Question

- (+10-20) +(-40+50-60)

Answer 1

-(-10)+(+10-60)
-(-10)+(-50)
+10-50
-40

Answer 2

Olá,

Vamos lá,

= - ( +10-20) +( -40 + 50 - 60)

= -( - 10) +( -50)

= + 10 - 50

= -40

Resposta: -40