1. METRIC UNITS OF LENGTH

2. Discovering units of length
Materials needed:
Metric ruler or metricstick, paper, pencil, calculator
The millimeter (mm), centimeter (cm),
decimeter (dm), and kilometer (km) are metric
units of length.
1m =
1000mm
100cm
10 dm
1km =
1000 m
Which units are smaller than a meter? Larger than a meter?
Which unit would you use to measure the height of your desk? Explain why you think your choice is reasonable.
What objects in your classroom would you measure in meters? Explain why you think your choice is reasonable.
What unit would you use to measure the distance between two cities? Explain why you think your choice is reasonable.
What unit would you use to measure the length of an ant? Explain why you think your choice is reasonable.

3. . ___ ________________________________
6. Find the marks that represent each unit on your metric ruler.
. ___ ________________________________
1mm 1cm dm
7. How many millimeters long is your metric ruler? How many centimeters? How many decimeters?
8. How many millimeters long is a meterstick? How many centimeters? How many decimeters?
Use your metric ruler to measure the lenght of your English book. What is the length of your book in millimeters? in centimeters? In decimeters?
Name 3 objects you would measure in millimeters; in centimeters; in decimeters; in meters; in kilometers.