Реши примеры и сравни числа

1) Салыстыр: a) $-2 < -1$ б) $44.1 > 38.9$ в) $-\frac{1}{8} > -\frac{2}{5}$ г) $-1\frac{7}{8} > -1\frac{3}{4}$ 2) Есепте: a) $-12+(-8) = -20$ б) $-43 + 75 = 32$ в) $-\frac{8}{15} + (-\frac{4}{5}) : 2 = -\frac{8}{15} - \frac{4}{5} \cdot \frac{1}{2} = -\frac{8}{15} - \frac{2}{5} = -\frac{8}{15} - \frac{6}{15} = -\frac{14}{15}$ г) $-3\frac{11}{20} + (-2\frac{19}{30}) + 5\frac{7}{60} = -3\frac{33}{60} - 2\frac{38}{60} + 5\frac{7}{60} = -5\frac{71}{60} + 5\frac{7}{60} = -5 - \frac{71}{60} + 5 + \frac{7}{60} = - \frac{64}{60} = -1\frac{4}{60} = -1\frac{1}{15}$ д) $2\frac{3}{4} + (-9\frac{5}{6}) + \frac{5}{6} + 5\frac{9}{2} = 2\frac{9}{12} - 9\frac{10}{12} + \frac{10}{12} + 5\frac{54}{12} = -7\frac{1}{12} + \frac{10}{12} + 5\frac{54}{12} = -7\frac{1}{12} + 5\frac{64}{12} = -2 + \frac{63}{12} = -2 + 5\frac{3}{12} = 3\frac{1}{4}$