2) Вычислите: 7 5/12 + 4 3/8; 9 5/6 − 2 3/4; 3 4/9 + 2 2/7.

1. \(7\frac{5}{12}+4\frac{3}{8}=7\frac{10}{24}+4\frac{9}{24}=11\frac{19}{24}\).
2. \(9\frac{5}{6}-2\frac{3}{4}=9\frac{10}{12}-2\frac{9}{12}=6\frac{1}{12}\).
3. \(3\frac{4}{9}+2\frac{2}{7}=5+\frac{4}{9}+\frac{2}{7}=5+\frac{28}{63}+\frac{18}{63}=5\frac{46}{63}\).

Ответ: \(11\frac{19}{24}\); \(6\frac{1}{12}\); \(5\frac{46}{63}\).