5.MD.3

5.MD.3. Recognize volume as an attribute of solid figures and understand concepts of volume measurement.
 * A cube with side length 1 unit, called a “unit cube,” is said to have “one cubic unit” of volume, and can be used to measure volume.
 * A solid figure which can be packed without gaps or overlaps using //n// unit cubes is said to have a volume of //n// cubic units.