2. Выполните действия: 1) \(\frac{9}{21} - \frac{3}{21} + \frac{11}{21}\) 2) 1 - \(\frac{27}{41}\) 3) 6 \(\frac{5}{15}\) - 4 \(\frac{7}{15}\) 4) 9 \(\frac{10}{27}\) - 6 \(\frac{4}{27}\) + 2 \(\frac{24}{27}\)

2. Выполните действия:

1) \(\frac{9}{21} - \frac{3}{21} + \frac{11}{21} = \frac{9-3+11}{21} = \frac{17}{21}\)

2) \(1 - \frac{27}{41} = \frac{41}{41} - \frac{27}{41} = \frac{41-27}{41} = \frac{14}{41}\)

3) \(6 \frac{5}{15} - 4 \frac{7}{15} = 6 + \frac{5}{15} - 4 - \frac{7}{15} = 2 + \frac{5}{15} - \frac{7}{15} = 2 - \frac{2}{15} = 1 + \frac{15}{15} - \frac{2}{15} = 1 \frac{13}{15}\)

4) \(9 \frac{10}{27} - 6 \frac{4}{27} + 2 \frac{24}{27} = 9 + \frac{10}{27} - 6 - \frac{4}{27} + 2 + \frac{24}{27} = 5 + \frac{10 - 4 + 24}{27} = 5 + \frac{30}{27} = 5 + \frac{27}{27} + \frac{3}{27} = 6 \frac{3}{27} = 6 \frac{1}{9}\)

Ответ: 1) \(\frac{17}{21}\); 2) \(\frac{14}{41}\); 3) \(1 \frac{13}{15}\); 4) \(6 \frac{1}{9}\)