## Thinking Mathematically (6th Edition)

First we can convert 7000 dm to units of meters. We know that 1 meter = 10 dm, so we can move the decimal point one place to the left. $7000 ~dm = 700 ~m$ Now we need to move the decimal point two places to the left. Therefore, we need to use a unit that is equal to 100 m and this unit is $hm$ (hectometer). We know that 1 hm = 100 m. We can convert 700 m to units of hm. $700~m = 7~hm$ $7000~dm = 700~m = 7~hm$