1) \(\frac{6}{28} + \frac{12}{28} + \frac{15}{28} = \frac{33}{28}\). 2) \(\frac{3}{37} + \frac{4}{37} - \frac{1}{37} + \frac{5}{37} + \frac{6}{37} = \frac{17}{37}\). 3) \(1 - \frac{2}{17} - \frac{3}{17} = \frac{12}{17}\). 4) \(10 - \frac{8}{17} = \frac{162}{17}\). 5) \(\frac{27}{24} - \frac{18}{51} = \frac{333}{408}\). 6) \(\frac{24}{32} - \frac{16}{24} = \frac{1}{4}\).