Question

Помагите решить примеры: в) и г)

Answer 1

$frac{17}{18} ( - 1 frac{4}{7}) - ( - frac{4}{21})( - 1 frac{1}{6}) = frac{17}{18}( - frac{11}{7}) - ( - frac{4}{21})( - frac{7}{6}) = - frac{187}{126} - frac{2}{3} = - frac{187}{126} - frac{84}{126} = - frac{271}{126} = - 2 frac{19}{126}$

$( - 1 frac{7}{8} - 1 frac{4}{5} + frac{9}{16})( - frac{8}{9}) = ( - frac{15}{8} - frac{9}{5} + frac{9}{16} )( - frac{8}{9}) = ( - frac{150}{80} - frac{144}{80} + frac{45}{80})( - frac{8}{9}) = ( - frac{249}{80})( - frac{8}{9}) = frac{83}{30} = 2 frac{23}{30}$