Question

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 =

Answer 1

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