48÷2(9+3)=?

[ElapidSVT]

personally i think people are confused by fractions

the way it's written is, as someone pointed out above, with the 2 being part of the denominator along with the (9+3) term and the 48 in the numerator.

48
_____
2(9+3)

it's not (48/2)(9+3) as google math does to the problem.

 

[ElapidSVT]

lol. i figured that out without doing the math.
your comment helped.
i <3 u

rofl...

 

[Kristi23]

My daughter is in honors algebra right now and her grades are always A's. I asked her to solve it. She said it was order or operations and they just went over it recently. Her answer was 2. She said the 9+3 first, then multiply by the 2 and then do the division. That is how it's done in her textbook.

She said if it was 48 ^2 x (9+3), the answer would be 288. Because there is no multiply sign, it has to be multiplied to the parentheis. 48 ^ 2(9+3) = 2

Being pressed against the parenthesis is the difference. It almost becomes part of it. I used ^ to show division instead of /.

 

[im faster]

My college professor says 288..

lol..

the world may never know

 

[Kristi23]

I'm going to ask my best friend. She's a college professor in chemistry and biology (not the basic first year classes). She and I went to the same high school.

My husband took algebra classes at different colleges in IL, too. He does have a degree.

I have noticed that teachers tend to forget the basics if they're not teaching them.

 

[Kristi23]

Maybe this will help (unedited pics)

The placement of the 2 is the difference. Also, you can't use a / or it thinks it's a fraction.

 

[Sunrise Reptile]

Here's more fuel for the fire. :main_evilgrin:

If you have MS Excel, type that formula, =48/2(9+3), in a cell then hit enter and see what you get. If it prompts you to auto-correct, let it.

Google is not flawless as you can see by all the results you get when searching that have no correlation to the topic...

That's funny, because when I typed the formula in the search box and hit enter, I only got one answer. So all the Microsoft Engineers and Google are wrong? Interesting... :main_rolleyes:

 

[Sunrise Reptile]

I think it's interesting that the people that answered 2 are all from the north and midwest. I wonder if it's been taught differently in different areas of the country?

I graduated HS in SD, and my answer was 288. :main_huh:

 

[Kristi23]

I'm going to ask my best friend. She's a college professor in chemistry and biology (not the basic first year classes). She and I went to the same high school.

My husband took algebra classes at different colleges in IL, too. He does have a degree.

I have noticed that teachers tend to forget the basics if they're not teaching them.

My bf said the answer is definitely 2. She was working on her phd until she got pregnant and is one of the smartest people I know.

 

[ElapidSVT]

my degree is in chemistry as well.
those chem folk are clever!

 

[Sunrise Reptile]

A math professor answered 288. That's all I'm gonna say. Y'all can argue 'til the cows come home. :main_laugh:

 

[Ehatcher]

Order of Operations. AKA PEMDAS, or if you are from the south.. "Please Excuse My Dear Aunt Sally"

Parentheses
48÷2(9+3) = 48÷2(12)

according to order of operations, the next step IS NOT 2(12), since the 2 is NOT inside the parentheses... the parentheses is now being used ONLY as a symbol for MULTIPLICATION, not HEY IM IN PARENTHESES, Im supposed to be done first! The problem is, in essense, now 48÷2(12) or 48÷2*12... or whichever is easier for you to understand that the parentheses is no longer part of the order in which the operation should be solved.

Exponent:

No exponent available

Multiplication and division: Whichever comes first, only when the two numbers being multiplied or divided are not in brackets TOGETHER.
48÷2(9+3)
48÷2(12) can also be written 48÷2*12
24(12) can also be written 24*12
288

Adding and subtracting: None available, problem is finished answer is 288.

*****EDIT*****

Adding validity

 

[Ehatcher]

the only way you could get 2 is if the equation was set up as follows
48÷(2[9+3])
48÷(2(12)) or 48÷(2*12)
48÷24
2

*****EDIT*****

adding validity

 

[Ehatcher]

personally i think people are confused by fractions

the way it's written is, as someone pointed out above, with the 2 being part of the denominator along with the (9+3) term and the 48 in the numerator.

48
_____
2(9+3)

it's not (48/2)(9+3) as google math does to the problem.

This is a simple left to right equation. No fraction bar is present.

If the orginal question was a fraction, you would be correct, Rob. If this equation was actually set up with the fraction bar it would be set up as

48
_____ =
2(9+3)

48
_____ =
2(12)

48
_____ = 2
24



in this instance, since no fraction bar is present, it actually IS (48/2)(9+3) .

 

[Ehatcher]

another example.

10÷2(5+6)
10÷2(11) or 10÷2*11
5(11) or 5*11
55

if it were set up with a fraction bar

10
____ =
2(5+6)

10
____ =
2(11)

10
____ = .4545
22

 

[ross88online]

It is always two two and two.