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Ответ:

[tex]1)6 \times \frac{3}{6} + 8 \times \frac{2}{8} = 3 + 2 = 5[/tex]

[tex]2) \frac{4}{5} \times \frac{4}{6} - \frac{2}{6} \times \frac{2}{5} = \frac{4}{5} \times \frac{2}{3} - \frac{1}{3} \times \frac{2}{5} = \frac{8}{15} - \frac{2}{15} = \frac{2}{5} [/tex]