a) $$\frac{10}{11} - \frac{4}{11} + \frac{3}{11} = \frac{10 - 4 + 3}{11} = \frac{9}{11}$$
Ответ: $$\frac{9}{11}$$
б) $$4\frac{5}{9} + 3\frac{8}{9} = 4 + 3 + \frac{5}{9} + \frac{8}{9} = 7 + \frac{13}{9} = 7 + 1\frac{4}{9} = 8\frac{4}{9}$$
Ответ: $$8\frac{4}{9}$$
в) $$6\frac{2}{8} - 2\frac{3}{8} = 6 - 2 + \frac{2}{8} - \frac{3}{8} = 4 - \frac{1}{8} = 3\frac{8}{8} - \frac{1}{8} = 3\frac{7}{8}$$
Ответ: $$3\frac{7}{8}$$
г) $$5\frac{6}{13} - 1\frac{11}{13} = 5 - 1 + \frac{6}{13} - \frac{11}{13} = 4 - \frac{5}{13} = 3\frac{13}{13} - \frac{5}{13} = 3\frac{8}{13}$$
Ответ: $$3\frac{8}{13}$$