/sci/ - Science & Math

>Only for genius??
No.

There I solved it

>>9426920
2

>>9426920
3x6=18
3-18+2=-13

>>9426920
Is it really that common that people don't know BODMAS? It's taught in like 5th grade here.

>>9426954
I was taught PEMDAS but they are really just different names for the same system.

>tfw only 3% of the population has finished third grade

>>9426920
3 - 3 = 0
0 * 6 = 0
0 + 2 = 0
the answer is 0

>>9426920
op is genius - 100-98=3

>>9426948
this
only brainlets don't know you're supposed to multiply first

>>9426920
-13

>>9426920
-1/12

>>9426920

3-3x5+2 = ??

3-15+2 = ?^2

-10 = ?^2

Therefore: ? = i*sqrt(10)

>>9426920
>American education so backwards that solving an order of operations math is considered genius.

>>9427194
Wow you understand 5th grade order of operations. Congrats. Make sure you mock all the 4th graders that youre intellectually superior to as "brainlets"

>>9427172
Obviously he meant that even the lower third of geniuses can't solve it.

multiplication have scary ghost parentheses

>>9426920
BODMAS it up you faggots!

>inb4

>>faggot
>>why the homophobia?

>>9426920
3 - 3x6 + 2 = ??
3 - 18x + 2 = 2?
18x + 1 = 2?
x = (2? - 1)/18

>>9426920
-13

>>9427437
>?? = ? + ?
troggered

>>9426920
0x8=8

6 because the arrow is pointing from the 6 to the answer box

3 - 3x6 + 2 = x
3 - 18 + 2 = x
3 - 20 = x
-17 = x

herr derr I'll settle for 97th percentile.

>>9427662
Made me stop for a sec. Jej.

>>9426920
it's impossible, the result is a negative number

>>9426920
3-3x6+2=
3-18+2=
-15+2=
-13

>>9426920
-13 or -17 because you didn't use parens.
>>9427194
The ambiguity is from the addition and subtraction, not the multiplication, dipshit.

>>9426954
>>9426958
But neither of them will solve this problem without ambiguity because the order of operations doesn't tell you to add or subtract first.

>>9427366
>European education is so backwards that you think knowing the order of operations removes ambiguity from this problem

>>9427745
wow it is impossible cos negative nbers are shocking!!!

>>9427583
"Culture fair" IQ tests in a nutshell.

>>9426958
Exactly true, they mean the exact same thing.

>>9427662
>>9427834
>>9427839
When a problem does not use parantheticals then it is assumed th at you you solve from left to right as presented. As there is no other context to tell us that we should do something else, we solve left to right. Remember that "pemdas" and "bodmas" are three step orders of operations.

>>9427745
>it's impossible, the result is a negative number
Kek

>>9427858
>It is assumed th at you you solve from left to right as presented.
That's one fucked up sentence, but no, it's not. You might assume this because of your native language, and lots of computer programs assume this because of their parser implementation, but it is not a formal part of the order of operations.

>>9427834
>or 17

You sure you're on the right board fren?

>>9427892
3 - (3*6) + 2
3 - 18 + 2
3 - (18 + 2)
17
You're the one on the wrong board, buddy.

>>9427877
"Th at" should be "that" and my phone put "you" twice. If you couldnt parse it I imagine its due to your mongoloid nature. While it may not fit your definition of a "formal rule" its what the vast majority of children are taught and is considered to be the defualt whenever a problem is presented in a way that would otherwise leave ambuguity.

answer is false

>>9427837
Which is why along with pemdas you’re taught MD and AS as units and they’re to be done left to right

>>9427903
I clearly did parse it, hence my response, brainlet.

>>9427903
>>9427906
Kek, I'd love to see your attempts at solving recursive/stacked exponents.
Solve LTR : 2^2^3
Now type it into a calculator.

>>9427894
Doesn't substruction go before the addition?

>>9427914
>Solve LTR : 2^2^3
You said you could parse it, then you asked this thinking youre clever, revealing agin, your mongoloid nature.

>>9427920
Why would it? Subtraction is the reverse of addition, its the same operation, and therfore the same step.

>>9427925
then why is division before multiplication?

>>9426920
is it -13 or am I literally retarded?

>>9427930
Same response, you dont do division before multiplication, its the same operation only reversed so its the same step. The order of operations has three steps, not six.

>>9427930
it's not. you can do it from left to right or right to left.

it doesn't matter

ex. 2*3/6

(2 * 3)/6 = 1
2 * (3/6) = 1

>>9427922
Kek, you're too dumb to solve exponents.

>>9427944
>>9427936
>>9427914
As has already been said, if a problem still then leaves ambiguity you should solve from left to right, a problem should not leave such ambiguity, but again, when it does you should solve left to right.

>>9427894
It would be 3 + (-18 + 2)

You can't just slap parenthesis wherever you want.

