Question

Elimine os parênteses e calcule
A)(-34)+(+12)
B)(-84)+(+84)
C)(+48)+(-66)
E) 0 +(+77)

Answer 1

A) -24

B) 0

C) -16

E) 77

Answer 2

a) (-34) + (+12) =
-34 + 12
= -22


b) (-84) + (+84) =
- 84 + 84
= 0


c) (+48) + (-66) =
+ 48 - 66
= - 18


d) 0 + (+77) =
0 + 77
= 77


Regra de Sinais:

+ + = +
- - = +
+ - = -
- + = -