Question

find the height difference between the top of mt Everest 8848 metres and the Mariana Trench 10911 metresbelow sea level

Answer 1

$Mount\ Everest\to+8,848m\\\\Mariana\ Trench\to-10,911m\\\\Difference:|-10,911-8,848m|=|-19,759|\\\\\center={\boxed{19,759\ (m)}}\leftarrow answer$