№2. Вычислить: а) −9 3/4 : 1 1/22; б) 13 3/5 : (−1,7); в) 1 1/5 : (−1,2); г) −8 4/7 : 1 4/5.

1. \(-9\frac{3}{4} : 1\frac{1}{22} = -\frac{39}{4} : \frac{23}{22} = -\frac{39}{4} \cdot \frac{22}{23} = -\frac{429}{46} = -9\frac{15}{46}\).
2. \(13\frac{3}{5} : (-1,7) = 13,6 : (-1,7) = -8\).
3. \(1\frac{1}{5} : (-1,2) = \frac{6}{5} : \left(-\frac{6}{5}\right) = -1\).
4. \(-8\frac{4}{7} : 1\frac{4}{5} = -\frac{60}{7} : \frac{9}{5} = -\frac{60}{7} \cdot \frac{5}{9} = -\frac{100}{21} = -4\frac{16}{21}\).

Ответ: а) \(-9\frac{15}{46}\); б) −8; в) −1; г) \(-4\frac{16}{21}\).