2. Найдите значение выражений: a) 5/11 - 3/11 + 7/11 б) 9 \(\frac{13}{19}\) + (8 \(\frac{18}{19}\) - 3 \(\frac{15}{19}\)) в) 18 \(\frac{4}{21}\) - (10 \(\frac{10}{21}\) + 3 \(\frac{19}{21}\)) г) 4/9 * 3/32 д) 27/56 : 5/7 e) 5 * 3/26 ж) 9/28 * 42 з) 4/9 : 7/8 и) 9 : 3/4 к) 1 : 4/3

a) \(\frac{5}{11} - \frac{3}{11} + \frac{7}{11} = \frac{5-3+7}{11} = \frac{9}{11}\) б) \(9 \frac{13}{19} + (8 \frac{18}{19} - 3 \frac{15}{19}) = 9 \frac{13}{19} + 5 \frac{3}{19} = 14 \frac{16}{19}\) в) \(18 \frac{4}{21} - (10 \frac{10}{21} + 3 \frac{19}{21}) = 18 \frac{4}{21} - 13 \frac{29}{21} = 18 \frac{4}{21} - 14 \frac{8}{21} = 3 \frac{17}{21}\) г) \(\frac{4}{9} \cdot \frac{3}{32} = \frac{4 \cdot 3}{9 \cdot 32} = \frac{12}{288} = \frac{1}{24}\) д) \(\frac{27}{56} : \frac{5}{7} = \frac{27}{56} \cdot \frac{7}{5} = \frac{27 \cdot 7}{56 \cdot 5} = \frac{27 \cdot 1}{8 \cdot 5} = \frac{27}{40}\) e) \(5 \frac{3}{26} = \frac{5 \cdot 26 + 3}{26} = \frac{133}{26}\) ж) \(\frac{9}{28} \cdot 42 = \frac{9 \cdot 42}{28} = \frac{9 \cdot 3}{2} = \frac{27}{2} = 13 \frac{1}{2}\) з) \(\frac{4}{9} : \frac{7}{8} = \frac{4}{9} \cdot \frac{8}{7} = \frac{4 \cdot 8}{9 \cdot 7} = \frac{32}{63}\) и) \(9 : \frac{3}{4} = 9 \cdot \frac{4}{3} = \frac{9 \cdot 4}{3} = \frac{36}{3} = 12\) к) \(1 : \frac{4}{3} = 1 \cdot \frac{3}{4} = \frac{3}{4}\)