1 Kilometer = 10 Hectometers
= 100 Dekameters
= 1000 Meters
1 Meter = 10 Decimeters
= 100 Centimeters
1 Decimeter = 10 Centimeters
1 Centimeter = 10 milimeters
Just to give you a table of conversion.
Now to get the answer.
500 Meters + 300 Meters = 800 Meters
800 Meters + 10 Kilometers
You can't add numbers with different units, so you're going to have to convert. So the equation would end up being:
800 Meters + 10000 Meters = 10800 Meters
Since you have to answer it in Kilometers, you're going to have to convert it again to Kilometers. Since 1 Kilometer is equal to 1000 Meters, yo would have to divide 10800 by 1000. So it would turn out like this:
= 10.8 Kilometers
Now, here's what we've done:
500 Meters + 300 Meters + 10 Kilometers
= 500 Meters + 300 Meters + 10000 Meters
= 10800 Meters
= 10.8 Kilometers
