9. Выполните вычитание: a) -3,6-4,7 в) 4 1/3 - 5 2/7 б) 6,3-(-8,1) г) -6 5/24 - (-5 13/30)

a) -3.6 - 4.7 = -8.3 б) 6.3 - (-8.1) = 6.3 + 8.1 = 14.4 в) \(4\frac{1}{3} - 5\frac{2}{7} = \frac{13}{3} - \frac{37}{7} = \frac{91}{21} - \frac{111}{21} = -\frac{20}{21}\) г) \(-6\frac{5}{24} - \left(-5\frac{13}{30}\right) = -6\frac{5}{24} + 5\frac{13}{30} = -6\frac{25}{120} + 5\frac{52}{120} = -1 + \frac{-25 + 52}{120} = -1 + \frac{27}{120} = -1 + \frac{9}{40} = -\frac{40}{40} + \frac{9}{40} = -\frac{31}{40}\)