Fill in the appropriate company name. (1) The desktop area of the desk is about 24 _ _ _ _ _ (2) The thickness of the math book is about 6 _ _ _ _&; n ...
Solution: (1) The desktop area of the desk is about 24 square decimeters (2) The thickness of the math book is about 6 mm (3) The blackboard area is about 4 square meters? (4) The height of a door is about 2m? The area of a stamp is about 6 square centimeters. (6) The length of a pen is about12cm. (7) China's total land area is about 9.6 million square kilometers, so the answer is: square decimeter, millimeter, square meter, meter, square centimeter, centimeter, square kilometer.