6.55 is the number halfway between 6.5 and 6.6

Fact

You can write the number 6 -> 6.000

adding more 0 in a decimal number it doesn't change anything, but when you add number higher than 0 it could changes the number position.

Ex.

when you write 6.5 and 6.55 it is actually different, which comes first? ofc 6.5. Bcs, 6.5 we also could write 6.50 (and it doesn't change the position of 6.5)

So,, we could write :

6.5, 6.51, 6.52, 6.53, 6.54, 6.55, 6.56, 6.57, 6.58, 6.59, 6.6

-Thank you