Выполните вычитание.
1) $-3\frac{1}{6} - (-2\frac{3}{8}) = -3\frac{1}{6} + $
2) $-5\frac{7}{20} - 2\frac{9}{25}$
3) $-4\frac{4}{15} - (-6\frac{5}{9})$
4) $1\frac{5}{7} - (-2\frac{3}{5})$
$-3\frac{1}{6} - (-2\frac{3}{8}) = -3\frac{1}{6} + 2\frac{3}{8} = -3\frac{4}{24} + 2\frac{9}{24} = -2\frac{28}{24} + 2\frac{9}{24} = -\frac{19}{24}$
$-5\frac{7}{20} - 2\frac{9}{25} = -5\frac{7}{20} + (-2\frac{9}{25}) = -5\frac{35}{100} + (-2\frac{36}{100}) = -7\frac{71}{100}$
$-4\frac{4}{15} - (-6\frac{5}{9}) = -4\frac{4}{15} + 6\frac{5}{9} = -4\frac{12}{45} + 6\frac{25}{45} = 2\frac{13}{45}$
$1\frac{5}{7} - (-2\frac{3}{5}) = 1\frac{5}{7} + 2\frac{3}{5} = 1\frac{25}{35} + 2\frac{21}{35} = 3\frac{46}{35} = 4\frac{11}{35}$