Question

Efetue as espressos
(a) (-24)+(+4)+(-4)
(b) {-2+[-5+(-2+5-7)+2]}
(c) (+4+5-2)

Answer 1

a) -24+4-4=-24
b) {-2+[-5+(-9+5)+2]}
{-2+[-5+(-4)+2]}
{-2+[-5-5+2]}
{-2+[-8]}
-2-8=-10

c) +9-2=7