An "Eight-Digit" number refers to any numerical value that consists of exactly eight digits. This means it can range from 10,000,000 to 99,999,999. Eight-digit numbers are commonly used in various applications, such as in bank account numbers, phone numbers, and identification codes. In mathematics, eight-digit numbers can be manipulated through basic operations like addition, subtraction, multiplication, and division. They are also significant in fields like computer science, where they may represent data or memory addresses. Understanding eight-digit numbers is essential for tasks that require precise numerical identification.