a)
[tex]3 \frac{1}{2} \times ( - 2 \frac{2}{7}) = \frac{7}{2} \times ( - \frac{16}{7}) = - 8[/tex]
b)
[tex] - 4 \frac{2}{7} \div 1 \frac{1}{14} = - \frac{30}{7} \div \frac{15}{14} = - \frac{30}{7} \times \frac{14}{15} = - 2 \times 2 = - 4[/tex]
