Question

Помогите решить все 3 задачи

Answer 1

$4\frac{4}{9} / \frac{4}{9} - 1\frac{1}{2} *3\frac{1}{3}= \frac{40}{9}* \frac{9}{4}-\frac{3}{2} *3*\frac{1}{3}=10-\frac{1}{2} *3=10-\frac{3}{2} = 8 \frac{1}{2} \\\\1\frac{1}{7} * 1\frac{1}{8} *1\frac{1}{9}*1\frac{1}{10}*1\frac{1}{11}*1\frac{1}{12}*1\frac{1}{13} =\frac{8}{7} *\frac{1}{8}*\frac{1}{9} *\frac{1}{10} *\frac{1}{11} *\frac{1}{12}*\frac{1}{13} = \frac{1}{7} *\frac{1}{9} *\frac{1}{10} *\frac{1}{11}*\frac{1}{12} *\frac{1}{13} =\\\ \frac{1}{1081080}$$7\frac{3}{5} / 2\frac{4}{5} =\frac{38}{5} *\frac{1}{2} *\frac{4}{5} =\frac{19}{5} *\frac{4}{5}=\frac{76}{25} =3\frac{1}{25} \\\\3\frac{1}{2} / 1\frac{1}{6} =\frac{7}{2}*\frac{1}{6} =\frac{7}{12} \\\\2\frac{2}{5} *1\frac{1}{4} =\frac{12}{5} *\frac{1}{4} =\frac{3}{5}\\\\1\frac{1}{7} *2\frac{3}{4} =\frac{8}{7} *2\frac{3}{4} =\frac{2}{7}*2*3=\frac{12}{7} = 1\frac{5}{7}$