a) \(4,5 - 5,7 = -1,2\)
б) \(-6,3 - 5,9 = -12,2\)
в) \(-4,2 - (-2,9) = -4,2 + 2,9 = -1,3\)
г) \(\frac{7}{11} - \frac{21}{22} = \frac{14}{22} - \frac{21}{22} = -\frac{7}{22}\)
д) \(-2 \frac{1}{4} - 2 \frac{1}{8} = -\frac{9}{4} - \frac{17}{8} = -\frac{18}{8} - \frac{17}{8} = -\frac{35}{8} = -4 \frac{3}{8}\)
е) \(-\frac{9}{14} - (-\frac{5}{7}) = -\frac{9}{14} + \frac{5}{7} = -\frac{9}{14} + \frac{10}{14} = \frac{1}{14}\)
ж) \(-2,5 - (-2 \frac{3}{4}) = -2,5 + 2,75 = 0,25\)
з) \(-\frac{2}{3} + 1,5 = -\frac{2}{3} + \frac{3}{2} = -\frac{4}{6} + \frac{9}{6} = \frac{5}{6}\)