2. Найдите значения выражений. a) $$\frac{22}{23}-\frac{18}{23}+\frac{5}{23}$$; 6) $$8\frac{7}{9}+(7\frac{5}{9}-4\frac{4}{9})$$; в) $$11\frac{2}{19}-(3\frac{17}{19}+6\frac{14}{19})$$.

2. Найдите значения выражений.

a) $$\frac{22}{23}-\frac{18}{23}+\frac{5}{23}$$;

$$\frac{22}{23}-\frac{18}{23}+\frac{5}{23} = \frac{22-18+5}{23} = \frac{9}{23}$$

б) $$8\frac{7}{9}+(7\frac{5}{9}-4\frac{4}{9})$$;

$$8\frac{7}{9}+(7\frac{5}{9}-4\frac{4}{9}) = 8\frac{7}{9}+3\frac{1}{9} = 11\frac{8}{9}$$

в) $$11\frac{2}{19}-(3\frac{17}{19}+6\frac{14}{19})$$.

$$11\frac{2}{19}-(3\frac{17}{19}+6\frac{14}{19}) = 11\frac{2}{19}-10\frac{31}{19} = 11\frac{2}{19}-11\frac{12}{19} = \frac{211}{19}-\frac{221}{19} = -\frac{10}{19}$$

Ответ: а) $$\frac{9}{23}$$; б) $$11\frac{8}{9}$$; в) $$-\frac{10}{19}$$