[tex](-3\frac{1}{4})-2\frac{7}{10} = -3\frac{5}{20} -2\frac{14}{20} = -5\frac{19}{20}\\\\(-5\frac{5}{8})-2\frac{1}{6} = -5\frac{15}{24}-2\frac{4}{24} =-7\frac{19}{24}\\\\1\frac{9}{10} + 3\frac{3}{5} = 1\frac{9}{10}+3\frac{6}{10} = 4\frac{15}{10} = 5\frac{5}{10} = 5\frac{1}{2}\\\\(-3\frac{5}{12})-5\frac{5}{8} = -3\frac{10}{24}-5\frac{15}{24} = -8\frac{25}{24} = -9\frac{1}{4}[/tex]
[tex](-1\frac{7}{10})-6\frac{1}{4} = -1\frac{14}{20} -6\frac{5}{20} = -7\frac{19}{20}\\\\(-5\frac{7}{8})-2\frac{1}{6} = -5\frac{21}{24}-2\frac{4}{24} = -7\frac{25}{24} = -8\frac{1}{24}[/tex]
