Помогите прошу вас!!!!!!!!! Номер 506 (5,6,7,8,9,10,11,12

5) $2\frac{1}{7} * 2 \frac{2}{15} = \frac{15}{7} *\frac{32}{15} =\frac{15*32}{7*15} =\frac{32}{7} = 4\frac{4}{7}$

6) $2\frac{2}{9} * 2\frac{19}{40} = \frac{20}{9} *\frac{99}{40} =\frac{11}{2}=5.5$

7) $2\frac{1}{10} * 2\frac{1}{7} =\frac{21}{10} *\frac{15}{7} =\frac{9}{2} =4.5$

8) $4\frac{1}{6} *1\frac{2}{5} =\frac{25}{6} *\frac{7}{5} =\frac{35}{6} =5\frac{5}{6}$

9) $1\frac{4}{7} * 2\frac{6}{11} =\frac{11}{7} *\frac{28}{11} =4$

10) $1\frac{1}{5} * 2\frac{11}{12} =\frac{6}{5} *\frac{35}{12} =\frac{7}{2} =3.5$

11) $7\frac{1}{2} * 7\frac{1}{15} =\frac{15}{2} *\frac{106}{15} =53$

12) $7\frac{5}{9} * 1\frac{1}{17} =\frac{68}{9} *\frac{18}{17} =8$