Răspuns:
[tex]3.(4) + 0.(8) = \frac{34 - 3}{9} + \frac{8}{9} \\ \frac{31}{9} + \frac{8}{9} = \frac{39}{9} = \frac{13}{3} [/tex]
[tex](0.3 + \frac{2}{5} ) + (5 - \frac{21}{5} ) =( \frac{3}{10} + \frac{2}{5} ) + (5 - \frac{21}{5}) \\ (\frac{3}{10} + \frac{4}{10} ) + ( \frac{25}{5} - \frac{21}{5} ) = \frac{7}{10} + \frac{4}{5} = \frac{7}{10} + \frac{8}{10} = \frac{15}{10} = \frac{3}{2} [/tex]
