9. Measurement

Select the most reasonable metric unit for the given object.

A pencil is about 18 ___ long.

Select the most reasonable metric unit for the given object.

A soccer field is about 100 ___ long.

Select the most reasonable metric unit for the given object.

A grain of rice is about 7 ___ long.

Fill in the blank to convert as indicated. 

4500 mm = _____ m