Автор - frytik

помогите решить пример 5 класс

Ответ

Автор - grubrinat
 frac{(7-6 frac{7}{20}):6 frac{1}{2}+9 frac{9}{10}}{(1 frac{1}{5}:36+1 frac{1}{5}: frac{1}{4}-1 frac{5}{16}): frac{169}{24}}=20\  \ 1) 7-6 frac{7}{20}= frac{13}{20} \  \ 2)  frac{13}{20}:6 frac{1}{2}= frac{13}{20}* frac{2}{13}= frac{1}{10} \  \ 3)   frac{1}{10}+9 frac{9}{10}=10
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4)  1frac{1}{5}:36= frac{6}{5}* frac{1}{36}= frac{1}{30} \  \ 5)   1frac{1}{5}: frac{1}{4}=  frac{6}{5}* frac{4}{1}= frac{24}{5} \  \ 6) frac{1}{30}+frac{24}{5}= frac{1+144}{30}= frac{145}{30}=  frac{29}{6} \  \ 7) frac{29}{6}-1 frac{5}{16}=frac{29}{6}- frac{21}{16}=   frac{232-63}{48} = frac{169}{48} \  \ 8)frac{169}{48}: frac{169}{24}=frac{169}{48}* frac{24}{169}= frac{24}{48}= frac{1}{2}=0,5
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9)  frac{10}{0,5}= 20

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