1, 7 hectares = () square meters 50 square decimeters = () square centimeters.
8 square kilometers = () hectares 2000 square decimeters = () square meters.
2. 1 has (), and 8 () is.
3. Look at money and write decimals.
() yuan
() yuan
4. The perimeter of a square with a side length of 4 cm is () and the area is ().
5. fill in the box >,