/sci/ - Science & Math

The first one comes out as zero and the other one is 2.5 I think.

first is 2
second is 4.5

>The first one comes out as zero and the other one is 2.5 I think.

I hope you are trolling,
first:2
second:6.5

2 - 3 + 1 * 3
2 - 3 + 3
2 + 0 = 2

4 * 2 - 3 / 2
8 - 3 / 2 = 6.5

Why so easy.

>>2788819
But anything multiplied by 0 comes out as 0.

please excuse my dear aunt sally

-4
6.5

Not OP here but have to post here since I'm at the uni library. How do I simply a radical in a radical?

3 radical 3 radical 1

>>2788871
2-3 comes before +1*3

>>2788884
curse my American education

2-3+1*3
=2-3+3
=2

4*2-3/2
=8-1,5
=6,5

There, PROOF. Not so hard, is it?

(Division and multiplication first, guys.)

>>2788895
Why have you done it in the wrong order?

Where are people getting multiplication by a zero?

It's prolly best that I don't know how you did that.

>>2788948
Well 2-3 is -1 and then you have to add 1 which brings the total to 0 and finally you have to multiply by 3, so it stays as 0.

>>2788979
It isn't +1
It's +1*3


captha:
simplicity havello

>>2788979

rofl no.... try again

/sci/ - Science & Math

easiest board to troll on the planet

>>2788979
>>2788979
>>2788979
>>2788979
>>2788979

>PEMDAS
/THREAD
>>2788979

>My face when people don't understand order of operations
>My face when people think parentheses are "brackets" or that they are the same thing and interchangeable
>My face when people think multiplication always comes before division or that addition always comes before subtraction just because of the order of PEMDAS
>My face when people don't understand what it means to read the equation right to left

>mfw people haven't been trolled by this thread before

>>2789607
Why is it wrong?

(brackets)>everything else red in sequence

The order of calculation within a calculator!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! YEAH? Let's all be computers :D

>>2789696

see

>>2789616

>>2789755
But that post does not even have an answer and I do not know what 'PEMDAS' is.

>>2789776
PEMDAS is the order in which you do operations.

P (Parentheses, sometimes called "Brackets")
E (Exponents
MD (Multiplication and Division, you do which ever comes first when reading an equation left to right. You do NOT always do multiplication before division, an example being 2 / 4 x 3, you divide 2 by 4 and then multiply that ans by 3)
AS (Addition and Subtraction, same rules apply from Multiplication and Division, you add or subtract depending which comes first when reading an equation left to right.)

>>2789805

Why not just work out the whole thing from left to right?
What are exponents?

>>2788843
>2 - 3 + 1 * 3
>2 - 3 + 3
>2 + 0 = 2
You are lucky that what you got is the same as the answer, even though you did it wrong.

You added the +3 to the -3 in your step (2 - 3 + 3) to get 2 - 0, even though you're supposed to subtract 3 from 2 first to get -1, and then add the +3 to get 2.

order
of
operations

>>2789822
filtered, learn math and science before discussing math and science

>>2789840
I know a little bit of maths. What is filtered?

So /sci/ kids, who are supposed to be nuts about physics and mathematics, don't even remember order of operations from grade school?

Seriously?

I weep for our future.

>>2789868

>implying Harriet is a /sci/ kid
>implying youre not a vapid hipster faggot

>>2789868
Most of these guys know of or have at least heard of order of operations, it's just that it was never drilled into them that you don't always do multiplication before division or addition before subtraction.

Really, it can be PEMDAS

or PEDMAS
or PEMDSA
or PEDMSA

It's all dependent on how the equation is read left to right.

>>2789805
ahhhh, Mind changed.

What are exponents please?

2
6,5

>>2789905

Exponents are the superscript numbers above a number. We write them as 10^6 which means

10*10*10*10*10*10

An exponential figure multiplies itself by that same number.

If someone can illustrate with a jsmath version. I disabled it due to aggregate trolling on this board from /x/ and other assholes.

implying the x isnt a multiplier, but the X you should find.

>>2789905
exponents is almost an acronym for multiplying a number by itself

If I want to do:
5 x 5 x 5

I can use an exponent to denote that as 5^(3)

5^0 = 1
5^1 = 5
5^2 = 5x5
5^3 = 5x5x5

And so on. You're either a kid from a third world country, an idiot, or a troll.

Thanks
Shouldn't 5^0 be 0, not 1?

