Answer:
Explanation:
![\text{5 km}*(1000 m)/(1 km) = 5000m](https://img.qammunity.org/2020/formulas/mathematics/middle-school/eegtbd15iz5hrcuu2a7w7y5f9pm8dnw48w.png)
Notice that the units cancel out. You always want that to happen. Depending on your grade level and your teacher, you can avoid the proportion by doing the question this way. Always make sure you arrange it so that 1 set of units will cancel.