>>9427944
At least that anon can read and/or follow a reply chain. You've clearly failed one or both of these things.

>>9427894
are you serious? where did you got that brackets? kek

>>9427894
How do you ended school if you think that addition has higher priority than substruction? They are equal!!

>>9428041
I think the program was called "no child left behind" even though a more accurate discription would be "everyone gets a certificate that says 'they gots the learnin done' even if they are litrally potatoes"

>>9426920
The answer is 6

>>9428104
Yeah? How so? Show your work .

>>9428174
Because the arrow says put 6 in the blank.

3-3=0 x 6=0+2=0 because you can't add, subtract, multiply or divide by 0. I always remember that rule in my head

>>9428213
U riht

>>9428227
You're fucking dumb, yes you can. If you multiply or divide by 0 it's zero, if you add or subtract is the same. My life you absolute brainlet

>>9426920
17
3x6=18
18-3=15+2
ALL YOU ABSOLUTE BRAINLETS LIKE WHAT IN THE WORLD MAN

>>9426920
Anyone that didn't get 17, leave this board. Please, I beg of you.

>>9426920
It's 2 you retards negative numbers don't count

>>9426920
3-3x6+2
3-18+2
5-18
-13
I win.

>>9428262
>negative numbers don't count
This is whe grist for our malady mill known as /pol

Did I go to the only school that taught PEDMAS but also added that addition and substraction are actually the same tier and should be done left to right

>>9428248
Fuck you, go back to elementary school!

>>9428325
No, lol. PEMDAS is only three steps and the "left to right" part on applies if the question would otherwise be left ambiguous, which it should not be. PEMDAS is more like PE,MD,AS. If anyone tries to confuse you with "BODMAS" or something it means the exact same thing. MD are just the same operations forward and backwards, same is true for AS.

3-(18+2) = 3+(-18)+(-2)
(3-18)+2 = 3+(-18)+2

>>9426981
>0+2 = 0
guy...

>>9426920
acording to my 137 iq the answer is "?"
think about it

>>9426920
x=(5-??)/18

correct?

>>9428227
What the fuck. There is so much wrong with you.

>>9428447
Actually it is P,E,DM,AS.

>>9428262
Boy, wait 2 years, when you will leave elementary school, they should teach negative numbers.

>>9429266
No its not, google it.

>>9427914
Isn't it just 2^8? Answer being 64.

Its zero if you do it the common core way, and -13 the PEMDAS my. My school taught both.

>>9426920
6

>>9426920
do people really not understand subtraction wtf

>>9429643
>2^8 = 64
genius detected

>>9428248
You cannot divide by 0.

>>9429598
>P and E are equal
So you're saying

2^(2+3)
= 2^2 + 3
= 4 + 3
=7
?

>>9428270
Trying to convince us that negative numbers are really a thing.

>>9430192
1. exponents and roots
2. multiplication and division
3. addition and subtraction
These are the steps of the order of operations, subhuman.

>>9430192
Mnemonics are often used to help students remember the rules, involving the first letters of words representing various operations. Different mnemonics are in use in different countries.

In the United States, the acronym PEMDAS is common. It stands for Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. PEMDAS is often expanded to the mnemonic "Please Excuse My Dear Aunt Sally".
Canada and New Zealand use BEDMAS, standing for Brackets, Exponents, Division, Multiplication, Addition, Subtraction.
Most common in the UK, India and Australia are BODMAS meaning Brackets, Of or Order, Division, Multiplication, Addition and Subtraction. Nigeria and some other West African countries also use BODMAS. Similarly in the UK, BIDMAS is used, standing for Brackets, Indices, Division, Multiplication, Addition and Subtraction.
These mnemonics may be misleading when written this way. For example, using any of the above rules in the order "addition first, subtraction afterward" would incorrectly evaluate the expression

10 − 3 + 2.

The correct value is 9 (and not 5, as if the addition would be carried out first and the result used with the subtraction afterwards).

>>9430330
>>9430341

I know the order of operations retards, >>9428447 said that parentheses (brackets) and exponents (order, indices) are equal.

Parentheses have priority over everything, that is literally their purpose. If exponents were equal to parentheses then basic maths goes to shit.

Take 2^(2+3) using his rules as an example.

>1st take parentheses and exponents, ordered left to right
2^(2+3) => 4+(3)
>2nd take multiplication and division, ordered left to right
there is no multiplication or addition
>finally take addition and subtraction, ordered left to right
4+3=7.

2^(2+3) isn't equal to 7 though, it is equal to 32 because parentheses have priority over exponents. Here is how we actually do it

>1st do whatever is inside the brackets
(2+3) = 5
>2nd do exponents
2^5 = 32
>no more operations to do
2^(2+3)=32

Are those of you who are arguing over order of operations still in middle school, or are you just special needs? You are missing the problem completely.
Do the multiplication first so that it becomes
3-18+2
From here, we have 2 options which is what you are getting caught on. We can either subtract first, or add first like so.
3-(18+2)
(3-18)+2
Just think about this for ten seconds please, and you will see that these are equivalent to the following
3-(18+2) = 3+(-18)+(-2) which is wrong
(3-18)+2 = 3+(-18)+2 the correct equation
Please don't make me explain this further.

