Resposta:
[tex] a\: \frac{2}{5} + \frac{6}{5} = \frac{8}{5} [/tex]
[tex]b \: \frac{1}{2} + \frac{1}{4} = \frac{2}{4} [/tex]
[tex]c \: \frac{3}{4} - \frac{1}{3} = \frac{2}{12} [/tex]
[tex]d \: \frac{2}{5} \times \frac{3}{4} = \frac{6}{20} [/tex]
[tex]e \: \frac{3}{4} \div \frac{2}{5} = \frac{5}{20} [/tex]
