Question

Помогите решить 3 примера

Answer 1

1)$\frac{3}{8} *12+\frac{5}{16} *8=\frac{3}{8}*\frac{12}{1} +\frac{5}{16} *\frac{8}{1} =\frac{9}{2} +\frac{5}{2} =\frac{14}{2} =7$

2)$2\frac{1}{9} *27=\frac{19}{9} *\frac{27}{1} =19*3=57$

3)$\frac{11}{12} *14-\frac{1}{14} *16=\frac{11}{12} *\frac{14}{1} -\frac{1}{14} *\frac{16}{1} =\frac{77(7}{6} -\frac{8(6}{7} =\frac{539-48}{42} =\frac{491}{42} =11\frac{29}{42}$