It's quite common in university mathematics to solve parts of equations 'out of context'. I guess I've been out of school too long ^_^
Why solve half an equation out of context, then insert it back into another formula, this doesn't prove anything?
12 + 5 + 13 / 8 + 5 * 12
x = 5+13
x = 18
12 + x / 8 + 5 * 12
Calculators and programming languages are not references for math expressions. Neither Matlab nor Maple handle the implicit multiplication (Maple returns 24 and ignores the rest).After Excel, Mathematica/Maple, Matlab, Python, TI-83, Google Calc, a Mathematician, a math Teacher, and every other math major here except breakpoint(who invented his own random rule) has said 288.
At some point you would think the computer programs and the people with actual, real credentials would be listened to.
And no taking a couple calc classes in college doesn't count.
1/3 = 0.333...Right, they're not arbitrary. There are usually sensible reasons why one rule has been adopted over another. But in controversies like these, one ought to realize that it won't be settled necessarily by what makes the best sense to oneself. Others have made the ruling, (mathematical symbols are accepted internationally, btw).
Here's another troublemaker, let x = .999..., where the ellipses implies that the 9s go on forever. Did you know that x = 1? Anyway, that's what the establishment believes, if you don't like it, maybe you can change their minds, but until that happens x = 1 will give a correct answer on a test.
i highly doubt that. did you go to standford too? :roll:But what's inside the parentheses is in the denominator, not the numerator.
48/2(12) = 2
(48/2)(12) or (48/2)12 = 288
Thus, the way it's written, the answer is 2.
(Note: I have scored in the Top 1% or 2% in the country in every standardized math test I have ever taken, and have engineering and MBA degrees from Ivy universities.)
FAIL...You have to distribute the two first. 2x9 is 18 and 2x3 is 6. 18+6=24. 48/24 = 2. I just got home from the club, and I had 3 vodka sprites. Winning!
WHY Multiply first???48÷2(9+3) = using PEMDAS
parentheses: 9+3= 12... then multiply so thats 2x12 = 24, then divide 48/24 thats 2
Because if you are taught PEMDASWHY Multiply first???
Multiply has no priority over division...
48/2(9+3) = 48 / 2 * 12 = (left to right) 24 * 12 = 288
End of the story...
In elementary mathematics, a term is either a single number or variable, or the product of several numbers or variables separated from another term by a + or - sign in an overall expression. For example, inPlease do so, so you can understand that it makes NO sense
Why didn't you assign x=48/2???
You are changing the meaning of the original statement...
YOU are taught WRONG.Because if you are taught PEMDAS
division (notice how it comes after multiplication)
I'm no longer saying it's the correct way but that's the reason WHY.
Obviously you did not do anything with psychology...The only FAIL here is you, because you're so damn upset over an internet forum. I didn't go to college, so fail x 10.
http://www.purplemath.com/modules/orderops.htmA common technique for remembering the order of operations is the abbreviation "PEMDAS", which is turned into the phrase "Please Excuse My Dear Aunt Sally". It stands for "Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction". This tells you the ranks of the operations: Parentheses outrank exponents, which outrank multiplication and division (but multiplication and division are at the same rank), and these two outrank addition and subtraction (which are together on the bottom rank). When you have a bunch of operations of the same rank, you just operate from left to right. For instance, 15 ÷ 3 × 4 is not 15 ÷ 12, but is rather 5 × 4, because, going from left to right, you get to the division first. If you're not sure of this, test it in your calculator, which has been programmed with the Order of Operations hierarchy.
You're not understanding. An OPEN minded person wouldn't close people off because they were wrong but instead explain to them why they were wrong so in the future they wouldn't make the same mistake. But instead you're being a ****** and calling everyone retards because they were taught incorrectly.YOU are taught WRONG.
Multiplication has NO priority over division, same for addition/subtraction.
However, multiplication and division have priority over the addition and subtraction.
You do not understand what they taught you or they did it wrong.
Believe me, I learned where math was invented.
This is a 8-year-old math people!
So, you are going to College...I analyze financial statements and make a comfortable living while I wait to earn my law degree. Teehee.
Sorry if I left that impression however, I never called anyone a ****** in this thread...You're not understanding. An OPEN minded person wouldn't close people off because they were wrong but instead explain to them why they were wrong so in the future they wouldn't make the same mistake. But instead you're being a ****** and calling everyone retards because they were taught incorrectly.
The format used to program a computer to solve equations is not the same as writing out the equation in a format to be solved by hand.The by hand rules are the same as computer rules...
Your sig says it all. Please stop humiliating yourself, seriouslyThe format used to program a computer to solve equations is not the same as writing out the equation in a format to be solved by hand.
BTW, if the 12 was supposed to be in the numerator, the equation would have been written:
48(9+3)÷2 or 48(9+3)/2
The fact that the equation was written:
48÷2(9+3) which is the same as 48/2(9+3) means that the (9+3) or (12) is in the denominator.
Numbers or variables to the left of the / are in the numerator and numbers or variables to the right of the / are in the denominator. Why? Because using the forward slash / symbol is how people type out the divide by line using a keyboard because they can't easily type out a horizontal line and put numbers and variables above the line for the numerator and numbers and variables below the line for the denominator. Thus, the / sign is used for convenience, with the numerator to the left of the / and the denominator to the right of the /.
No it can't. It can quite obviously mean 48/2*12
Surely, using your own logic, if the 12 was the denominator, it should be written like:
to make it clearer.
And if you want the 12 in the numerator, the equation would have been written this way:Actually, if you want 12 in the denominator. You do this:
Good to see some people stop and think rather than blindly following rules they learned in school.And if you want the 12 in the numerator, the equation would have been written this way:
48(9+3)/2 or 48(12)/2
The 12 would have been to the left of the /. But since the 12 is to the right of the /, it's in the denominator. That's why the equation was written as: 48/2(9+3) and NOT 48(9+3)/2