On the number line below, what is the sum of the two points marked with red?
![On the number line below what is the sum of the two points marked with red class=](https://us-static.z-dn.net/files/d2b/bd220215f0dbbb6f1e8b019b1597bdb8.png)
Answer:
0
Step-by-step explanation:
One point is at -18, and the other is at 18. However, when we add -18 and 18 together, the result is 0, because they cancel each other out.