Ответ:
- \(4\frac{6}{8}+1\frac{6}{3}=4\frac{3}{4}+3=7\frac{3}{4}\).
- \(10\frac{2}{13}+10\frac{5}{13}=20\frac{7}{13}\).
- \(1\frac{2}{7}+5\frac{7}{7}=1\frac{2}{7}+6=7\frac{2}{7}\).
- \(13\frac{5}{9}+13\frac{3}{9}=26\frac{8}{9}\).
Ответ: \(7\frac{3}{4};\ 20\frac{7}{13};\ 7\frac{2}{7};\ 26\frac{8}{9}\).
