Ответ:
- \(6\frac{4}{9}+3\frac{6}{9}=9\frac{10}{9}=10\frac{1}{9}\).
- \(10\frac{11}{19}+5\frac{14}{19}=15\frac{25}{19}=16\frac{6}{19}\).
- \(2\frac{3}{13}+2\frac{11}{13}=4\frac{14}{13}=5\frac{1}{13}\).
- \(1\frac{5}{8}+3\frac{7}{8}=4\frac{12}{8}=5\frac{1}{2}\).
- \(1-\frac{3}{11}=\frac{11}{11}-\frac{3}{11}=\frac{8}{11}\).
- \(1-\frac{13}{10}=\frac{10}{10}-\frac{13}{10}=-\frac{3}{10}\).
- \(4-1\frac{4}{7}=3\frac{7}{7}-1\frac{4}{7}=2\frac{3}{7}\).
