Okay Math Geniusues... What's 48÷2(9+3) ? - Page 2 - YorkieTalk.com Forums

AllDogBoots · 04-07-2011, 02:22 PM

Quote:

Originally Posted by linz06

I believe the answer is 288..

48÷2(9+3)

48 ÷ 2 x (9+3)

48 ÷ 2 x 12

24 x 12

=288

After the parentheses, there is only multiplication and division left to do, and they follow left to right.

Ellie May · 04-07-2011, 02:26 PM

Please
Excuse
My
Dear
Aunt
Sally

48/2(12)

The 2x12 has to go first.

salazark · 04-07-2011, 02:34 PM

I think you might be getting 288 when you put it into a calculator based on how you're entering it. If you enter if from left to right you are in essence putting parentheses in without realizing it and thus changing the answer. I agree with 2 for the answer.

linz06 · 04-07-2011, 02:37 PM

Quote:

Originally Posted by salazark

I think you might be getting 288 when you put it into a calculator based on how you're entering it. If you enter if from left to right you are in essence putting parentheses in without realizing it and thus changing the answer. I agree with 2 for the answer.

I put it in the equation line exactly as written... 48 ÷ 2 (9+3) then hitting enter for the answer.

Wylie's Mom · 04-07-2011, 02:39 PM

Let's see (this could be embarrassing):

48 ÷ 2(9+3)
48 ÷ 18 + 6
48 ÷ 24
= 2

Okay, now I'm gonna look

.

Maxman · 04-07-2011, 02:40 PM

My head hurts!

Rhetts_mama · 04-07-2011, 02:41 PM

Using PEMDAS to solve equations:

Evaluating Algebraic Expressions Order of Operations/P.E.M.D.A.S.

JeanieK · 04-07-2011, 02:47 PM

you always do the work in the parentheses first.

Order of operations:
The operations inside parentheses () and brackets [] are done first.
Then any operations involving exponents (which you will learn about later).
Then do all multiplying and dividing from left to right.
Finally, do all addition and subtraction from left to right.

Pre-Algebra: Basic Equations - Math for Morons Like Us

48 /2 (9+3)
48/ 2x12
24x12
288

linz06 · 04-07-2011, 02:52 PM

Quote:

Originally Posted by JeanieK

you always do the work in the parentheses first.

Order of operations:
The operations inside parentheses () and brackets [] are done first.
Then any operations involving exponents (which you will learn about later).
Then do all multiplying and dividing from left to right.
Finally, do all addition and subtraction from left to right.

Pre-Algebra: Basic Equations - Math for Morons Like Us

48 /2 (9+3)
48/ 2x12
24x12
288

The way the equation is written in a line is what makes everyone get different answers, because most people will just assume that everything after the division sign is the denominator. The 2 in front of the parantheses is not PART of the parentheses, but can be written that way to show multiplication. Multiplication and division are equal, and are carried out left to right.

JeanieK · 04-07-2011, 02:56 PM

Quote:

Originally Posted by JeanieK

you always do the work in the parentheses first.

Order of operations:
The operations inside parentheses () and brackets [] are done first.
Then any operations involving exponents (which you will learn about later).
Then do all multiplying and dividing from left to right.
Finally, do all addition and subtraction from left to right.

Pre-Algebra: Basic Equations - Math for Morons Like Us

48 /2 (9+3)
48/ 2x12
24x12
288

did not mean to quote this'

fasteddie · 04-07-2011, 03:00 PM

Quote:

Originally Posted by Rhetts_mama

Using PEMDAS to solve equations:

Evaluating Algebraic Expressions Order of Operations/P.E.M.D.A.S.

Oooh, good link, with great example! THANKS!

I've actually been debating this with a few people for a few hours now...

and that's the BEST LINK I've seen to support my answer! Teehee...

The main debeate is if people think the 2(9+3) takes precedence (or should go first) BEFORE the division or not... I personally think you do 2(9+3) first...

JeanieK · 04-07-2011, 03:32 PM

Quote:

Originally Posted by fasteddie

Oooh, good link, with great example! THANKS!

I've actually been debating this with a few people for a few hours now...

and that's the BEST LINK I've seen to support my answer! Teehee...

The main debeate is if people think the 2(9+3) takes precedence (or should go first) BEFORE the division or not... I personally think you do 2(9+3) first...

