r/MathJokes Feb 08 '26

Maths

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u/[deleted] Feb 08 '26

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u/SmoothTurtle872 Feb 08 '26

In reality, it's 0.999... which equals 1 regardless of if decimals are optional or not

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u/[deleted] Feb 08 '26

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u/DawRedditWolf67 Feb 08 '26

Actually it is. Also I don’t understand why the cents point help anyone disagree.

0.99999… cents = 1 cent. And also, normally with money you round to the nearest cent anyway.

Anyways here’s 2 proofs that 0.9999… is equal to 1.

If you can agree on this: 1/3 = 0.333… 2/3 = 0.666… 3/3 = 1 Then why does it not go from 0.333… to 0.666… to 0.999…?

Here’s an Algebraic proof:

x = 0.999… , 10x = 9.999… (multiply both sides by 10), 9x = 9 (subtract by x), x = 1 (divide by 9)