Question

resolva as expressões numéricas:
a)[-21-(-12+3•6)]
b){-3+[-2-2•(-3-5)]:(-2)}​

Answer 1

Resposta:

a)[-21-(-12+3•6)] = -21 + 12-3•6 =  -21 + 12- 18 = -27

b){-3+[-2-2•(-3-5)]:(-2)}​ = [-3+-2 + 5 + 10]:(-2) =  10:2 = 5