1+1 = 1.999999...

[RealityDysfunction85]

you draw nines funny

[MarineFocus]

Okay guys, if what he's writing is 2 = 1.99999... repeating to an infinite number of 9s, he's ACTUALLY right.

People who disagreed aren't necessarily dumb, they just haven't taken first year university math proof courses...

Here's a "simple" proof:

In order for 2 numbers to be different, there has to be a number between the two. i.e 2 and 3 is different because there's 2.5 or 2.6 in between. Test it yourself. Agree?

Now, is there a number in between 1.9999 infinitely repeating and 2?

[syeddawdye747]

you dumbass you let x=0.9999 ? why ? x=1.00 and 1.99999 is very close to 2 if not 2!

you did some mathematics letting x=0.9999 for no reason, you are smarter than any math professor!!!!!

[andyflamer]

stop writing G's!

[BeatlesRBest1]

The only thing you proved is that you have the handwriting of a 4 year old

[deleteaman]

uhhh... 9x = 0.99 forever.. I dont think thats right

[supersoni360]

one apple. plus one apple. equals two apples. i win.

[1Deejay7]

@supersoni360 LOL

[Thelones]

1+1= 1,999,999,999etc? Are you using a fucking comma or a dot make it clear it's very important in math.

[Cooprocks123e]

@Thelones The dude lives in Slovenia so it's probably just the way he learned it.

[walhawks7]

You have one apple. Someone gives you another apple. You now have 2 apples. Not 1.999999...Dumbass.

[XxCalypsoxX616]

@walhawks7

Not sure if trolling...

Or just stupid...

[Applecrazy12347]

You write funny....

[Dave2170]

Here is a faster proof:  If a = b, then a x c = b x c (basic algebra) So if 1/3 = 0.3333...repeating, then 1/3 x 3 = 1.0 = 3 x 0.3333... = 0.99999... I think the math gods are telling us that at some point your close enough to being there.

[TheGreatSpaceChaseHD]

@Dave2170 where the hell did c come into the equation

if a = b then ax"c" =....what is c, that is not basic algebra that is you making up numbers

[Dave2170]

@TheGreatSpaceChaseHD Well, I was typing fast. The formula is the other way round: If a x c = b x c and c does not equal zero, then it has been proven that a = b which is what I showed above. a = 1/3, b = 0.3333, c = 3. Viewed another way: we agree that 1/3 = 0.3333...; if I multiply both sides by a constant like 3, the equation stays equal. So, 3 x 1/3 = 3 x 0.3333... or 1 = 0.9999...repeating.

[TheGreatSpaceChaseHD]

@Dave2170 much better, just thought i would correct you on that :P

[roel433]

you have 1 apple, somebody gives you another apple, and suddenly you have 2 apples with a little pieces out of it yes ,..

[concept015]

what kind of mental illness do you have

[TeodoroRyan]

what kind of a pen is that

[happygoturtle]

do something useful with your time....who cares if this was true or not. ...WTF

[19copilot]

So much work for no credit XD

[rogman1000]

X is a number??

and where does .9999... come from?

from what i learned in elementary school you dont need variables to solve 1+1

[Vier5502]

@rogman1000 X is not a number, it is a variable, one that has been used correctly here (seriously? seriously? are you fucking kidding me?). Wow. Wooooow. This is elementary algebra. Literally. Why don't you do us *all* a favour and take yourself out of the gene pool, hm?

[rogman1000]

@Vier5502 I know X is a variable i just dont understand where it comes from in the equation 1+1 and how is it valid to assume X=.9999?

[Vier5502]

@rogman1000 *facepalm* If you know that X is a variable...you..also..should..­know..that..you..can..let..num­bers..be..equal..to..the..vari­able..........................

You *cannot* be this stupid. You just cannot be. You must literally be mentally challenged to not understand this.

Let me explain slowly. The hypothesis is 1+1=1.99, because 1=.999. He gives a mathematical solution that, supposedly, shows this. Period. End of story. You are sooooo stupid. Wow.

