Question

the elevation of the surface of the Dead Sea is -424.3 meters. In 2005 the height of Mountain Everest was 8,844.43 meters how much higher was the summit of Mountain Everest?

Answer 1

9268.3 meters because 8844.43- (-424.3) has a difference of 9268.3. You have to add because of the double negative.

Answer 2

In order to do this, we subtract -424.3 from 8,844.43.  This is the same as adding 424.3 to 8,844.43, which equals 9,268.73 meters.