48÷2(9+3) = ????
- Thread starter nubian
- Start date
yup, he fails to understand that his example 2(9) = 2*9 has less than 2 equations so there is no need to order them...
but good effort LOL
288
yup, he fails to understand that his example 2(9) = 2*9 has less than 2 equations so there is no need to order them...
36 ÷ 2(9)= 36 ÷ (2 * 9)...please tell me how this is NOT right to left (Based on Order of equations this FALSE).
please
excuse
my
dear
aunt
sally
the first equation you must solve is the one involving the parentheses. That equation is 2(9) = 18. End of discussion.
prove it
36÷2(9) still has a Parentheses. According to PEMDAS you have to get rid of the parentheses! how do you get rid of 2(9)? you make it 18.
for our problem 48÷2(9+3) the next step is 48÷2(12). you still have a prentheses! to get rid of it you now have 48÷24. when you solve for 9+3 the equation is 48÷2(12) not 48÷2 *12. do you see the difference now?
for our problem 48÷2(9+3) the next step is 48÷2(12). you still have a prentheses! to get rid of it you now have 48÷24. when you solve for 9+3 the equation is 48÷2(12) not 48÷2 *12. do you see the difference now?
let me answer for him: no. followed by some more retarded nonsense
You got rid of the parentheses when you solved (9+3). (9+3)= 12. The parentheses is DONE after that. (9+3) IS the equation. 12 is NOT an equation.
3 outta 5 still getting it wrong....i need the fam to pay more attention in math class
would your argument still hold if 9 & 3 were replaced by c & d????? Answer that question and you should be able to see the flaw in your argument. Good luck.
EDIT: but when 12 is in parentheses, it takes priority.
They are.
36÷2(9) = 36÷(2(9)) because you evaluate the parenthesis first. In both cases, the items in the parentheses yield 18. What is being missed here is that we UNDERSTAND that 2(9) implies a multiplication. That is 2x9, however since it was not written that way, it was instead written WITH the parenthesis, it is telling us to evaluate the contents of the parenthesis, that is 2x9, BEFORE we evaluate the rest of the equation.
36÷2x9 =/= 2x9÷36 because the rules state multiplication before division, even tho in the first one division was written BEFORE the multiplication (going from left to right), it doesn't matter, we take the multiplication first. So the first one would be 36÷18 whereas the second one would be 2x0.25. Yet again, what ppl are missing is that the whole left to right evaluation holds true for identical signs. That is 2+3+4 = 4+3+2. And yes, i know that this was a poor example because 2-3+4 = 4-3+2
Let's take this for example:
2+3+4÷4+3+2 = 2+3+1+3+2 =/= (2+3+4)÷(4+3+2)
c = 9
d = 3
e = c + d
e = 12
48÷2(c+d=e) = 48÷2(e)
(e) = e
48÷2(e) = 48÷2(12) = 48÷2x(12)
ORDERS OF OPERATIONS
Rule 1: First perform any calculations inside parentheses (THIS IS 12...it is complete after that).
Rule 2: Next perform all multiplications and divisions, working from left to right.
Last edited:
HAHAHA you're a fool for this, better get that design out there, with this problem all over the net its bound to sell homie!! $$$$$
http://www.solving-math-problems.com/math-symbols-parentheses.html
just because u solve whats INSIDE the parentheses it does not ELIMINATE the PARENTHESES!
again 48/2(12) is not the same as 48/2*12. 2(9+3)=2(12) not 2*12. that seems to be the issue confusing everyone
and another one: http://cstl.syr.edu/fipse/algebra/unit2/parenth.htm
* We first begin simplifying within the parentheses. In the example, this means adding the terms inside the parentheses.
* Then multiply the term inside the parentheses with the one outside the parentheses.
3 (5x + 2x) = 3 (7x)
3 (7x) = 21x
This is wrong. LOL.
You complete what's WITHIN the parenthesis first. Since you'd just have (9) there is nothing to complete, and you do the math from left to right.
I didn't even bother replying to that ridiculous post LOL.
LMAO!!!! You basically sonned yourself *AGAIN* with this right here. You can stop playing this game now. Thanks.
Ok.
People were not familiar with the rule of equal rank how you expect anyone to be familiar with the fact 2(9+3) having higher rank. Its not about the answer anymore, its about how you solve it. People answering it with either 288 or 2 are working the problem the wrong way to begin with.
Dog, what you just posted is ONE EQUATION. 3 (7x) IS ONE EQUATION.
48÷2(12) is TWO EQUATIONS. With two equations, YOU MUST GO LEFT TO RIGHT.
