6÷2(1+2)=?

reply to post by BadMagician


Hey if we cant even get grade school math right then how are we supposed to solve the advanced metaphysics issues??

I can't believe so many people are getting this wrong. You have to do PEMDAS. It's the order of operations. Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. That's the order of operations.

6/2(1+2)

It's not (6/2)(1+2), which would be 9. It's 6/2(1+2). You have to do the parentheses first. That makes the expression: 6/2(3). You have to do the 2*3 first, because this is a fraction. It's 6 OVER 2*3. Not 6 over 2, times 3. 2*3 is 6, so now you have 6/6. That equals 1.

Basic math, folks.

Originally posted by OrphenFire
I can't believe so many people are getting this wrong. You have to do PEMDAS. It's the order of operations. Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. That's the order of operations.

6/2(1+2)

It's not (6/2)(1+2), which would be 9. It's 6/2(1+2). You have to do the parentheses first. That makes the expression: 6/2(3). You have to do the 2*3 first, because this is a fraction. It's 6 OVER 2*3. Not 6 over 2, times 3. 2*3 is 6, so now you have 6/6. That equals 1.

Basic math, folks.

Again, false. Its not a fraction. Its 6 ÷ 2 x 3, in order.
I give up attempting to explain this...

Originally posted by ASeeker343

Originally posted by OrphenFire
I can't believe so many people are getting this wrong. You have to do PEMDAS. It's the order of operations. Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. That's the order of operations.

6/2(1+2)

It's not (6/2)(1+2), which would be 9. It's 6/2(1+2). You have to do the parentheses first. That makes the expression: 6/2(3). You have to do the 2*3 first, because this is a fraction. It's 6 OVER 2*3. Not 6 over 2, times 3. 2*3 is 6, so now you have 6/6. That equals 1.

Basic math, folks.

Again, false. Its not a fraction. Its 6 ÷ 2 x 3, in order.
I give up attempting to explain this...

Then the expression is faulty. Both answers are correct because the expression does not place parentheses. If 9 is to be correct, you have to place the 6/2 within parentheses, to make (6/2)(1+2). Otherwise, you place the entire problem within parentheses (which you can do to any expression or equation) to make (6/2(1+3)) which, once again is a fraction and the answer will be 1.

Originally posted by OrphenFire

Originally posted by ASeeker343

Originally posted by OrphenFire
I can't believe so many people are getting this wrong. You have to do PEMDAS. It's the order of operations. Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. That's the order of operations.

6/2(1+2)

It's not (6/2)(1+2), which would be 9. It's 6/2(1+2). You have to do the parentheses first. That makes the expression: 6/2(3). You have to do the 2*3 first, because this is a fraction. It's 6 OVER 2*3. Not 6 over 2, times 3. 2*3 is 6, so now you have 6/6. That equals 1.

Basic math, folks.

I give up attempting to explain this...

Then the expression is faulty. Both answers are correct because the expression does not place parentheses. If 9 is to be correct, you have to place the 6/2 within parentheses, to make (6/2)(1+2). Otherwise, you place the entire problem within parentheses (which you can do to any expression or equation) to make (6/2(1+3)) which, once again is a fraction and the answer will be 1.

I would agree that it is faulty, or at least poorly written. At first glance I assumed it was 6 over everything as well. If you follow order of operations properly though you should always get 9. Multiplication and division left to right. 6÷2*3. If you get 1 you are assuming parentheses that arent there.

This thread is epic. It's 9 unless you add more parenthesis or went to a bad school/didn't pay attention. Unless I am an idiot I am pretty certain this is true.

Originally posted by JackyMenace
This thread is epic. It's 9 unless you add more parenthesis or went to a bad school/didn't pay attention. Unless I am an idiot I am pretty certain this is true.

^^Yes This^^

And this thread is epic. I'm avoiding semester final projects by arguing over algebra. Epic Indeed

Originally posted by _BoneZ_

Originally posted by Itop1
already half of you put 9 and half of you put 1, so which is it, 1 or 9?

The answer is 9. Use my method above:

Please Excuse My Dear Aunt Sally

Please -- Parenthesis
Excuse -- Exponents
My ------- Multiplication
Dear ----- Division
Aunt ----- Addition
Sally ----- Subtraction

After the parenthesis read the equation from left to right. If you can read english you get 9 if you read right to left you get 1. The answer to the equation is 9, no further discussion is needed. It doesn't get any simpler than the example shown. If you do not understand I suggest you get a pre-algebra text book, read and practice. Just like in the third grade.


6÷2(1+2)=

You do the Parenthesis first, so

6÷2(3)

There are no Exponents or Multiplication just yet, so 6÷2=3:

3(3)

The above is the same as 3x3, which = 9.

Your answer is 9.

reply to post by Itop1


You add the numbers in the parenthesis first, though the answer is nine.
It would go;
6/2(2+1)
6/2(3)
Now, here is where I'm not sure, I think that the 6/2 would go first since it could be re-written as 6 / 2 X 3.
So, 6/2 is 3.
3 x 3 is nine. Tah dah!
I think that it would be out of the order of operations to multiply 2 by 3 before the division of six.
Thats what I think.
Peace!

