Resposta:
[tex]( - \frac{1}{3}) \times ( - \frac{1}{4} ) \times \frac{2}{5} \times 1 = \\ ( - \frac{1}{3}) \times ( - \frac{1}{4} ) \times \frac{2}{5} = \\ \frac{1}{3} \times \frac{1}{4} \times \frac{2}{5} = \\ \frac{1}{3} \times \frac{1}{2} \times \frac{1}{5} = \\ \frac{1}{30} [/tex]
Espero que ajude :)
