Math Is Fun Forum

Xepemu

Guest

0.999... = 1 :: alternative version

Hi! Just wanted to add another version, same result ... math IS awesome!

1/9 = 0.111...
9 x 0.111... = 0.999...

but

9 x 1/9 = 9/9 = 1

=> 0.999... = 1

Bob

Administrator

Registered: 2010-06-20

Posts: 10,618

Re: 0.999... = 1 :: alternative version

hi Xepemu

Welcome to the forum.

That's a neat method which seems to overcome the objections some folk have about infinite digits.

How about joining the membership?

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Craigerb

Member

Registered: 2019-12-15

Posts: 1

Re: 0.999... = 1 :: alternative version

If 0.999... (or 0.111...) were a number, you could multiply it by an integer,
but as it isn't, you can't.

Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 24,996

Website

Re: 0.999... = 1 :: alternative version

Hmm, what else could it be? Is it a kind of cookie? Is it a kind of lotion?

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'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.