з) $$\frac{2}{3}$$ + 4$$\frac{3}{5}$$ = $$\frac{10}{15}$$ + 4$$\frac{9}{15}$$ = 4$$\frac{19}{15}$$ = 5$$\frac{4}{15}$$
Ответ: 5$$\frac{4}{15}$$