Выполните действия над дробями.1) ( 5/9 + 7/9 + 4/9 ) - 1 2/9 = 2) ( 2 7/12 - 1 5/12 ) + 5/6 = 3) 2 7/8 + 1 5/8 - 4 1/2 =

[latex]1) ( \frac{5}{9} + \frac{7}{9} + \frac{4}{9} )-1 \frac{2}{9} = \frac{5+7+4}{9} - \frac{11}{9} = \frac{16}{9} - \frac{11}{9} = \frac{5}{9} [/latex] [latex]2) (2 \frac{7}{12} -1 \frac{5}{12} )+ \frac{5}{6} = \frac{31-17}{12} + \frac{5}{6} = \frac{14}{12}+ \frac{5}{6} = \frac{7}{6} + \frac{5}{6} = \frac{12}{6} =2[/latex] [latex]3) 2 \frac{7}{8} +1 \frac{5}{8} -4 \frac{1}{2} = \frac{23}{8} + \frac{13}{8} - \frac{9}{2} = \frac{23+13-36}{8} = \frac{0}{8} =0[/latex]