Question

помогите пожалуйста срочно 7 и 2 и 8​

Answer 1

$\displaystyle 1)\frac{11}{12}:\frac{7}{24}:2\frac{2}{21}=\frac{11}{12}*\frac{24}{7}:\frac{44}{21}=11*\frac{2}{7}*\frac{21}{44}=2*\frac{3}{4}=\frac{3}{2}=1\frac{1}{2}=1,5\\\\ 2)4\frac{9}{38}*\frac{5}{23}:\frac{7}{19}=\frac{161}{38}*\frac{5}{23}*\frac{19}{7}=\frac{7}{2}*5*\frac{1}{7}=\frac{1}{2}*5=\frac{5}{2}=2\frac{1}{2}=2,5\\\\ 3)2\frac{16}{19}*2\frac{1}{9}:3\frac{3}{8}=\frac{54}{19}*\frac{19}{9}:\frac{27}{8}=6*\frac{8}{27}=2*\frac{8}{9}=\frac{16}{9}=1\frac{7}{9}$