# .9 Repeating = 1 YES -or- NO

## Does .9 Repeating equal to 1?   116 members have voted

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ericnkatz

I say Yes, 2 Students in the same class say No.

Must Solve This Problem

[Kinda Dorky Gay problem.. But w/e]

Thanks,

Proxy

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Dazzla

x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

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ericnkatz

Yeh Thats what im thinking too Dazzla

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Malechai
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

whoa dudes got skills!!

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un4given1

No. it equals .99999... if you round it then yes.

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OPaul

I say no.

.9999... = .9999...

1 = 1

.9999... is a none real number, 1 is a real number.

.9999... never reaches 1, it just gets closer and closer indefinitely.

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Bubbo

Another proof that it does equal 1:

0.111... = 1/9

0.111...*9 = 0.999...

since 0.111.... = 1/9 -> 1/9 * 9 = 0.999...

1/9 * 9 = 9/9 = 1

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Dazzla

Well it's just been proven two times, and disproven zip times. I'd say you've got one up on your mates.

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Samoa
Another proof that it does equal 1:

0.111... = 1/9

0.111...*9 = 0.999...

since 0.111.... = 1/9    ->  1/9 * 9 = 0.999...

1/9 * 9 = 9/9 = 1

That is incorrect.

1/9 * 9/1 is not the same as 1.... it is .9999.... and cannot equal 1

1/9 = .1111111...

.11111... * 9 = .9999999...

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Dazzla

Uhh, you've just posted exactly what he said.

You just said:

1/9 = .1111111...

1/9 * 9 = 1

.1111111... * 9 = 0.9999...

So you just proved 0.999.... = 1

Congratulations.

If Dazzla gives 1 chocolate bar each to 9 kiddies then not only is he weird but they have 1/9 of my stash of sweets, when then give them back I don't have 0.99999.... of a stash, I have one; the beauty of fractions... :p

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Samoa
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

if x=.9999

then X cannot equal 1

10x=9.9999 true

10x-x=9x is not true

10(.9999)-.9999=9

9(.9999)=8.991 therefore

9=8.991 is not correct

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un4given1

so... if what you are saying is correct... .9999999999999999999999...=1

So, if you divide 1 by .9999999999999999999999... then you should get 1 right, because 10/10=1 9/9=1 (here's my proofs)

But, infact you get 1.0000000000000000000000000000...1

Thank you

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Dazzla
10x=9.9999 true

(Y)

10x-x=9x is not true

(N) LMAO!

10(.9999)-.9999=9

9(.9999)=8.991 therefore

9=8.991 is not correct

Totally misunderstood...

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Samoa
Uhh, you've just posted exactly what he said.

You just said:

1/9 * 9 = 1

.1111111... * 9 = 0.9999...

So you just proved 0.999.... = 1

Congratulations.

If Dazzla gives 1 chocolate bar each to 9 kiddies then not only is he weird but they have 1/9 of my stash of sweets, when then give them back I don't have 0.99999.... of a stash, I have one; the beauty of fractions... :p

your math calculations are totally wacked dazzla,

.11111 is not 1

the equations of .1111 * 9 = .99999 is not saying .999 is 1

IT IS LESS THAN ONE.

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Dazzla
so... if what you are saying is correct... .9999999999999999999999...=1

So, if you divide 1 by .9999999999999999999999... then you should get 1 right, because 10/10=1 9/9=1 (here's my proofs)

But, infact you get 1.0000000000000000000000000000...1

Thank you

Hahaha, did you do that on calc.exe?

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Dazzla
Uhh, you've just posted exactly what he said.

You just said:

1/9 * 9 = 1

.1111111... * 9 = 0.9999...

So you just proved 0.999.... = 1

Congratulations.

If Dazzla gives 1 chocolate bar each to 9 kiddies then not only is he weird but they have 1/9 of my stash of sweets, when then give them back I don't have 0.99999.... of a stash, I have one; the beauty of fractions... :p

your math calculations are totally wacked dazzla,

.11111 is not 1

the equations of .1111 * 9 = .99999 is not saying .999 is 1

IT IS LESS THAN ONE.

Please, point out where I said .1111 = 1.

0.9 recurring has been mathematically proven time and time again and is a known fact.

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un4given1
10x-x=9x is not true

where the hell did you go to school?

If you subtract something from one side you also have to subtract it from the other side. You can't just make up your own rules.

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Samoa

Dazzla and anyone who believes that .9999 is the same as 1, needs to go back to school or should not have dropped out.

I showed your calculations were incorrect, and you laugh cause you think I'm wrong??? Please. Calculators don't lie.

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Dazzla

OMG, this can't be done on a freaking calcluator because it goes on to infinity you idiot!

0.9 recurring is a rational number, the same way that 0.3 recurring = 1/3. FOOL

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bangbang023
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

I think you a made a mistake:

10x = 9.9999

but why subtract x then? that doesn't make sense. You would have to divide the X if you want to get it to the other side.

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Samoa
where the hell did you go to school?

If you subtract something from one side you also have to subtract it from the other side. You can't just make up your own rules.

HELLO

LOOK AT DAZZLA'S ORIGINAL FORMULAS, THAT'S WHERE i GOT IT. I WAS DISSPROVING HIS CALUCULATIONS...

Did you even go to school?

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Dazzla

More proof:

0.3 recurring = 1/3

0.3 recurring * 3 = 0.9 recurring

1/3 *3 = 1

0.9 recurring CANNOT be done on a freaking calculator!

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Dazzla
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

I think you a made a mistake:

10x = 9.9999

but why subtract x then? that doesn't make sense. You would have to divide the X if you want to get it to the other side.

People, it's not 0.9999, a zero then a decimal place then 4 nines, it goes on to infinity, you CANNOT use a calculator!

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Imperfect63

oh my, such a simple proof yet so many confused minds... should i show a 1 = 0 proof? :p

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bangbang023
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

I think you a made a mistake:

10x = 9.9999

but why subtract x then? that doesn't make sense. You would have to divide the X if you want to get it to the other side.

People, it's not 0.9999, a zero then a decimal place then 4 nines, it goes on to infinity, you CANNOT use a calculator!

I'm not using a calculator. I am doing the written math. you get 10x = 9.999.....

so why are you subtracting X? You don't subtract, you divide by 10 to ge tthe X by itself. if you subract x from one side you must also do it the the other side.