arvusüsteem, mille aluseks on kümme (ehk kümne arvu järjestikused asukohad) ning kus kasutatakse kümmet sümbolit (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), decimal (base ten) number system, used in mathematics for writing numbers and performing arithmetic, base-10 number system is known as the decimal system and has 10 digits to show all numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 using place value and a decimal point to separate whole numbers from decimal fra