Question

resolva as seguintes expressões algébrica
a)-4+{5-[3-(-7+9)]}
b)38-[-12-(-20+30)+(12-50-20)]
c)-(2)+(-3)-{-2+[-1-(-2+1)]+5}

Answer 1

a) -4+{5-[3-(-7+9)]} = -4+{5-[3-2]} = -4+{5-1} = -4+4 = 0

b) 38-[-12-(-20+30)+(12-50-20)] = 38-[-12-10+58] = 38-36 = 2

c) -(2)+(-3)-{-2+[-1-(-2+1)]+5} = -2-3-{-2+[-1+1]+5} = -5-{-2+0+5} = -5-3 = -8