2x12 now you use a multiplication sign instead of parentheses it messes everything up because of PEMDAS, understand? Shouldn't be any multiplication signs. 48 DIVIDED by the term "2(9+3)" is how I interpret a problem like this unless (48/2) is highlighted in parentheses which they are not.

[frankenbeemer]

LOL. Look, you are missing the point. 2(9+3) = 2(12) or (18+6). 2x(9+3) = 2x(12) or 2x12 now you use a multiplication sign instead of parentheses it messes everything up because of PEMDAS, understand? Shouldn't be any multiplication signs. 48 DIVIDED by the term "2(9+3)" is how I interpret a problem like this.

Show me the rule that says that 2(9+3) is different from 2*(9+3).

[reelizmpro]

Show me the rule that says that 2(9+3) is different from 2*(9+3).


[ATTACH]40973[/ATTACH]

It's not different in that the result is different. It's different because it doesn't involve distribution but multiplies instead. There's no multiplication signs in the problem only divide (whichever symbol you prefer), parentheses (distribution) and addition. Take what you have and apply PEMDAS.

[frankenbeemer]

Humbug.

[imsotyerred]

Also note the original equation does not have / in it. I don't know why that is so confusing. I am aware they are often substituted, but it seems to add to the confusion, see Click's example.

Now back to my question:

Where in the associative property rule (or any rule, unless it's just your opinion) does it say that 2(9 + 3) is treated differently than 2 x (9 + 3) or 2 * (9 + 3)?

Back to third grade math with you, sir.

the / is the exact same, can be substituted (no ifs, ands or buts) for this symbol


and take a close look at the symbol, it's almost as if the two dots could be replaced by two variables such as:

___X___
.....Y

or

___48___
..2(9+3)

the creates a separation between two different parts of the problem

[dsobering47]

answer is 2, yo

I treated the problem like:

48/2(9+3)
48/2(12)
48/24
=2

But what do I know, I only passed Calculus, I'm not an omni-potent all-intelligent math website (or a calculator thats proven to screw up problems like these)

[frankenbeemer]

If you're saying the first division symbol encountered in the equation groups all operations after it, then 12/4+2=2. I'm wondering where in your third grade math book it says that.

[dsobering47]

well suck me sideways, I would bet my house that the answer is 2.