Metric system is all based on powers of ten. So to remember the metric units: King Henry Died Drinking Chocolate Milk Kilo Hecto Deca Deci Centi Milli

10 mm = 1 cm 100 cm = 1 m 1000 m = 1 km

Example: 2 m = ___ mm 1 m = 1000 mm Hence 2 m = 2 x 1000 Answer: 2000 mm