Question

Помогите плиз решить по

действиям только 3 пример

Answer 1

$3) 2 frac{1}{2} * 48 = 3 frac{2}{3} : frac{1}{18} + 5 frac{5}{12} : frac{7}{36} = 81 frac{6}{7}$

$48=frac{48}{1}$

$2 frac{1}{2} * frac{48}{1} = frac{5}{2} * frac{48}{1} = frac{5*48}{2*1}= frac{240}{2}=120$

$3 frac{2}{3}: frac{1}{18}=frac{11}{3} : frac{1}{18}= frac{11}{3}*frac{18}{1} = frac{11*18}{3*1}=frac{198}{3} = 66$

$5 frac{5}{12}:frac{7}{36}= frac{65}{12}: frac{7}{36}= frac{65}{12} * frac{36}{7}= frac{65*36}{12*7}= frac{2340}{84} = frac{2340:12}{84:12} = frac{195}{7} = 27 frac{6}{7}$

$120-66=54$

$54=frac{54}{1}$

$frac{54}{1}+ 27 frac{6}{7} = frac{54}{1}+ frac{195}{7}=frac{378}{7} + frac{195}{7}= frac{378+195}{7}= frac{573}{7} = 81 frac{6}{7}$