Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**Xepemu****Guest**

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: 8,909

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

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

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**Craigerb****Member**- Registered: 2019-12-15
- Posts: 1

If 0.999... (or 0.111...) were a number, you could multiply it by an integer,

but as it isn't, you can't.

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

'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.

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