## Thinking Mathematically (6th Edition)

First we can convert 0.0002 km to units of meters. We know that 1 km = 1000 m, so we can move the decimal point three places to the right. 0.0002 km = 0.2 m Now we need to move the decimal point one place to the right. Therefore, we need to use a unit that is equal to 0.1 m and this unit is $dm$ (decimeter). We know that 1 m = 10 dm. We can convert 0.2 m to units of dm. $0.2~m = 2~dm$ $0.0002~km = 0.2~m = 2~dm$
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