standard_description: Apply concepts of density based on area and volume in modeling situations (e.g., persons per square mile, BTUs per cubic foot).
problem_activity: Fill out the following chart.
| **           Standard form          ** |  **           Unit form          **  | **           Expanded form          ** |
|----------------------------------------|--------------------------------------|----------------------------------------|
|                                        |                                      |            5,000 + 400 + 3             |
|                                        | 8 thousands 6 hundreds 3 tens 2 ones |                                        |
|                 2,061                  |                                      |                                        |


aligns: no