Номер №8

$(4\frac{5}{11} + 8\frac{9}{11}) - (5\frac{7}{11} - 3\frac{8}{11}) + 1\frac{3}{11} = 12\frac{14}{11} - (4\frac{18}{11} - 3\frac{8}{11}) + 1\frac{3}{11} = 12\frac{14}{11} - 1\frac{10}{11} + 1\frac{3}{11} = 11\frac{4}{11} + 1\frac{3}{11} = 12\frac{7}{11}$

$4\frac{5}{11} + (8\frac{9}{11} - 5\frac{7}{11}) - 3\frac{8}{11} + 1\frac{3}{11} = 4\frac{5}{11} + 3\frac{2}{11} - 3\frac{8}{11} + 1\frac{3}{11} = 7\frac{7}{11} - 3\frac{8}{11} + 1\frac{3}{11} = 6\frac{18}{11} - 3\frac{8}{11} + 1\frac{3}{11} = 3\frac{10}{11} + 1\frac{3}{11} = 3\frac{10}{11} + 1\frac{3}{11} = 4\frac{13}{11} = 5\frac{2}{11}$

$4\frac{5}{11} + 8\frac{9}{11} - (5\frac{7}{11} - 3\frac{8}{11} + 1\frac{3}{11}) = 12\frac{14}{11} - (4\frac{18}{11} - 3\frac{8}{11} + 1\frac{3}{11}) = 12\frac{14}{11} - (1\frac{10}{11} + 1\frac{3}{11}) = 12\frac{14}{11} - 2\frac{13}{11} = 10\frac{1}{11}$