Question

Determinado as adições algébricas: algébrica a) (-9)-(+7)+(+13)-(-20) b) (-11)+(-7)+(+18) c) (-51)+(-82)-(-12)-(+7)

Answer 1

a)-9-7+13+20
-16+33
17

b)-11-7+18
-18-18
0

c)-51-82+12-7
-140+12
-128

Answer 2

a) -9-7+13+20= -16+33= 17.
b)-11-7+18=-18+18=0
c)-51-82+12-7= -133+5 = -128