Question

Efetue

A) (-9)-(-9)
B) (+13)-(-4)
C) 0-(+17)
D) (+9)-(+9)
E) (-17)-(-14)
F) (-51)-(+15)

Answer 1

A) (-9)-(-9) = - 9 + 9 = 0

B) (+13)-(-4) = 13+4 = 17

C) 0-(+17) = 0 - 17 = - 17

D) (+9)-(+9) = +9-9 = 0 

E) (-17)-(-14) = - 17 + 14 = - 3

F) (-51)-(+15) = - 51 - 15 = - 66