Вычислите значение выражения: а) 4 2/15 - 3 1/10 - 2 2/5; б) 24 2/35 - 18 5/14 - 5 3/10; в) 7 5/21 - 14 1/7 + 6 1/14; г) 1 2/9 + 2 5/6 - 35 1/5.

а) $$4 \frac{2}{15} - 3 \frac{1}{10} - 2 \frac{2}{5} = \frac{62}{15} - \frac{31}{10} - \frac{12}{5} = \frac{124}{30} - \frac{93}{30} - \frac{72}{30} = \frac{124-93-72}{30} = \frac{-41}{30} = -1 \frac{11}{30}$$ Ответ: $$-1 \frac{11}{30}$$ б) $$24 \frac{2}{35} - 18 \frac{5}{14} - 5 \frac{3}{10} = \frac{842}{35} - \frac{257}{14} - \frac{53}{10} = \frac{1684}{70} - \frac{1285}{70} - \frac{371}{70} = \frac{1684-1285-371}{70} = \frac{28}{70} = \frac{2}{5}$$ Ответ: $$\frac{2}{5}$$ в) $$7 \frac{5}{21} - 14 \frac{1}{7} + 6 \frac{1}{14} = \frac{152}{21} - \frac{99}{7} + \frac{85}{14} = \frac{304}{42} - \frac{594}{42} + \frac{255}{42} = \frac{304 - 594 + 255}{42} = \frac{-35}{42} = -\frac{5}{6}$$ Ответ: $$-\frac{5}{6}$$ г) $$1 \frac{2}{9} + 2 \frac{5}{6} - 35 \frac{1}{5} = \frac{11}{9} + \frac{17}{6} - \frac{176}{5} = \frac{110}{90} + \frac{255}{90} - \frac{3168}{90} = \frac{110 + 255 - 3168}{90} = \frac{-2803}{90} = -31 \frac{13}{90}$$ Ответ: $$-31 \frac{13}{90}$$