Ответ:

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Пошаговое объяснение:

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[tex]1)7-\frac{4}{9} = 6\frac{5}{9} \\ 2)10 - 3\frac{5}{8} = 6\frac{3}{8} \\ 3)1\frac{2}{3} - \frac{4}{9} = 1\frac{6}{9} - \frac{4}{9} = 1\frac{2}{9}\\[/tex]
[tex]4) 4\frac{5}{6} - 1\frac{3}{4} = 4\frac{10}{12} - 1\frac{9}{12} = 3\frac{1}{12}\\ 5) 3\frac{1}{5} - \frac{1}{4} = 3\frac{4}{20} -\frac{5}{20} = 2\frac{19}{20}\\ 6)5\frac{3}{4}-1\frac{9}{10} = 5\frac{15}{20} - 1\frac{18}{20} = 3\frac{17}{20} \\ 7) 7\frac{3}{8}-4\frac{5}{12} = 7 \frac{9}{24} - 4\frac{10}{24} = 2\frac{23}{24}\\ 8)9\frac{3}{10} -6\frac{7}{15} = 9 \frac{9}{30} -6\frac{14}{30} = 2\frac{25}{30}[/tex]