Решение №2

а)

$$-9\frac{3}{4} : 1\frac{1}{12} = -\frac{39}{4} : \frac{13}{12} = -\frac{39}{4} * \frac{12}{13} = -\frac{3}{1} * \frac{3}{1} = -9$$

б)

$$13\frac{3}{5} : (-1,7) = \frac{68}{5} : (-\frac{17}{10}) = \frac{68}{5} * (-\frac{10}{17}) = \frac{4}{1} * (-\frac{2}{1}) = -8$$

в)

$$1\frac{1}{5} : (-12) = \frac{6}{5} : (-12) = \frac{6}{5} * (-\frac{1}{12}) = \frac{1}{5} * (-\frac{1}{2}) = -\frac{1}{10}$$

г)

$$-8\frac{4}{7} : 1\frac{4}{5} = -\frac{60}{7} : \frac{9}{5} = -\frac{60}{7} * \frac{5}{9} = -\frac{20}{7} * \frac{5}{3} = -\frac{100}{21} = -4\frac{16}{21}$$

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