[rogman1000]

@Vier5502 Wow do you even understand what im trying to ask? Thats basically what im asking why would 1= .999 it just doesnt make any sense in which to add the extra steps in the proof but i guess like Parkerkun said he's just trying to troll us. Its like saying numbers (irrational or not) are EQUAL other numbers that are they are infinitely close to.

[Parkerkun]

@rogman1000 Protip: It's a troll video.

[silver908robloxguy]

My brain hurts

[LISTER987ify]

so in other words, 100/3=33.333333 and 99.999999/3=33.33333333

[Giilfer]

1+1=11 !!!! What are U Saying !! :p

[ViniciusMeres]

I did it! i just dont understand anything! '-'

[MrTan9524]

so 1+1=3 right my boss owes me some money lol where as you have been overpaid by 0.1% now whose maths s better

[Vize526]

If you multiply 0,(9)x10, you get 9,(9) with one less 9 in the fractionary part on the number. So, if you subtract 0,(9) to 0,(9)x10, you get 8,(9). Divide that number for 9, and the result is once again 0,(9)...

[lazorize]

1+1=2 im that fucking smart

[TakeItBySurprise]

so you proved that 1 + 1 is infinitely close to 2. In other words, you proved that 1 + 1 IS 2, because to be infinitely close to something is equivalent to being that thing. Bravo :P

[INteNsEHaXx]

lmfao this is a topic covered in regular pre-calculus classes

[DanLapko]

fake 'n' gay

[jmarin164]

que estupidez

[MrSchuschi]

i think this is wrong, cause if you use this theory

0,9 + 0,9 is 1,8...

please, when you make so things, make them right...!

[AtomicMonkizzle]

u idiot that would mean 1+1=1.8

[nintendomaster100]

and who was your kindergarten teacher?

[Mitza399]

noob =))

[calvincougar]

your workings are completely wrong! it should be (10x-x=9.9-0.99) NOT (10x-x=9.9-0.9). so 9x=8.91. x=0.99. CHECK YOUR WORKINGS!

[JaimeHerreroG]

probably my IQ is bigger than yours and i can tell you're just using math terms people don't know. 0.99 period is actually 1, and 1.99 period is actually two, so 0.99perios (1) + 0.99period(1) is actually 1.99period (2). Conclusion, as everybody knows, 1+1=2

[MrXenitha]

@JaimeHerreroG He didn't say 1+1 is not equal to 2, he is saying that 2 can also be written as 1.9... recurring

[quickmythril]

for the people who don't understand the line over the .9, he never said 1 = .9 or even .9999, he said 1 = .9 (with a repeating 9) that means a number that is 1 minus .0000000000000000(zeroes forever)1, this is basically the smallest number larger than 0. take two dollar bills, remove one single atom from one of them. you still have two dollars, lol

[skiewthax]

this video is completely useless even tho it's true

[quickmythril]

so you are saying that .999999 is equal to 1. duh

[herstealingmabucket]

This guy is just showing something that is technically right.

[zmarcusz]

only a retard would draw G's and not correct himself/ herself before showing a video.. otherwise this happens.

[BobderCreeper]

Ein Paradoxon ihr Opas.

[tomsmit15]

x is a random number x can be every number if you say x=0.99 then your right, but the simple 1+1 will always be 2...

[bayliss131]

if it does equal 1.99999 round it up to the nearest number which is 2

[666ronin999]

your statement that 9.999... - 0.999... = 9 is an approximation at the infinitesimal level, and so the statement is only proved to the closest infinitesimal. You're proving that 2 is very close to 1.999999999999, which nobody is denying

[Vier5502]

@666ronin999 I disagree in that it is an approximation, given that the (infinitely close to 1) number is being subtracted from [9 + (infinitely close to 1)]. .9999...=.9999... does it not? Thus, 9 is not an approximation, it is what's left when the (infinitely close to 1) numbers cancel themselves out.

[MrStargunburst]

0.9 + 0.9 = 1.8 you fucking nerd.

