What is the answer in the the following math problems.....?

Question

The lowest elevation on Earth is -1312 feet. (that is, 1312 feet below sea level) at the Dead Sea. If an object is 658 feet above the point, what is its underwater elevation? (my answer is 654 feet below sea level, is that correct)

Answer 1

-1312

+ 658

= 654

to cheack ur answer add the 2

then negate it

  658

+654

=1312