[tex]a)\\3\frac{3}{7} - 7 = \frac{24}{7} - \frac{49}{7} = - \frac{25}{7} = -3\frac{4}{7}[/tex]
[tex]b) \\-5,4-(-6)=-5,4+6=0,6[/tex]
[tex]c) \\-\frac{3}{9} - 1\frac{1}{9} = -\frac{3}{9} - \frac{10}{9} = -\frac{13}{9} = -1\frac{4}{9}[/tex]
[tex]d) \\1\frac{4}{9} - 3\frac{5}{6} = \frac{13}{9} - \frac{23}{6} = \frac{26}{18} - \frac{69}{18} = -\frac{43}{18} = -2\frac{7}{18}[/tex]
[tex]e)\\-7\frac{1}{5} - (-3\frac{4}{7})= -\frac{36}{5} + \frac{25}{7} = - \frac{252}{35} + \frac{125}{35} = -\frac{127}{35} = - 3\frac{22}{35}[/tex]
[tex]f) -2\frac{1}{7} - (-5\frac{3}{4}) = -\frac{15}{7} + \frac{23}{4} = - \frac{60}{28} + \frac{161}{28} = \frac{101}{28} = 3 \frac{17}{28}[/tex]
[tex]g) \\-3\frac{1}{7} - 2\frac{3}{4} = -\frac{22}{7} - \frac{11}{4} = - \frac{88}{28} - \frac{77}{28} = - \frac{165}{28} = - 5\frac{25}{28}[/tex]
[tex]h) \\-2\frac{1}{3} + \frac{7}{8} = -\frac{7}{3} + \frac{7}{8} = - \frac{56}{24} + \frac{21}{24} = - \frac{35}{24} = -1 \frac{11}{24}[/tex]
