What do the repeating dots in a math problem mean?

Answer 1

The repeating dots, (Example: 1.333...) mean that the number is infinitely

defined, in other words, the number never ends. We can also make the previous
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example look like this: It will have the same meaning. 1 .3 (With A bar over the 3) = 1.333...

The bar will indicate which decimal values are infinite.

Also please note that the bar should be above the numbers that are repeating

do not "abuse" the bar, It has the potential to get the question wrong.

Hope I helped! ~WonX~