Question

1- Efetue após eliminar os parênteses:
a) (+12) – (+3) = ______________________________________
b) (-11) - (-19) = ______________________________________
c) (+13)+(-5)= ______________________________________
d) (-5)+(+17)-(-12)+(-20)=

2- Efetue:
54+612=

34-23=


112-76-32=

Answer 1

Resposta:

(+ 12 ) - ( +3 )

+12 - 3 = 9

(-11) - (-19)

-11 + 19 = 8

(+13) + (-5)

+13 - 5 = 8

( - 5 ) + ( + 17) - ( -12 ) + (-20)

-5 + 17 + 12 - 20

12 + 12 - 20

24 - 20 = 4

2-

54 + 612 = 666

34 - 23 = 11

112 - 76 - 32 =4