Math

Conversion units - Metric length

1m = 10 dm        Remember when going from a larger unit to a smaller
1m = 100 cm       unit (i.e., meters to centimeters), multiply
1m = 1000 mm

1mm = 0.001 m              
1mm = 0.1 cm

1cm = 10 mm
1cm = 0.1 dm
1cm = 0.01 m

1dm = 100 mm        When going from a smaller unit to a larger 
1mm = 0.01 dm     unit (i.e., centimeters to meters), divide.
1dm = 10 cm
1dm = 0.1 m