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Common SI Prefixes

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Kilo
1000 (k) kilometer (km)
Hecto
100 (h) hectometer (hm)
Deka
10 (da) dekameter (dam)
Deci
.1 (d) decimeter (dm)
Centi
.01 (c) centimeter (cm)
Milli
.001 (m) millimeter (mm)