Resposta:
a)
[tex] \frac{3 + 7}{5} > \frac{10}{5} > 2[/tex]
b)
[tex] \frac{3}{7} \times \frac{7}{2} = \frac{6 \times 49}{14} > \frac{294}{14} > 21 [/tex]
c)
[tex] \frac{3}{7} \div \frac{7}{2} = \frac{3}{7} \times \frac{2}{7} = \frac{6}{49} [/tex]
