Question

me pueden ayudar xfa

Answer 1

A. [(-28)-(+42)]-(-13)
[-28-42]+13
-70+13
-57

B. [(-15)-(-6)]-(-23)
[-15+6]+23
-9+23
14

C. [(+45)-(-4)]-(+17)
[45+4]-17
49-17
32

D. [(+27)-(-18)]-(-72)
[27+18]+72
45+72
117