>>9426920
Take this Facebook crap out of here.

>>9426920

Another meme pic for low self-esteem engineers

True master race mathematicians know why there's room for ambiguity.

> get rekt kid

How exactly does 3 subtract fifteen result in negative ?
>15 apples
>take 3 away
>now in debt 13 apples

>>9429643
lmao

>>9430330
man, are you serious?

>the current state of /sci/
Terrible, you completely fucked your trolling up. You're supposed to include a visually ambiguous division operation so that you can maintain plausibly deniability and call any answer wrong.

>>9432636
>Implying I didn't

Ok.

>>9426920
7

>>9427837
Left to right, like literally everything in the western world.

>>9426948
This is correct

>>9427894
This is wrong. Subtraction and addition are equal precedence therefore you go left to right. The answer is -13.

>>9433208
Addition and subtraction can be done in any order you fucking retards. The problem arises when you add 2 to -18 you get -16 and not -20. Then you add 3 to -16 and you get -13.

>>9426920

Why dont they use brackets.

>>9433235
Because failing to communicate clearly makes idiots feel smart.

>>9428358
Lol, can't even argue with me.

>>9430144
Yes you can, it's just zero, like with multiplying. Like I said, you idiot.

3 + (-3) * 6 + 2
3 + (-18) + 2
-13

>>9427894
>3 - 18 + 2
>3 - (18 + 2)

>>9426920
3-3*6+2
=-3*6+5
=-18+5
=-13
is how I would do it
Combine like terms

3-3x6+2 = y.
3-18x+2 = y
18xy = 6
xy=1/3
y = 1/3x

Answer: 1/3x.

>>9426920
-13

Holy fuck guys the answer is -13. say you start off with 3 dollars. You have a debt of 18 which is 3×6. You make a payment of 3 dollars which brings your debt to 15. Say you find 2 more dollars later to pay your debt so it brings it down to 13. You owe 13 dollars. If this just confuses you just put it in a calculator there is no shame yo

>>9433856
>there is no shame
There is an unbelievable amount of shame in needing a calculator for this

>>9433763
what a massive dicknoozle you are

>>9427341
you squirt? nice...

>>9427837
>>9427906
>>9433194
>left to right
Brainlet-tier.

When you're done with all operations except for addition or subtraction, just add all integers. Forget going left to right.

B-rackets
I-ndicies
D-ivision
M-ultiplication
A-ddition
S-ubtraction

3-((3*6)+2)
=-17

>>9427834

>>9426981
This made my day

3-3x6+2
= 3-18+2
=-13

>>9426920
i

>>9426920
3-3×6+2 = exp(sin(arg(1+i)))

>>9426920
-6.5. The question marks are algebraic variables.

>>9426920

-13 if you're not tricking me...

>>9426920
this has reminded me that I should remember the basic things like signs hierarchy.

thanks OP but you are still a faggot.

>>9426920
Is "x" a multiplication symbol or a variable?

>>9436306
Yes

The answer is -13. You should've learned this in at least highschool.

>>9426948
phew I was a bit stressed.

How about this one: A bat & ball cost $1.10. The bat costs a dollar more than the ball. How much does the ball cost ?

>>9426936
Only correct answer for this post

>>9435614
B-rainlets
I-diots
D-ingus
M-orons
A-ssholes
S-hitposters

>>9439217
the same as your mom charges for anal, a nickel

>>9439217
X + Y = 1,1
Y = X+1
2X+1 = 1,1
X=0,1/2 = 0,05 cents

>>9439229
mom doesnt charge for anal

>>9439230
Half of Princeton, MIT & Harvard students asked got this wrong

>>9439244
haha what memery is this? What mistake did they make?

>>9426981
Anon you made me laugh hard.

> such obvious bait
> all these replies
> the amount of retards in the replies
Not as if I liked this board anyway

>>9439256
89% of world leaders get this wrong, too

>>9426920
>Arrow pointing from "six" to the blank after answer

Is the answer six...?

>>9426920
>98% fail this test.
>Fitting as only like 3%

good 98+3=100 now

>>9439510
Just because Drumpf got it wrong doesn't mean other leaders are dumb
BLM 1 - wypepo 0
Checkmate nazis

anyone that says that otakus are dumb watch this: the answer is 2

>>9427894
[math]
(-1) \cdot 2 = 2
[/math]

>>9427920
There is no such thing as "subtraction" in a field, what grade are you in?

>>9439510
So there’s a correlation between corruption and stupidity?