The document discusses three different ways to write numbers:
1) Standard form - the typical numerical representation, such as 536
2) Word form - writing out the number in words, such as "five hundred thirty-six"
3) Expanded form - writing the number as the sum of the value of its digits, such as 500 + 30 + 6 for 536
It then provides examples and practice problems for writing numbers in these three forms.