Question

determine as somas algébricas, iminando os parênteses, colchetes e chaves

Answer 1

a)-4+[23-11-5]-5
=-4+7-5=-2
b)[-11-33-8]-{25-[-17+16+12]-30}
=-52-{25-11-30}
=-52-(-16)
=-52+16
=-36
c)6-{2-14-[-8+36+20+7]+38]}
=6-{2-14-55+38}
=6+29
=35