Question

 решите 37/48:5 2/7 - 19/42 * 7/8 + 4 1/5

Answer 1

$frac{37}{48} :5 frac{2}{7} - frac{19}{42} * frac{7}{8} +4 frac{1}{5}=3 frac{19}{20}$
1)$frac{37}{48} :5 frac{2}{7} = frac{37}{48} : frac{37}{7} = frac{37}{48} * frac{7}{37}= frac{7}{48}$
2)$frac{19}{42} * frac{7}{8} = frac{19}{48}$
3)$frac{7}{48 }- frac{19}{48} =- frac{12}{48} =- frac{1}{4}$
4)$- frac{1}{4} +4 frac{1}{5}=- frac{1}{4} + frac{21}{5} = frac{79}{20} =3 frac{19}{20}$