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- Thread starter Primula
- Start date

48/2 * 1/(9+3)

writing 48/2(9+3) and saying that it = (4/2) * (9+3) is incorrect.

What i'm trying to say in my currently brain-fried (from uni) state is that if 48/2 is not specifically written in brackets ")"

the 2(9+3) takes dominance since its considered under the division symbol. If more explanation is needed with what I said above, just ask. I get the feeling that when I come home get some rest and read what I wrote just now, I'll be confused at what I meant myself XD

If the problem is wirtten on paper as:

2

Then the answer is 288. The problem is if this was the original question, someone didn't transpose it into line form properly. The correct line form notation would be (48/2)(9+3).

If the problem is wirtten on paper as:

2

Then the answer is 288. The problem is if this was the original question, someone didn't transpose it into line form properly. The correct line form notation would be (48/2)(9+3).

Exactly what I said but in an understandable form. Thanks wedora ^^

It can easily be done if the person fails to see the space between the division sign and 2 thus they see 48/ 2 as 48/2 and therefore proceed to see the question as 48/2 x (9+3). I think this mathematical equation was presented in a rather sloppy fashion and there would be no room for interpretation if it was presented as:

48/24 or better yet 2/1 or simply 2.

or if they was seeking the alternative arrangement (48/2)*(9+3) then:

24x12

It is good practice when constructing mathematical formulas to simplify equations to its simplest form.

48/24 or better yet 2/1 or simply 2.

or if they was seeking the alternative arrangement (48/2)*(9+3) then:

24x12

It is good practice when constructing mathematical formulas to simplify equations to its simplest form.

The reason it was up for debate is because it was a test question, and TI-85's and TI-86's gave different answers (the 86 giving the correct answer). Its not an excuse though, because one of the first things they teach kids in algebra is how to write the problems safely into the calculator in line form. Basically, its the students fault for trying to use a cop-out on an easy question.

[], (), exponents (including roots, which are fractional exponents), * or /, + or -

As such, from left to right

48/2(9+3) =

48/2*12 =

24*12 =

288

For further proof, plug the equation into any calculator that allows for multiple inputs at once (scientific or graphing calculators for sure allow this, as does Google), it will output the answer of 288.

For more information about Order of Operations, feel free to Google it or see the Wikipedia article.

fixed.