Question

Determine as somas algébricas eliminando parênteses, colchetes e chaves.
a)(-4)+[23-(43-32)+(12+7)+(-5)]

b)[-11+(-23-10)-8]-{25-[17+(23-7)-(-12)]-(17+13)]

Com cálculos por favor!

Answer 1

Olá,

a)

(-4)+[23-(43-32)+(12+7)+(-5)] =
(-4)+[23-(11)+(19)-5] =
(-4)+[23-11+19-5] =
(-4)+[12+14] =
(-4)+[26] =
-4+26 =
22

b)

[-11+(-23-10)-8]-{25-[17+(23-7)-(-12)]-(17+13)} =
[-11+(-33)-8]-{25-[17+(16)+12]-(30)} =
[-11-33-8]-{25-[17+16+12]-30} =
[-52]-{25-[45]-30} =
-52-{25-45-30} =
-52-{-50} =
-52+50 =
-2