Jump to content

48÷2(9+3)=?


Casper

48÷2(9+3)=?  

170 members have voted

  1. 1. 48÷2(9+3)=?

    • 2
      82
    • 288
      88


Recommended Posts

Your TI85 is broke.

It's not broke, but...

Different calculators. The newer ones (IE more accurate) have 288 as the answer. :D

It's not that they're more accurate -- it's that TI changed the logic.

http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=103110

Nobody is right because there is no agreed consensus on whether implied vs explicit multiplication takes precedence.

http://knowyourmeme.com/memes/48293

Edited by JRMMiii
Link to comment
Share on other sites

It's not broke, but...

It's not they they're more accurate -- it's that TI changed the logic.

http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=103110

Nobody is right because there is no agreed consensus on whether implied vs explicit multiplication takes precedence.

http://knowyourmeme.com/memes/48293

They are more accurate. Hence the updating of the logic. :lol:

In this instance it doesn't matter. 48÷2(9+3)= only has one instance of multiplication, and that's 24x12. :D

But with what you posted, "Implied and explicit multiplication is given the same priority."

Link to comment
Share on other sites

It's not broke, but...

It's not they they're more accurate -- it's that TI changed the logic.

http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=103110

Nobody is right because there is no agreed consensus on whether implied vs explicit multiplication takes precedence.

http://knowyourmeme.com/memes/48293

That second link really sheds some light on why people might think the answer is 2. Interesting. So Multiplication and Division precedence is just wrong but the precedence of implied multiplication is still debatable.

Either way, calculators updating their logic and the fact that the standard order of operations give the answer 288 says to me that the agreed on standard is 288 and ultimately in math the most important thing is that we all agree on the same rules otherwise spacecraft will fall from the sky.

Edited by vw151
Link to comment
Share on other sites

the first time i did it I thought it was 288

then I looked and see how it could be 2. I asked my math teacher friend and he said 288 so if I'm wrong I'm blaming one of the top public high schools in the state :D

Link to comment
Share on other sites

But with what you posted, "Implied and explicit multiplication is given the same priority."

Right -- but is that correct? :dunno:

http://mathforum.org/library/drmath/view/52582.html

5. There is still some development in this area, as we frequently hear

from students and teachers confused by texts that either teach or

imply that implicit multiplication (2x) takes precedence over

explicit multiplication and division (2*x, 2/x) in expressions

such as a/2b, which they would take as a/(2b), contrary to the

generally accepted rules. The idea of adding new rules like this

implies that the conventions are not yet completely stable; the

situation is not all that different from the 1600s.

In summary, I would say that the rules actually fall into two

categories: the natural rules (such as precedence of exponential over

multiplicative over additive operations, and the meaning of

parentheses), and the artificial rules (left-to-right evaluation,

equal precedence for multiplication and division, and so on). The

former were present from the beginning of the notation, and probably

existed already, though in a somewhat different form, in the geometric

and verbal modes of expression that preceded algebraic symbolism. The

latter, not having any absolute reason for their acceptance, have had

to be gradually agreed upon through usage, and continue to evolve.

As a coworker pointed out since his whole job is to fend off ambiguous questions all day long -- "the real idiots are the ones that answer without asking for clarification or don't realize you're allowed to say 'I don't know' when presented with a vague problem like that."

Link to comment
Share on other sites

ok seriously, its not 288. ive been in school for engineering for 3.5 years and have been through several advanced math classes. According to pemdas (parenthesis, exponents, multiply, divide, add, subtract) thats the order in which you are supposed to do the math. so there for you start with whats in the parenthesis which is (9+3) which equals 12. now you have 48/2(12), a number outside of parenthesis without anything in between means that you multiply so that is 2(12) which is 24. you are left with 48/24 which is 2.

BTW to those who used a calculator, they are not always correct ask any teacher or professor. there are several operations that they are not able to do.

Link to comment
Share on other sites

It's not broke, but...

It's not that they're more accurate -- it's that TI changed the logic.

http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=103110

Nobody is right because there is no agreed consensus on whether implied vs explicit multiplication takes precedence.

http://knowyourmeme.com/memes/48293

I've learned over the years that Justin is a very smart guy and just provided a great set of links. He still needs to change his avatar for a change though!

ultimately in math the most important thing is that we all agree on the same rules otherwise spacecraft will fall from the sky.

:lol:

ok seriously, its not 288. ive been in school for engineering for 3.5 years and have been through several advanced math classes. According to pemdas (parenthesis, exponents, multiply, divide, add, subtract) thats the order in which you are supposed to do the math. so there for you start with whats in the parenthesis which is (9+3) which equals 12. now you have 48/2(12), a number outside of parenthesis without anything in between means that you multiply so that is 2(12) which is 24. you are left with 48/24 which is 2.

BTW to those who used a calculator, they are not always correct ask any teacher or professor. there are several operations that they are not able to do.

THANK YOU!!!

  • Upvote 1
Link to comment
Share on other sites

ok seriously, its not 288. ive been in school for engineering for 3.5 years and have been through several advanced math classes. According to pemdas (parenthesis, exponents, multiply, divide, add, subtract) thats the order in which you are supposed to do the math. so there for you start with whats in the parenthesis which is (9+3) which equals 12. now you have 48/2(12), a number outside of parenthesis without anything in between means that you multiply so that is 2(12) which is 24. you are left with 48/24 which is 2.

BTW to those who used a calculator, they are not always correct ask any teacher or professor. there are several operations that they are not able to do.

:nono:

You should ask for a refund on your tuition.

Link to comment
Share on other sites

as an engineering student i looked at the problem and in my head got 2.

now i got 2 because i was taught that distributive multiplication comes before regular multiplication and division there for i did (9+3) then distributed the 2 -- 2(12)=24 then did 48/24. ..= 2

EDIT FOR CLARIFICATION:

i did not change the problem and got 2..

Link to comment
Share on other sites

Shit like this is why engineers don't know what vagina's taste like

the number 2 reason why it could be 2 or 288 and I don't care.

The #1 is because I will never use this equation in anything I do to make money so it doesn't effect me :D

Link to comment
Share on other sites

We can all agree it simplifies to 48÷2*12, and from that point anyone who does the division first must read from right to left, much like a terrorist might(since multiplication and division are equal). Anyone who answers 2 is now in the TSDB(terrorist screening database). 288 FTW!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...