Thats why the big boys don't use ÷ anymore.

9

Originally posted by OrphenFire

Originally posted by ASeeker343

Originally posted by OrphenFire
I can't believe so many people are getting this wrong. You have to do PEMDAS. It's the order of operations. Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. That's the order of operations.

6/2(1+2)

It's not (6/2)(1+2), which would be 9. It's 6/2(1+2). You have to do the parentheses first. That makes the expression: 6/2(3). You have to do the 2*3 first, because this is a fraction. It's 6 OVER 2*3. Not 6 over 2, times 3. 2*3 is 6, so now you have 6/6. That equals 1.

Basic math, folks.

Again, false. Its not a fraction. Its 6 ÷ 2 x 3, in order.
I give up attempting to explain this...

Then the expression is faulty. Both answers are correct because the expression does not place parentheses. If 9 is to be correct, you have to place the 6/2 within parentheses, to make (6/2)(1+2). Otherwise, you place the entire problem within parentheses (which you can do to any expression or equation) to make (6/2(1+3)) which, once again is a fraction and the answer will be 1.

Epic math fail.
You are supposing there are parentheses where there aren't any. I could send you my kids mathbook if you need it. ?

my computer says:

6 / 2 * (2 + 1) = 9
(6 / 2 * (2 + 1)) = 9
(6 / 2) * (2 + 1) = 9

wow!!

how many ATSers does it take to do a simple math problem...

I was a Math teacher for 8th grade algebra...

PEMDAS

Parenthesis
Exponents
Multiply
Divide
Add
Subtract

6 / 2(1+2) parenthesis first

1+2 = 3 done

6 / 2(3) Multiply

2*3= 6 done

6/6 = 1 divide... done

Seriously, my heart is broken that this has required an entire thread. This is why America is weak. And please don't use your computer or TI-83... computers are only as smart as the user.

Originally posted by Whatsreal
wow!!

how many ATSers does it take to do a simple math problem...

I was a Math teacher for 8th grade algebra...

PEMDAS

Parenthesis
Exponents
Multiply
Divide
Add
Subtract

6 / 2(1+2)

1+2 = 3

2*3= 6

6/6 = 1

Seriously, my heart is broken that this has required an entire thread. This is why America is weak.

Why did you multiply before you divided? That action is inserting parenthesis that arent there. The division should be done first.

Originally posted by Whatsreal
wow!!

how many ATSers does it take to do a simple math problem...

I was a Math teacher for 8th grade algebra...

PEMDAS

Parenthesis
Exponents
Multiply
Divide
Add
Subtract

6 / 2(1+2) parenthesis first

1+2 = 3 done

6 / 2(3) Multiply

2*3= 6 done

6/6 = 1 divide... done

Seriously, my heart is broken that this has required an entire thread. This is why America is weak. And please don't use your computer or TI-83... computers are only as smart as the user.

edit on 1-5-2011 by Whatsreal because: Edit for better instructions

Finally! Somebody with credential who backs distributive law!

i guess no one click my external image if people still says 1... even teachers.
how you can say 1 while computer calculating 9??
are you alien? 16 core brain?

This should sum things up... In the case that parentheses are used, instead of an 'x', they get a higher importance within an equation than standard multiplication / division rules. This example is has a similar equation with division and multiplication mixed and is found as the last example on the page linked to below.

This next example displays an issue that almost never arises but, when it does, there seems to be no end to the arguing.

Simplify 16 ÷ 2[8 – 3(4 – 2)] + 1.

The general consensus among math people is that "multiplication by juxtaposition" (that is, multiplying by just putting things next to each other, rather than using the "×" sign) indicates that the juxtaposed values must be multiplied together before processing other operations. But not all software is programmed this way, and sometimes teachers view things differently. If in doubt, ask!

Last example on page: Link to Source

Originally posted by ASeeker343

Originally posted by Whatsreal
wow!!

how many ATSers does it take to do a simple math problem...

I was a Math teacher for 8th grade algebra...

PEMDAS

Parenthesis
Exponents
Multiply
Divide
Add
Subtract

6 / 2(1+2)

1+2 = 3

2*3= 6

6/6 = 1

Seriously, my heart is broken that this has required an entire thread. This is why America is weak.

Why did you multiply before you divided? That action is inserting parenthesis that arent there. The division should be done first.

NO!!!! you get an F for today... I am a certified math teacher.. I'm not inserting parenthesis that aren't there as they are already there...

and PEMDAS... M before D.. multiple before divide... THINK BEFORE YOU SPEAK. Don't speak if you don't know.... man... no wonder the rest of the world laughs at us... kids in elementary school know this in most european countries.

MULTIPLY BEFORE DIVIDE... got it?

I just tried every calculator I could find...

All of them come up as 9. Scientific calc? 9... so, either every calculator in the world is wrong (meaning that every human that has done math to MAKE calculators possible is wrong as well).

Just doesn't seem plausible that every engineer who's ever designed a calculator could've been wrong on this one equation.

I got 9, and every calculator I've tried is agreeing with my math at 9... I'm going with 9.