I need help! FAST! PLZ HELP!

[Raptor22]

Whats 2 + 2 - (3 x 7) + 85 x 67

[crusty]

5,984 is thoust answer.

[Galactus]

4556. Why not just use a calculator? Since you're online, ya know google has a built in calculator.

And how'd you get that answer crusty?

2+2 = 4
3*7 = 21

4 - 21 = -17.

-17 + 85 = 68.

68*67 = 4556.

[Danielle]

Order of operations Psydd

PEMDAS

Parenthesis
Expontents
Mulitipy and Divide
Add and Subtract.

So the answer is 5984

[h00pla]

To remeber PEMDAS just remember

Please
Eat
My
Dear
Aunt
Sally

[Danielle]

for us it has always been: Please Excuse my Dear Aunt Sally but i guess things are just different.

[h00pla]

yeah but my teacher decided she wanted to give us a laugh so she said eat

[Galactus]

Pemdas Shmemdas. Shows ya how long it's been since I took a math class.

[h00pla]

That might not be a good thing. Do you know the quadratic theorem

[Galactus]

Not ringin' a bell ;)

How is it a bad thing? I know what I need to know to function in society. They teach you loads and loads of crap in school that you'll more than likely never use in your life.

I can't think of a single thing I do that ranges beyond simple division in my everyday life.

[h00pla]

i dont know. i might pursue a career in something like nuklear physics so i need to know stuff like that and even worse stuff

[crusty]

4556. Why not just use a calculator? Since you're online, ya know google has a built in calculator.

And how'd you get that answer crusty?

2+2 = 4
3*7 = 21

4 - 21 = -17.

-17 + 85 = 68.

68*67 = 4556.

You forgot about order of operations. Anything in parenthesis goes first.

[crusty]

Oh, sorry, didn't see previous posts.

[Galactus]

Okay, maybe it has been far too long since I took a math class, but I still don't follow how you folk get what you're getting.

Could ya break it down for me? Going through it following the 'order of operations,' I still get a number different from yours.

Here's what I got. First, in parenthesis, 3*7=21. Next, in multiplication, 85*67=5695. Then addition and subtraction, 2+2=4; 4-21=-17; -17+5695=5678.

So if you would, please educate me.

And when I put 2+2-(3*7)+85*67 into google, it comes out to that answer as well. As reference, see http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=2%2B2-%283*7%29%2B85*67&btnG=Google+Search

[Doh]

Huh, Pemdas, never heard of that one. We use

Bedmas

Brackets
Exponents
Division
Multiplication
Addition
Subtraction

Lol.

[Danielle]

psydd, you are right with that answer. I had used a lovely calculator and then accidently closed it so i didnt remeber the answer. I assumed that crusty was right.

[Galactus]

Thanks, Danielle, you're always very helpful.

[h00pla]

I finaly did the probl;em and got 5,712

first i multiplied the 3x7 then multiplied the 85x67 anhd added them together then subtracted four

[corkysucks22]

i am pretty sure the anwer is 5678

[crusty]

2 + 2 - (3 x 7) + 85 x 67

2+2-21+85x67

2+2-21+5695

4-21+5695

-17+5695

5678

I got a different answer this time.. :|

[h00pla]

well you have to add the 21 with 5695 not with 4

[crusty]

No. You don't.

4 - 21 + 5695

PEMDAS. Yes, Subtraction is last, but both subtraction and addition go together, in a way.

If you have 3-2+1, you just do it left to right.

That's what I did.

You are wrong.

I am right.

[h00pla]

no if you do it left to right 3-2+1=2

but if you follow pemdas the answer is 0

the order was put that way for a reason. . . follow it

[Danielle]

no. Multiplication and division go together nad addition and subtraction go together. You do those operations from left to right. Ex-

4/2+6*7-5

4/2=2

2+6*7-5
6*7=42

2+42-5
2+42=44

44-5=39

39 would be the correct answer.

[h00pla]

yes that is the answer i would have come up with as the additoin still was on the left side of the equation instead of substracion. but in all reality my algebra 2 teaching has taught me to just act as if subtracting is adding a negative so you basically combine like terms

[Diamond187]

Think of it this way, by the same logic that
3-2+1=0

-2+3+1=-4
which makes no sense at all, because then
-2+3+1=-(2+2)
which reduces to 4=-2 by cancelling the -2s.

[The Brown Cow]

You can't cancel those 2's, thanks to the addition sign in the parentheses.


You add and subtract from left to right.

[h00pla]

just think of it as a hole. when you combine a positive with the positive you add more dirt, when you combine a negative you are atakkinbg away dirt no matter how you do it the hole will end up as woulkd have another way