1) $$3\frac{1}{3}+4\frac{5}{11}+5\frac{1}{3}+1\frac{6}{11}=3\frac{1}{3}+5\frac{1}{3}+4\frac{5}{11}+1\frac{6}{11}=8\frac{2}{3}+5\frac{11}{11}=8\frac{2}{3}+6=14\frac{2}{3}$$
2) $$2\frac{5}{8}+3\frac{1}{5}+1\frac{3}{8}+5\frac{4}{5}=2\frac{5}{8}+1\frac{3}{8}+3\frac{1}{5}+5\frac{4}{5}=3\frac{8}{8}+8\frac{5}{5}=4+9=13$$
Ответ: 1) 14$$\frac{2}{3}$$; 2) 13.