>>2789940
It's 1.

Anything to the zero'th power is 1. Note that saying 5^0 is NOT saying 5 x 0.

>>2789940
You thick?

>>2789947
I figured if 5^4 = 5X5X5X5, then 5^0 would just be nothing at all. No 5's

I am not very good at maths, but can people stop being mean about it please?

>>2789983
>5^0 is 1.
>But wouldn't it be 0 if 5^0 is 0?
>5^0 is 1.
>But shouldn't it be 0?
>5^0 is 1.
>It really should be 0!!!!!!!!
>You are an idiot
>Stop being mean please!

>>2789983

Its ok Harriet, Dont pay attention to that. If you are really curious about relearning math. Khanacademy.org has a great way of showing people math skills they may need to brush up on or even relearn which might be your case. Generally most of us are pretty helpful but others see this as an attempt to troll. I wont make any judgements either way but you should attempt to do things on your own to maximize your learning potential.

Thankyou.
I have seen this website before; my housemate showed it to me.

>>2789928
> almost an acronym

>>2789983
Allow me to jump in
Think of division as multiplication by a negative exponest (example: 2/3 equals 2*3^-1, in another words a/b = a*b^-1, because they can be writen as 2^1/3^1 or on the second example a^1/b^1) thus if we know that a/a = 1, we know that a^n/a^n = 1, and a^n/a^n is a^n * a^-n = 1, then a^n * a^-n = a^0 = 1.

/sci/ - the easiest bored on 4chan to troll

>>2790024
I couldn't really follow that, but I will take your word for it.

You should all put this in your facebook status, You will crack a few laughs.

>>2790016

Cool - So all you have to do is signup on the top corner and it'll track your progress and quiz you accordingly on different subjects in the tree. Good luck.

>>2790029

>/sci/ - the easiest bored on 4chan to troll
>easiest bored to troll
>bored troll

>>2790041
Cool, thanks Max. :)

>>2790045
Well then, let me try again...
First think any number without an exponents is the same as having an exponent of 1, example 2 is the same as 2^1.

Now think of division as being being multiplying something by their negative exponent, example: 3/2 is equal to (3^1)/(2^1), thus it is the same as (3^1) * (2^-1).

When you multiply or divide numbers that are equal their exponents are added to each other, example: 3^1 * 3^1 = 3^2 (because 1+1=2), 3^2/3^3 = (3^2) * (3^-3) = 3^-1 (because 2 - 3 = -1).

Now if we pick two numbers that are are the same to the same exponents and divide them we know they equal to one, example: (3^2)/(3^2) = 1, another (3^1)/(3^1)=1, 3/3=1.

Now considering that division is multiplication by a negative exponent we have: (3^2)/(3^2) which is the same as (3^2)*(3^-2)=1 (and by adding their exponents we have 2-2=0) thus (3^2)*(3^-2)=3^0=1, in another words it is the same as dividing a number by itself, any number "x" divided by itself will be equal to 1, x/x=1, which is the same as (x^n)/(x^n)=1, which is the same as (x^n)*(x^-n)=1, and because n^-n=0 we have x^0 which equals 1, x^0=1, being x any number.

Otherwise you might watch it on the khanacademy.org, as the probably explains better than me ;)

i don't know who, but someone in this thread gets 10/10
not because it was a good one, but simply because all of you fell for it

>>2790144
meant n-n=0 (or in different words n+(-n)=0)

Why are there so many replies to this thread

Left, right, BEMA (brackets, exponents, multiplication/division, addition/subtraction).

2-3+1*3=2-3+3=2
4*2-3/2=8-1.5=6.5

>mfw people don't remember order of operations
>mfw people don't understand n^0
>mfw I don't have a face

>>2790203
Because math is fun?

^-^

>>2790218
Math is tedious -- it's not fun.
I don't understand why there is such a big fuss being made over such simple problems

>>2790225
No it is like puzzles, one huge puzzle where everyone joins in, puzzles that find out how to do cool things like make sports cars or strategies for football games and the person who finds the answer gets money rewards from one of America's great multi-national corporations to spend on bitches who aren't worth it.

It's the shit.

>>2790245
The math itself isn't beautiful -- its applications are
Math is a tool

>>2790144
I think I understand it now. Thanks very much.

>>2790250

>ALL MY FUCKING RAGE.

DIE YOU FUCKING SHITCUNT.