Ответ:
Г)
$$5\frac{7}{9} - 3\frac{2}{9} = (5-3) + (\frac{7}{9} - \frac{2}{9}) = 2 + \frac{7-2}{9} = 2 + \frac{5}{9} = 2\frac{5}{9}$$
Г)
$$5\frac{7}{9} - 3\frac{2}{9} = (5-3) + (\frac{7}{9} - \frac{2}{9}) = 2 + \frac{7-2}{9} = 2 + \frac{5}{9} = 2\frac{5}{9}$$