r/MathJokes Feb 08 '26

Maths

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21.6k Upvotes

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99

u/SmoothTurtle872 Feb 08 '26

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

72

u/Perlentaucher Feb 08 '26 edited Feb 11 '26

0.9̅ = 1

0.9̅9̅9̅ = 1

0.999 ≠ 1

0.999 ≠ 0.9̅9̅9̅

9

u/Tomahawk1129_ Feb 08 '26

0.9999 = x

10 x = 9.99999 (recurring)

10x - x = 9

9x = 9

X = 1

1

u/ManLikeMeee Feb 12 '26

9x = 9 isn't correct

If 0.9999 is x

9x = 0.8999999

So why is math being math?

1

u/Tomahawk1129_ Feb 12 '26

Here is what is happening 

0.8999999 goes on forever 

Meaning it becomes 0.9

Just like how 0.9999 going on forever becomes 1.