Base 10, also known as the decimal system, is a numeral system that uses ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. Each digit's position in a number represents a power of ten, meaning that the value of a digit increases tenfold as you move left. For example, in the number 345, the 3 represents 300 (3 x 100), the 4 represents 40 (4 x 10), and the 5 represents 5 (5 x 1). This system is widely used in everyday life, from counting and measuring to financial transactions. Its simplicity and efficiency make it easy to perform arithmetic operations like addition, subtraction, multiplication, and division. Other numeral systems, such as binary (base 2) or hexadecimal (base 16), are also used in specific fields, but base 10 remains the most