Question: what is the mathematical definition for expanded form?
Answer: Expanded Notation. more ... Writing a number to show the value of each digit. It is shown as a sum of each digit multiplied by its matching place value (ones, tens, hundreds, etc.) For example: 4,265 = 4 × 1,000 + 2 × 100 + 6 × 10 + 5 × 1.