Question

Математика 9 класс
Помогите

Answer 1

 $(5 frac{5}{10} - 2 frac{5}{6} ):4-1= \ (5 frac{15}{30} -2 frac{25}{30} ):4-1= \ 2 frac{20}{30} :4-1=2 frac{2}{3} :4-1= \ frac{8}{3} :4-1= frac{2}{3} -1=- frac{1}{3}$

$frac{0.3}{0.18} = frac{30}{18} = frac{5}{3} =1 frac{2}{3}$

$frac{13}{20} :0.2= frac{13}{20} : frac{2}{10} \ = frac{13*10}{20*2} = frac{13}{4} =3 frac{1}{4}$

$frac{(1.2+0.8)(1.2-0.8)}{1.4-1} = frac{(2*0.4)}{0.4} = frac{0.8}{0.4} = frac{8}{4} =2$