[TTomeRR223]

if 1=0.99 , 1+1 = 1.98 u idiot .. :O

[DammalSC]

@TTomeRR223 Youre the idiot, the bar on top of the nines mean its not 0,99, but 0,9999999999999999999999999999­9999999999999999999999 and so on until eternity

[Amrogamer]

If 1 were to equal 0.9 as your video states, 1+1 would be 1.8, not 1.9

[TheFuckabilly]

0:40 Buffering...Buffering...Buffer­ing...Buffering...

[XxTheFinNisHDuDexX]

Math has power!!!

[UniqueSimpleton]

if 1 = 0.9 then doesn't that mean 1+1 = 1.8

[TheTerminator102]

@UniqueSimpleton Your nearly right :D sorry but right would be then 0,99+0,99=1,98 :=)

[hannes3120]

1/3 = 0.33333

3*0.33333 = 0.99999 = 1

easy...

[ericdevey]

@hannes3120 you're rounding. 1/3 = 0.3333333333333333333333333333­333333333333333333333333333333­333333333333333333333333333333­333333333333333333333333333333­333333333333333333333333333333­333333333333333333333333333333­333333333333333333333333333333­3333 and so on. It never ends because 1/3 can't go evenly into decimals.

[BigRed453]

@hannes3120 on the contrary, sig figs would resolve this issue. 1 is equal to 1 no matter how hard you try. no excpetions

[madman2u]

Here's a funny one!

Take one pile of sand and add another pile of sand, how many piles do you got now?

[HylianMinecrafter]

@madman2u One! :D

[WhosNicoZ]

ur stupid...

[izFoXyy]

Fuckin stupid! how old u are?

[leooleh]

puto friki de mierda anda que te den por el culo

[slugfestdude]

what the fuck is x?

[cammmah]

prooof that i fucked ur mum....she has crabs :)

[Wherewithals]

X = 0.999999...

10X - X ≠ 9

580 people are stupidly mistaken.

[Vonlava]

Yeah, you made the equation disproportionate in the second step...

You randomly multiplied the left side by 10 but not the right.

[Due314]

first of all 0.9repeating plus 0.9repeating does not equal 1.9repeating it equals 1.999999...99999998 and secondly your logic is flawed because you have 9.99999...99990-0.999999...999­99 so that comes out to 8.99999...9999991 which when divide by 9 will get you 0.99999999...999999

[FlyDan11]

@Due314 Actually, 0.9repeating+0.9repeating = 1.9repeating. Its a fact. This can be demonstrated multiple ways. It stems from the fact that 0.9repeating=1. Ask yourself, with infinite 9s, is there really a difference between 1 and 0.9repeating? No.

[MrMegashark1]

Actually if you want to get really technical with the math 1.9999999....=2, since for two numbers to be different there must be a number between them. since there is no number between these two their the same.

[MatthiasKohl]

@MrMegashark1 Actually if you want to really really get technical then you would know that 1.9999 .... is a decimal number but not a real number nor a complex number. Though, in mathematics, we do not need decimal numbers (have you ever seen any proof over decimal numbers ?), since they are only a representation. So there is not even a point of comparing 1.99999 ... and 2. 1.9999 ... is just one representation of 2 but commonly, we use 2 as the representation of 2.

[craig29t]

g is a number?

[TheWilliamMaster]

@craig29t its a nine but still you have a funny joke XD

[rich1051414]

10x = 9.99... you changed the outcome inserting the -x... 10 = 10 therefor 10 - 10 also = 10? NO! study math more please...

[LNZFAN664]

heres how its done 1+1= KISS MY ASS!

[MrMelonMuffins]

Who is this madman, hes breaking the very concept of mathematics

[dhspike]

first i watch 2x2=5...now this?

[mrik636]

Well i can't argue. my mathematics doesn't go that crazy. What I do know is "A very good proof" in your description is terrible English!! So much for your IQ. Derr I done do good mafimatics derr

[dagamerguy12]

JUST USE A CALCULATOR!!!!!!

[dagamerguy12]

JUST USE A CALCULATOR !!!!!!!!!!!

[KuLuPee916]

1 + 1 = ndysaHJdljnadshfbciugsdfnlsofd­ubvowfbohjWFE.

