Выполним вычисления:
- 6$$\frac{5}{13}$$+2$$\frac{8}{13}$$ = (6+2)+($$\frac{5}{13}$$+$$\frac{8}{13}$$) = 8+$$\frac{13}{13}$$ = 8+1 = 9
- 1-\frac{15}{19} = \frac{19}{19}$$-$$\frac{15}{19}$$ = $$\frac{4}{19}$$
- 5$$\frac{4}{7}$$+3$$\frac{6}{7}$$ = (5+3)+($$\frac{4}{7}$$+$$\frac{6}{7}$$) = 8+$$\frac{10}{7}$$ = 8+1$$\frac{3}{7}$$ = 9$$\frac{3}{7}$$
- 8-3$$\frac{4}{9}$$ = 7$$\frac{9}{9}$$-3$$\frac{4}{9}$$ = (7-3)+($$\frac{9}{9}$$-$$\frac{4}{9}$$) = 4$$\frac{5}{9}$$
- 7$$\frac{3}{8}$$-2$$\frac{5}{8}$$ = 6$$\frac{11}{8}$$-2$$\frac{5}{8}$$ = (6-2)+($$\frac{11}{8}$$-$$\frac{5}{8}$$) = 4$$\frac{6}{8}$$ = 4$$\frac{3}{4}$$
- 14$$\frac{15}{32}$$-9$$\frac{19}{32}$$ = 13$$\frac{47}{32}$$-9$$\frac{19}{32}$$ = (13-9)+($$\frac{47}{32}$$-$$\frac{19}{32}$$) = 4$$\frac{28}{32}$$ = 4$$\frac{7}{8}$$
Ответ: 1) 9; 2) $$\frac{4}{19}$$; 3) 9$$\frac{3}{7}$$; 4) 4$$\frac{5}{9}$$; 5) 4$$\frac{3}{4}$$; 6) 4$$\frac{7}{8}$$