Question

$1 frac{11}{15} +(5 frac{7}{20}*4.5+8.9*4 frac{1}{2}):3.75* frac{7}{9}$.  
Помогите плизз

Answer 1

1.5 7/20·4.5+8.9·4 1/2=(5,35+8,9)·4,5=14,25·4,5=64,125
2.64,125:3,35=17,1
3.17,1·7/9=13,3
4.1 11/15+13,3=1 11/15+ 13 3/10= 14  (11·2+3·3)/30=14 31/30=15 1/30

Answer 2

$1frac{11}{15}+(5frac{7}{20}*4,5+8,9*4frac{1}{2}):3,75*frac{7}{9}=\frac{26}{15}+frac{4,5(5frac{7}{20}+8,9)}{3,75}*frac{7}{9}=frac{26}{15}+frac{4,5*3,8}{1}*frac{7}{9}=frac{26}{15}+frac{17,1*7}{9}=frac{26}{15}+13,3=\frac{52}{30}+frac{399}{30}=frac{451}{30}=15frac{1}{30}$