Numbers in expanded form with base 10 are written in a way that represents the sum of the value of each digit based on their place value. This means that each digit in the number is multiplied by the appropriate power of 10 and then added together to determine the total value of the number. This form is useful because it allows us to visually see the individual values of each digit and better understand the overall value of the number. For example, the number 325 in expanded form with base 10 would be written as 300 + 20 + 5, which clearly shows the quantity and value of each digit.
