Question

Помогите решить примеры по математике

Answer 1

$3frac{1}{9}: 2frac{1}{3}: 6frac{3}{4}* frac{9}{16}= frac{28}{9}:frac{7}{3}: frac{27}{4}* frac{9}{16}= frac{28}{9}* frac{3}{7}* frac{4}{27} * frac{9}{16}= frac{28*3*4*9}{9*7*27*16} = \ = frac{4*7*3*4*9}{9*7*3*9*4*4} = frac{1}{9}$


$4:4 frac{4}{5} +2 frac{2}{7} *5 frac{1}{4} -7 frac{11}{12} = 4 frac{11}{12} \ \ 1)4:4 frac{4}{5}=4: frac{24}{5}= frac{4}{1} * frac{5}{24} = frac{4}{1}* frac{5}{6*4}= frac{5}{6} ; \ 2)2 frac{2}{7} *5 frac{1}{4}=frac{16}{7} * frac{21}{4}=frac{4*4}{7} * frac{7*3}{4}=12; \ 3)frac{5}{6} +12=12frac{5}{6} ; \ 4)12frac{5}{6}-7 frac{11}{12}=12frac{10}{12}-7 frac{11}{12}=11frac{22}{12}-7 frac{11}{12}=4 frac{11}{12} .$


$(3 frac{3}{8}- frac{1}{4} ):4 frac{1}{6} *1 frac{7}{9} =1 frac{1}{3} \ \ 1)3 frac{3}{8}- frac{1}{4} =3 frac{3}{8}- frac{2}{8} =3 frac{1}{8} ; \ 2)3 frac{1}{8}:4 frac{1}{6}= frac{25}{8}: frac{25}{6}= frac{25}{8}*frac{6}{25}= frac{3}{4} ; \ 3) frac{3}{4}*1 frac{7}{9} = frac{3}{4}* frac{16}{9}= frac{4}{3} =1 frac{1}{3}.$

Answer 2

спасибо