There are some areas of land on Earth that are below sea level. Imagine you are at the Dead Sea in Africa, which has an elevation of about −1,410 feet (1,410 feet below sea level). You then climb up 125 feet. What is your new elevation?
If you are at the Dead Sea, 1,410 feet below sea level, and you climb up 125 feet, your new elevation would be:
-1,410 feet + 125 feet = -1,285 feet
So, your new elevation would be -1,285 feet.
If you are at the Dead Sea in Africa, which has an elevation of about -1,410 feet, and you climb up 125 feet, your new elevation would be:
-1,410 feet + 125 feet = -1,285 feet
So your new elevation would be -1,285 feet above sea level.