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Creating Conversion Factor from Equivalent
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Remember that we can create two conversion factors from every equivalent.
Here are the two conversion factors that go with the easiest equivalents for some metric prefixes.

Table: The Two Conversion Factors for the Easiest Equivalents
Easiest Equivalent
(1 bigger unit =
this many smaller units)
Conversion Factor 1 Conversion Factor 2
Mm 1 Mm = 106 m 1 Mm  / 106 m  106 m / 1 Mm
km 1 km = 103 m 1 km  / 103 m  103 m / 1 km
hm 1 hm = 102 m 1 hm  / 102 m   102 m / 1 hm
dam 1 dam = 101 m 1 dam / 101 m   101 m / 1 dam
root unit, i.e. meter (m), gram (g), or liter (L)
dm 1 dm = 10-1 m 1 m  /  101 dm 101 dm / 1 m
cm 1 cm = 10-2 m 1 m  / 102 cm 102 cm / 1 m
mm 1 mm = 10-3 m 1 m  / 103 mm  103 mm / 1 m
mium 1 mium = 10-6 m 1 m  / 106 mium  106 mium / 1 m
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