481. Вычислите: 1) 2 7/9 - 1/3; 2) 3 4/5 - 2/3; 3) 4 5/6 - 2 1/3; 4) 6 4/5 - 2 3/8; 5) 9 1/2 - 4 3/8; 6) 8 19/20 - 5 7/20.

1) \(2\frac{7}{9} - \frac{1}{3} = \frac{25}{9} - \frac{3}{9} = \frac{22}{9} = 2\frac{4}{9}\)

2) \(3\frac{4}{5} - \frac{2}{3} = \frac{19}{5} - \frac{2}{3} = \frac{57}{15} - \frac{10}{15} = \frac{47}{15} = 3\frac{2}{15}\)

3) \(4\frac{5}{6} - 2\frac{1}{3} = \frac{29}{6} - \frac{7}{3} = \frac{29}{6} - \frac{14}{6} = \frac{15}{6} = 2\frac{3}{6} = 2\frac{1}{2}\)

4) \(6\frac{4}{5} - 2\frac{3}{8} = \frac{34}{5} - \frac{19}{8} = \frac{272}{40} - \frac{95}{40} = \frac{177}{40} = 4\frac{17}{40}\)

5) \(9\frac{1}{2} - 4\frac{3}{8} = \frac{19}{2} - \frac{35}{8} = \frac{76}{8} - \frac{35}{8} = \frac{41}{8} = 5\frac{1}{8}\)

6) \(8\frac{19}{20} - 5\frac{7}{20} = \frac{179}{20} - \frac{107}{20} = \frac{72}{20} = 3\frac{12}{20} = 3\frac{3}{5}\)

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