PROOF??????

1 = ndysaHJdljnadshfbciugs, so ndysaHJdljnadshfbciugs + ndysaHJdljnadshfbciugs = ndysaHJdljnadshfbciugsdfnlsofd­ubvowfbohjWFE

[KillaTtheboss]

Hopefully you will major in something that has nothing to do with math whatsoever

[RedSkye87]

are those 9's or g's?

[theprsking187]

will that work with oranges too?

[TheOneDemigod]

...No. Just no.

[gorgolyt]

lol, the amount of ignorance from armchair mathematicians is making me rage.

yes, 1 = 0.999 recurring. get over it, kthxbye.

[Bulldawgs1231]

That was stupid I didn't even understand it till the end when i realized those g were actually 9s!

[SkarValidus]

You people don't know math. Here's another proof (use a calculator if you don't believe me):

1/9 = 0.11 (repeating)

7/9 = 0.77 (repeating)

x/9 = 0.xx (repeating)

9/9 = 0.99 (repeating)

Therefor, 0.99 (repeating) is equal to one. I figured this out in grade nine, people.

[StateOfChaosVids]

@SkarValidus .99 repeating does not equal 1. It approaches 1 and gets infinitely close, but is never equal to 1.

[rshelper5]

well, the best way to proof this is typing 2^0.5 on your calcultor

[CoolJDude311]

looks like we have a new number guys

its g

no offense but if you write that in math testa pretty sure you will get a F

[JVLigon]

you cant substitute one for x if your making x=.9999999999999 so your wrong and you have the iq of a grasshoper

[maskedgunman]

I hate it when people write "g" instead of "9."

[HylianMinecrafter]

7+7= 7,9999999?

That's what your writing looked like... :/

[hclew10]

@HylianMinecrafter more like 7+7=7,ggggggg

[TheWenmaster]

Aun intentas demostrar a tu profe de 2º ke te tenia que aprobar

[337camo]

So, you're telling me that i have 1.999 balls instead of 2?

[MeGustaMiRaggae]

This made my day the same way watching Jerry Springer makes my day. I have a good laugh, but at the end of the day I feel very sad for the future.

[mzxrules]

@MeGustaMiRaggae Yea, it is sad that people don't understand that 0.999 repeating equals 1.

[SightCollective]

Your math is wrong. The breakdown of the equation doesn't make sense. You subtract all the x's, then magically place them back to say 9x=9, I can't believe a fellow engineering student recommended this vid.

[Wherewithals]

@SightCollective 10X - X does not take out all of the X's.... I can't believe an engineering student posted that comment...

[LetalMartinez]

0.999999..... - 0.999999... is a forbidden math operation. You cannot subtract a numbers with infinity of decimals. All this tricks are using always the same resources, using zero as any other number (which is not), and using "infinity" in some way. (inf-inf) !=0, it is an indetermination. Th number .99999999..cannot be used like it is any other number.

[arminbih123]

Your kids will never pass 1st grade...

[mrmoneymario]

i completely agree, 1 does equal 0,gg

[ArvishJoly]

no

[zmonTepison]

nope

[GC123roxors96]

Your handwriting sucks...

Proof that 1+1 = 1,gg repeating? Sure.

[foshoitzdanny]

g doesn't equal 9

[magicsixball]

x = 0,gg

[lalakersown1]

ur 9's look like g's and your decimal points look like comas so i dont even know if your doing math or language arts

[dirgmario]

your trick is that in 0:46 you only put 0.9, you should put 0.99 because 9.9 - .99 is 8.99991.

[TransonicProductions]

.9 repeating is technically 1, but you added 1+1, whole numbers. If you add two whole numbers, your going to get another whole number...

[MegaMistborn]

Even if you just do the calculation with finite numbers, say 0.99999, it doesn't work. Then you have 9.9999-.99999=8.99991, which is most definitely not 9. There seems to be something about an infinite series of numbers that screws people's perception up, but this is just blatantly trolling.

