What is expanded notation?

Expanded notation is a way to represent a number as the sum of each digit multiplied by its place value. For example, the number 456 written in expanded notation would be: 400 + 50 + 6. This form allows for a clearer understanding of the value of each digit in the number. Expanded notation is often used in teaching place value and number sense to students. It is also useful for breaking down larger numbers into smaller, more manageable parts for calculations.