Question

помогите номер83!!;
пожалуйста

Answer 1

1)$(2 frac{3}{12} +3 frac{8}{12} ):(8 frac{5}{10} -1 frac{4}{10} )*1,2=5 frac{11}{12} :7 frac{1}{10} *1,2= frac{71}{12} * frac{10}{71} *1,2=$$frac{10}{12} * frac{12}{10} =1$
2)($( frac{25}{16} * frac{16}{5} + frac{5}{3} -9* frac{5}{12} ):(17 frac{7}{12} -6 frac{4}{12} )= (5+ frac{5}{3} -3 frac{3}{4} )* frac{12}{45} = frac{35}{12} * frac{12}{45} = frac{7}{9}$