Question

срочно!!!!!!!!!!!!!!​

Answer 1

$10)4\frac{2}{7}-1\frac{4}{9} =\frac{30}{7} -\frac{13}{9} =\frac{9*30-7*13}{63} =\frac{270-91}{63} =\frac{179}{63} =2\frac{53}{63} \\\\11)8\frac{3}{4} *1\frac{3}{14} =\frac{35}{4} *\frac{17}{14} =\frac{5}{4} *\frac{17}{2} =\frac{85}{8}=10\frac{5}{8} \\\\12)1\frac{3}{5} :5\frac{1}{3} =\frac{8}{5} :\frac{16}{3} =\frac{8}{5}*\frac{3}{16}=\frac{3}{10}$