Решение:
a) -3,6 - 4,7 = -8,3
б) 6,3 - (-8,1) = 6,3 + 8,1 = 14,4
в) \(4\frac{1}{3} - 5\frac{2}{7} = \frac{13}{3} - \frac{37}{7} = \frac{91 - 111}{21} = -\frac{20}{21}\)
г) \(-6\frac{5}{24} - ( -5\frac{13}{30}) = -6\frac{25}{120} + 5\frac{52}{120} = -1 + \frac{-25 + 52}{120} = -1 + \frac{27}{120} = -1 + \frac{9}{40} = -\frac{31}{40}\)