Question

Помогите пжпжжпжпжпж срочно ​

Answer 1

Ответ и пошаговое объяснение:

$11.\\a)\ \dfrac{4}{5} : \dfrac{2}{15} = \dfrac{4}{5} * \dfrac{15}{2} = \dfrac{2}{1} * \dfrac{3}{1} = 6;\\\\b)\ \dfrac{1}{2} : \dfrac{3}{8} = \dfrac{1}{2} * \dfrac{8}{3} = \dfrac{1}{1} * \dfrac{4}{3} = \dfrac{4}{3};$

$12.\\a)\ \dfrac{3}{4} : \dfrac{3}{20} = \dfrac{3}{4} * \dfrac{20}{3} = \dfrac{1}{1} * \dfrac{5}{1} = 5;\\\\\\b)\ \dfrac{7}{10} : \dfrac{3}{20} = \dfrac{7}{10} * \dfrac{20}{3} = \dfrac{7}{1} * \dfrac{2}{3} = \dfrac{14}{3} = 4\dfrac{2}{3};$

$13.\\a)\ \dfrac{19}{100} : \dfrac{7}{10} = \dfrac{19}{100} * \dfrac{10}{7} = \dfrac{19}{10} * \dfrac{1}{7} = \dfrac{19}{70}; \\\\\\b)\ \dfrac{63}{1000} : \dfrac{37}{100} = \dfrac{63}{1000} * \dfrac{100}{37} = \dfrac{63}{10} * \dfrac{1}{37} = \dfrac{63}{370};$

$14.\\a)\ \dfrac{11}{27} : \dfrac{4}{9} = \dfrac{11}{27} * \dfrac{9}{4} = \dfrac{11}{3} * \dfrac{1}{4} = \dfrac{11}{12}; \\\\\\b)\ \dfrac{8}{11} : \dfrac{5}{44} = \dfrac{8}{11} * \dfrac{44}{5} = \dfrac{8}{1} * \dfrac{4}{5} = \dfrac{32}{5} = 6\dfrac{2}{5};$

$15.\\a)\ 2: \dfrac{3}{4} = \dfrac{2}{1} * \dfrac{4}{3} = \dfrac{8}{3} = 2\dfrac{2}{3}.$