Question

70 баллов, решите плиз. по действиям

Answer 1

1)
$\frac{4}{5}+\frac{4}{493}*(7\frac{11}{12} +5\frac{7}{9} )$
$\frac{4}{5}+\frac{4}{493}*((7+5)+(\frac{11}{12}+\frac{7}{9}))$
$\frac{4}{5}+\frac{4}{493} *(12+\frac{61}{36} )$
$\frac{4}{5}+\frac{4}{493} *(12+1+\frac{25}{36} )$
$\frac{4}{5}+\frac{4}{493} *13\frac{25}{36}$
$\frac{4}{5}+\frac{4}{493} *\frac{493}{36}=\frac{41}{45}$
2)
$\frac{11}{14} +\frac{8}{15} :(4-2\frac{26}{27} )-1\frac{1}{10}$
$\frac{11}{14} +\frac{8}{15} :(4-2\frac{26}{27} )-\frac{11}{10}$
$\frac{11}{14} +\frac{8}{15} :\frac{28}{27}-\frac{11}{10}$
$\frac{11}{14} +\frac{8}{15} *\frac{27}{28}-\frac{11}{10}$
$\frac{11}{14} +\frac{2}{5} *\frac{9}{7}-\frac{11}{10}$
$\frac{11}{14} +\frac{18}{35}-\frac{11}{10}=\frac{55+36-77}{70}=\frac{1}{5}$
3)
$(5,625*1\frac{1}{3} -3\frac{11}{18} -\frac{5}{9}):1\frac{2}{3}$
$(\frac{45}{8} *\frac{4}{3} -\frac{65}{18} -\frac{5}{9} ):\frac{5}{3}$
$(\frac{15}{2} -\frac{65}{18} -\frac{5}{9} )*\frac{3}{5}$
$\frac{10}{3} *\frac{3}{5}$
$10*\frac{1}{5} =2$