These are decimal numbers, and dots above some of the digits make them recurring decimals. One dot means the digit under it repeats infinitely. In other words, it goes on forever (and ever and ever).

Explore decimal fractions to represent and connect fractions and decimals. Represent fractions as parts of a set using the decimal fraction one-tenth (0.1). Practice reading decimals. Explore mixed ...

Students around the world often dislike mathematics and eagerly await the day when they won’t have to struggle with long, complicated calculations. While the hate is widespread, a comprehensive ...