Question

5. Elimine os parênteses e os colchetes e calcule o valor de: a) 35 + [–21 – (–12 + 15)] b) –20 – [21 + (–20 – 16) + 11] c) 20 – (16 + 17) – [15 – (18 – 23)] d) – (–30) – [37 + (35 – 31 – 34) – 36]

Answer 1

Resposta:

Explicação passo-a-passo:

a)35+[-21-(-12+15)]     b)-20-[21+(-20-16)+11]

 35+[-21-3]                   -20-[21-4+11]

 35+18=58                   -20-28=-48

c)20-(16+17)-[15-(18-23)]      d)-(30)-[37+(35-31-34)-36]

 20-33-[15-5]                         -30-[37-30-36]

 20-33-10=-23                       -30-29=-59