Ответ:
- \(\frac{7}{8}+\frac{8}{19}=\frac{133+64}{152}=\frac{197}{152}=1\frac{45}{152}\).
- \(\frac{8}{68}+\frac{9}{5}=\frac{2}{17}+\frac{9}{5}=\frac{10+153}{85}=\frac{163}{85}=1\frac{78}{85}\).
- \(\frac{5}{16}+\frac{7}{16}=\frac{12}{16}=\frac{3}{4}\).
- \(12\frac{8}{13}-8\frac{4}{13}=4\frac{4}{13}\).
- \(\frac{17-8+4}{21}=\frac{13}{21}\).
- \(14\frac{8}{10}+5\frac{1}{10}-6\frac{7}{10}=13\frac{2}{10}=13\frac{1}{5}\).
Ответ: 1) \(1\frac{45}{152}\); 2) \(1\frac{78}{85}\); 3) \(\frac{3}{4}\); 4) \(4\frac{4}{13}\); 5) \(\frac{13}{21}\); 6) \(13\frac{1}{5}\).
