Express $30 k m 80 m$ as kilometers using decimals

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Solution

Step 1
Convert meter part into km
We know that
$1 k m = 1000 m \Rightarrow 1 m = \frac{1}{1000} k m \Rightarrow 80 m = \frac{80}{1000} k m = 0.080 k m$
Step 2
Add both km parts
$30 k m + 0.080 k m = 30.080 k m$
Hence $30 k m 80 m$ can be represented as $30.080 k m$

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