Răspuns :
[tex] \frac{4}{5} + \frac{1}{2} + \frac{3}{10} = \frac{8 + 5}{10} + \frac{3}{10} = \frac{16}{10} = \frac{8}{5} [/tex]
[tex]\frac{4}{5} +\frac{1}{2} +\frac{3}{10} =\\\\\frac{8}{10} +\frac{5}{10} +\frac{3}{10} =\\\\\frac{16}{10} =\frac{8}{5}[/tex]