3. Выполните действия: \frac{5}{11} + \frac{5}{17} a); 1 - \frac{11}{27} 6); 6\frac{13}{16}+5\frac{3}{16} B)

Ответ: a) \(\frac{140}{187}\); б) \(\frac{16}{27}\); в) 12

а) \(\frac{5}{11} + \frac{5}{17} = \frac{5 \cdot 17 + 5 \cdot 11}{11 \cdot 17} = \frac{85 + 55}{187} = \frac{140}{187}\)

б) \(1 - \frac{11}{27} = \frac{27}{27} - \frac{11}{27} = \frac{27 - 11}{27} = \frac{16}{27}\)

в) \(6\frac{13}{16} + 5\frac{3}{16} = (6 + 5) + (\frac{13}{16} + \frac{3}{16}) = 11 + \frac{16}{16} = 11 + 1 = 12\)

Ответ: a) \(\frac{140}{187}\); б) \(\frac{16}{27}\); в) 12