Question

Add successor of -99 and the predecessor of _40

Answer 1

Successor of -99 = -98
Predecessor of 40 = 39
Adding -98 and 39 = -98+39 = -59
The answer is -59..

Answer 2

successor of -99 = -99 + 1 = -98
predecessor of 40 = 40-1 = 39
successor + predecessor = -98 + 39 = -59
Answer is -59