I'm not even going to begin to scour this thread, but has anyone brought up the fact that this problem is written in scientific notation?
alright i'm all laughed out for the night. here's something to wrap it up for the night.
peace
seriously, we're going to need to get steven hawking on this shit.
order of operations and simplifying tutorial:
http://www.purplemath.com/modules/orderops.htm
go through it and LEARN
Example: Simplify 16 – 3(8 – 3)^2 ÷ 5
Example: Simplify 16 ÷ 2[8 – 3(4 – 2)] + 1 **for this one, they even show you how to use your graphing calculator**
http://www.purplemath.com/modules/orderops.htm
go through it and LEARN
Example: Simplify 16 – 3(8 – 3)^2 ÷ 5
Example: Simplify 16 ÷ 2[8 – 3(4 – 2)] + 1 **for this one, they even show you how to use your graphing calculator**
and then what comes first? multiplication or division? what is 48 divided by 2*12????been doing this since 5th grade. the answer is 2. Sorry charlie.
So what you guys saying that the answer is two are saying is that this:
48/2 (9+3)
Is the same as this:
48/ [2(9+3)] which is 2.
48/2 (9+3) is actually the same as (48/2)(9+3) which is 288
It's not a matter of not knowing. It's that some were acting like authorities on the subject and putting out misinformation...not being open minded even when they know they were not experts at math
dude the point was the parentheses in proper notation is SILL there. everyone getting 288 is assuming 2(12) turns into 2*12 in this equation it does not due to the fact that their is another equation 48/2(12).
I have said it before and i will say it again, in no situation would ever write an equation like this. in a real life scenario there would be another parentheses or it would be written 48/2*(9+3).it is poorly written on purpose. this would be a great finale extra credit question
go through this tutorial a couple of times and you will get it.order of operations and simplifying tutorial:
http://www.purplemath.com/modules/orderops.htm
go through it and LEARN
Example: Simplify 16 – 3(8 – 3)^2 ÷ 5
Example: Simplify 16 ÷ 2[8 – 3(4 – 2)] + 1 **for this one, they even show you how to use your graphing calculator**
For the umpteenth time
PEMDAS is
Parenthesis
Exponents
Multiplication AND division
Addition and Subtraction.
So when you're faced with a problem with parentheses, multiplication and division you complete the math WITHIN the parentheses FIRST. Then when that is complete and all that is left is division and multiplication you work LEFT TO RIGHT. Math and division are of equal precedence, and when faced with that you complete the problem in the normal manner - left to right. If the multiplication is on the right and division is on the left, you do it left to right. If the multiplication is on the left and the division is on the right you do it left to right.
You would jump around if there was addition and multiplication, or division and subtraction.
But if there's multiplication and division then you complete the problem left to right.
If there's addition and subtraction you complete it left to right.
If there's addition THEN multiplication you complete the multiplication THEN the addition - ex 2+4*3. You do the multiplication (4*3) then the addition of two.
this shit is NOT rocket science.
But what I'm seeing in this thread are people who are capable of understanding this concept, and a whole lot of people trying to do it the simplest way they know.
PEMDAS is
Parenthesis
Exponents
Multiplication AND division
Addition and Subtraction.
So when you're faced with a problem with parentheses, multiplication and division you complete the math WITHIN the parentheses FIRST. Then when that is complete and all that is left is division and multiplication you work LEFT TO RIGHT. Math and division are of equal precedence, and when faced with that you complete the problem in the normal manner - left to right. If the multiplication is on the right and division is on the left, you do it left to right. If the multiplication is on the left and the division is on the right you do it left to right.
You would jump around if there was addition and multiplication, or division and subtraction.
But if there's multiplication and division then you complete the problem left to right.
If there's addition and subtraction you complete it left to right.
If there's addition THEN multiplication you complete the multiplication THEN the addition - ex 2+4*3. You do the multiplication (4*3) then the addition of two.
this shit is NOT rocket science.
But what I'm seeing in this thread are people who are capable of understanding this concept, and a whole lot of people trying to do it the simplest way they know.
Im not so sure now...lol
i noticed on the youtube vid with the calculator that got 2 as the answer used the "÷" sign
my TI-83 uses the "/"and gets 288
even on mathway
48÷2(9+3) gave me 2
48/2(9+3) gave me 288
someone mentioned that the signs might have different meanings earlier but then this would have to be explained
i noticed on the youtube vid with the calculator that got 2 as the answer used the "÷" sign
my TI-83 uses the "/"and gets 288
even on mathway
48÷2(9+3) gave me 2
48/2(9+3) gave me 288
someone mentioned that the signs might have different meanings earlier but then this would have to be explained
MAN IM GOING TO SLEEP
NO NO NO and NO 48/2 (9+3) =/= 48/2(9+3). in 48/2 (9+3) there is a space in btw 48/2 and (9+3) if there is no integer in front of a () it is assumed to be 1. however in 48/2(9+3) the 2 is the integer in front of the (). so when you simplify you get 48/2(12) NOT 48/2 (12). there is a # in front of the () so when you solve for whats inside the (), those () ARE STILL THERE AND THAT # IS STILL ATTACHED TO THAT (). the () have to be eliminated BEFORE you can then move on with the left to right calculations
Similar threads
