Decimal representation is a way of writing numbers so that everyone can understand them. It uses a special set of symbols called digits – 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. We put these digits together in a certain order to make numbers. For example, the number 5 is written as five, but in decimal representation it is written as "5" (just a single digit). Decimals are used to represent fractional numbers, like 1/10 or 0.1. For example, one tenth (1/10) would be written as "0.1" in decimal representation.