In this lesson, students will compare multi-digit decimals to the thousandths based on meanings of the digits. Compare decimals by making use of the structure of the place value system, namely that one of any unit is greater than any amount of a smaller unit. Thus, the largest place value in each number contains the most relevant information when comparing numbers. If both numbers have the same number of largest units, the next largest place value should be attended to next, iteratively, until one digit is greater than another in the same unit. Compare numbers written in various forms, including standard, word, and expanded form.