найдите разность 9 8/17 - 5, 8 - 5/19, 9 - 5 1/2, 6 - 8/9

[tex]9 \frac{8}{17} -5= \frac{9*8}{17} - \frac{5*17}{17} = \frac{72-85}{17} =- \frac{13}{17} \\ \\ 8- \frac{5}{19} = \frac{8*19}{19} - \frac{5}{19} = \frac{152-5}{19} = \frac{147}{19} =7 \frac{14}{19} \\ \\ 9-5 \frac{1}{2} = \frac{9*2}{2} - \frac{5}{2} = \frac{18-5}{2} = \frac{13}{2} =6 \frac{1}{2} \\ \\ 6- \frac{8}{9} = \frac{6*9}{9} - \frac{8}{9} = \frac{54-8}{9} = \frac{46}{9} =5 \frac{1}{9}[/tex]