- Creating new units of different sizes
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Creating new units of different sizes
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In the metric system, new units of different sizes are created by putting prefixes in front of the root units. I'll call these new units "prefix units".

There are many prefixes, but you will mostly use only three of them: kilo-, centi-, and milli-. (I'll tell you what the prefixes mean soon. )
Table: Examples of Common Prefix Units in the Metric System
Root Unit "kilo-" prefix added "centi-" prefix added "milli-" prefix added
meter (m) kilometer centimeter millimeter
gram (g) kilogram centigram milligram
liter (L) kiloliter centiliter milliliter

Creating new units of different sizes, prefix units
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