[TrueZombieTwitch]

I don't get how anyone could think that 1 + 1 = 1.ggggggggg

[billybobsmile]

As LiDP and userdada have already said, this is quite clearly incorrent.. however I'm suprised you couldn't simply see your error when x (which equalled 0.9 at the start) ended up equalling 1. lol

[Cvatl]

here is my proof you take one pile of sand and put it together with another pile of sand what do you got ? one pile of sand 1+1=1 easy

[leinoc]

@Cvatl ...I know you're being amusing, but if a pile of sand is defined as "the quantity of sand present in your first pile of sand,", and your second pile is the same quantity, then you surely do not have 1 pile of sand. You have 2 piles of sand.

[userdada]

if 1 = 0.9 then 1+1=0.(99) + 0.(99)=1.(88)

[userdada]

this is shit.... assume that x=0.(5)....than what happens...and why your first one is one and your second one is 0.(9) ? in 1+1(0.(9))=bullshit...fuck you retarded upside down kid...

[LilDP]

Incorrect! You are assuming that x = .9 before you prove that x = .9. If you are going to try to subtract x from one side, subtract x from the other. This proof is far incorrect.

[FPSMartin]

you made a mistake!

you sayd x=0,99 but then in 10x-x you made the 0,99 to a 0,9

you wrote 10x-x=9,9-0,9 when its 9,9-0,99

[tdn1991]

@FPSMartin Yeah you're right about him making that mistake, but you make the same mistake lol

[mzxrules]

@tdn1991 Where did he make a mistake in his proof? It's practically copied off of wikipedia.

[sportmaster2467]

technically it would be 1.8

[DoRiTosS2011]

how come? my teacher said whatever you got 0.9999999 still wont be 1 ...:S

[enjoiNirvana]

heres my proof that 1+1=2. take one apple. now take one more apple. how many apples do you have?

[ArmyMedicRN]

@enjoiNirvana That's a demonstration, not a mathematical proof

[narutovichigo]

@enjoiNirvana the best proof i have ever read :D

[STLConservative]

@enjoiNirvana 1.999 because some apple cells stuck to the ground.

[myzxcvbnm0987654321]

uhh the nines are g's by the way.

[aris1009]

Those are called periodical numbers and there is a reason that calculations can not be made with these numbers. Same as infinity/infinity can not be made or else with your logic its equal to 1. First learn some correct maths and then come calling people grasshopers, grasshoper.

[matganja1000]

i have do the same like yours but the answer is.... 1+1 = fuck you!

[K9CrunchieProduction]

@matganja1000 Sorry Bro', it's 2 xD...

[kellerman1138]

Seriously? All this proves is that x=x … if x=0.99 then 10x–x isn't 9,9–0,9 it's 9,9–0,99, and when you correct that error you end up with x equalling 0,99 at the end as well.

[Nef619]

now if only I could of understood your hand writting...

[TTabancaTT]

go and study ''limit'' lesson

[BloodyAllLover]

@TTabancaTT Yep. nuf said

[Gpshgt]

u are only a fucking idiot

[shadronify]

who says x=1

last time in highschool they said x could be any number

[MrXenitha]

@shadronify This is a linear equation, there is only one soltuion for x which means the outcome is just another representation of the first statment being x=0.(9).

[undead12335]

how did i get her from crysis gameplay

[jaky222]

im losing my time...

[SD2OCsponger]

you have way to much time on your hands

[bezzimot]

1+1 = 1,gg?

[Loopulse]

One is a whole number, 0.9999.... isn't. So they therefore, are different numbers, with a similar, if not same value. 

[MrXenitha]

@Loopulse 0.(9) is a decimal representation of the integer 1; they are both whole numbers.

[Vittor066]

so one orange plus one orange is 1.999999 oranges....o shiiit

[topher61891]

So if I have one dollar, and I find another dollar, I now have one dollar and 99 cents repeated.

[MrXenitha]

@topher61891 No because $1 = $0.99... therefore you must round every digit to the nearest cent.

The eqution concerns an infinite number of 9s where as in this context you have to force a finite value for it to become applicable.

[kidbatJT]

Um..Were those 9's Or g's?

[BigGordonLips]

@kidbatJT I, gg