Fill in the appropriate unit name: the desk area of a student is 72 (), the volume of a math book is about 220 (), and the volume of a pile of stones is 2.4 ().
Fill in the appropriate unit name: a student desk covers an area of 72 (square decimeter)
The volume of a math book is about 220 (square centimeters).
The volume of a pile of stones is 2.4 cubic meters.
The volume of the ink cartridge is 60 cubic centimeters.