Add: + 47 and -27
Answers:  A) - 30  B) + 30  C) 0  D) 27  E) 47

Rationale: the absolute values of + 47 and - 27 are 47 and 27 respectively ; and their difference = 47 – 27 = 30 . ( + 47 ) + ( - 27 ) = + 30 answer : b
Answer: B