Question

A runner has run 1.192 kilometers of a 10-kilometer race. How much farther does he need to run to finish the race? Show your reasoning.

Answer 1

8.808 kilometers

Explanation:

Think about it like this: The kilometers run and the kilometers needed to be run would add to ten. Therefore the equation is this:
1.192 + x = 10

To isolate the variable ("x"), we need to subtract 1.192 from 10.

x = 10 - 1.192

x = 8.808