Do only the 9+3 first
then work the equation for left to right.

AMD · 04-07-2011, 04:27 PM

Quote:

Originally Posted by fasteddie

So what's the answer to:

48÷2(9+3)

Show your work...

Is this a test? LOL

48÷2(9+3)
= 48/2(12)
= 48/24
= 2

AMD · 04-07-2011, 04:58 PM

Essentially the problem is 48/[2(9+3)]. You cannot split up the demoninator...solve the entire denominator before dividing. It's alot easier to see written as a fraction numerator on top of a demoninator instead of the "/" symbol.

To get 288 as the correct answer, the problem would have to be written (48/2)*(9+3). Otherwise you cannot divide before solving your denominator.

JeanieK · 04-07-2011, 05:08 PM

Quote:

Originally Posted by AMD

Essentially the problem is 48/[2(9+3)]. You cannot split up the demoninator...solve the entire denominator before dividing. It's alot easier to see written as a fraction numerator on top of a demoninator instead of the "/" symbol.

To get 288 as the correct answer, the problem would have to be written (48/2)*(9+3). Otherwise you cannot divide before solving your denominator.

You put the denominator in brackets. it was not in brackets originally.

You solve what is in the parentheses first, then work the multiplication and division left to right.

That is what the rules state.

04-07-2011, 02:26 PM	#17
Ellie May And Rylee Finnegan Donating Member Join Date: Apr 2007 Location: Metro Detroit, MI Posts: 17,928	Please Excuse My Dear Aunt Sally 48/2(12) The 2x12 has to go first. __________________ Crystal, Ellie May (RIP), Rylee Finnegan, and Gracie Boo🐶

04-07-2011, 02:34 PM	#18
salazark Donating YT 500 Club Member Join Date: Apr 2007 Location: Alabama Posts: 941	I think you might be getting 288 when you put it into a calculator based on how you're entering it. If you enter if from left to right you are in essence putting parentheses in without realizing it and thus changing the answer. I agree with 2 for the answer. __________________ *Karen and the Kids* Sadie and Beemer

04-07-2011, 02:39 PM	#20
Wylie's Mom Furbutts = LOVE Donating Member Moderator Join Date: Jan 2005 Location: Phoenix, AZ Posts: 35,889 Blog Entries: 2	Let's see (this could be embarrassing): 48 ÷ 2(9+3) 48 ÷ 18 + 6 48 ÷ 24 = 2 Okay, now I'm gonna look . __________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~ °¨¨¨°ºOº°¨¨¨° Ann \| Pfeiffer \| Marcel Verdel Purcell \| Wylie \| Artie °¨¨¨°ºOº°¨¨¨°

04-07-2011, 02:40 PM	#21
Maxman YT Addict Join Date: May 2010 Location: Butler NJ Posts: 314	My head hurts! __________________

04-07-2011, 02:41 PM	#22
Rhetts_mama Donating YT 4000 Club Member Join Date: Apr 2010 Location: Georgia Posts: 5,959 Blog Entries: 1	Using PEMDAS to solve equations: Evaluating Algebraic Expressions Order of Operations/P.E.M.D.A.S. __________________ Don't get your knickers in a knot. Nothing is solved and it just makes you walk funny.

04-07-2011, 02:47 PM	#23
JeanieK Donating YT 12K Club Member Join Date: Jan 2006 Location: Council Bluffs Iowa Posts: 12,552	you always do the work in the parentheses first. Order of operations: The operations inside parentheses () and brackets [] are done first. Then any operations involving exponents (which you will learn about later). Then do all multiplying and dividing from left to right. Finally, do all addition and subtraction from left to right. Pre-Algebra: Basic Equations - Math for Morons Like Us 48 /2 (9+3) 48/ 2x12 24x12 288

04-07-2011, 04:58 PM	#29
AMD Donating YT 2000 Club Member Join Date: Nov 2006 Location: USA Posts: 8,986	Essentially the problem is 48/[2(9+3)]. You cannot split up the demoninator...solve the entire denominator before dividing. It's alot easier to see written as a fraction numerator on top of a demoninator instead of the "/" symbol. To get 288 as the correct answer, the problem would have to be written (48/2)*(9+3). Otherwise you cannot divide before solving your denominator.