442. Решите примеры. 3 7 711+211 4 8-5 7 1 7 4+38 2 9 19 12 3 6 810+310 5유+2 12-5 17 711 7 -4 13 6 5 12 6 517-17

Решим примеры:

1. $$7\frac{3}{11} + 2\frac{7}{11} = (7 + 2) + (\frac{3}{11} + \frac{7}{11}) = 9 + \frac{10}{11} = 9\frac{10}{11}$$
2. $$8\frac{4}{9} - 5\frac{1}{9} = (8 - 5) + (\frac{4}{9} - \frac{1}{9}) = 3 + \frac{3}{9} = 3 + \frac{1}{3} = 3\frac{1}{3}$$
3. $$4\frac{7}{8} + 3\frac{7}{8} = (4 + 3) + (\frac{7}{8} + \frac{7}{8}) = 7 + \frac{14}{8} = 7 + 1\frac{6}{8} = 7 + 1\frac{3}{4} = 8\frac{3}{4}$$
4. $$6\frac{5}{9} - 1\frac{2}{9} = (6 - 1) + (\frac{5}{9} - \frac{2}{9}) = 5 + \frac{3}{9} = 5 + \frac{1}{3} = 5\frac{1}{3}$$
5. $$5\frac{8}{17} + 2\frac{12}{17} = (5 + 2) + (\frac{8}{17} + \frac{12}{17}) = 7 + \frac{20}{17} = 7 + 1\frac{3}{17} = 8\frac{3}{17}$$
6. $$7\frac{11}{13} - 4 = (7 - 4) + \frac{11}{13} = 3\frac{11}{13}$$
7. $$8\frac{3}{10} + 3\frac{6}{10} = (8 + 3) + (\frac{3}{10} + \frac{6}{10}) = 11 + \frac{9}{10} = 11\frac{9}{10}$$
8. $$12\frac{11}{12} - 5\frac{5}{12} = (12 - 5) + (\frac{11}{12} - \frac{5}{12}) = 7 + \frac{6}{12} = 7 + \frac{1}{2} = 7\frac{1}{2}$$
9. $$5\frac{6}{17} - \frac{6}{17} = 5 + (\frac{6}{17} - \frac{6}{17}) = 5 + 0 = 5$$

Ответ: 1) $$9\frac{10}{11}$$, 2) $$3\frac{1}{3}$$, 3) $$8\frac{3}{4}$$, 4) $$5\frac{1}{3}$$, 5) $$8\frac{3}{17}$$, 6) $$3\frac{11}{13}$$, 7) $$11\frac{9}{10}$$, 8) $$7\frac{1}{2}$$, 9) 5