Автор - dimonkin64

(1целая 5/54-11/36)×3целых3/5 ×2целых 2/7-1целая2/7×1целая 5/9. решить по порядку действий​

Ответ

Автор - alina33138

(1 frac{5}{54}  -  frac{11}{36} ) times 3 frac{3}{5}   times 2 frac{2}{7}  - 1 frac{2}{7}  times 1 frac{5}{9}

1)

1 frac{5}{54}  -  frac{11}{36}  =  frac{59}{54}  -  frac{11}{36}  =  frac{118}{108}  -  frac{33}{108}  =  frac{85}{108}

 frac{85}{108}  times 3 frac{3}{5}  =  frac{85}{108}  times  frac{18}{5}  =  frac{1530}{540}  =  frac{17}{6}

 frac{17}{6}  times 2 frac{2}{7}  =  frac{17}{6}  times  frac{16}{7}  =  frac{272}{42}  =  frac{136}{21}

1 frac{2}{7}  times 1 frac{5}{9}  =  frac{9}{7}  times  frac{14}{9}  = 2

 frac{136}{21}  - 2 =  frac{136}{21}  -  frac{42}{21}  =  frac{94}{21}  = 4 frac{10}{21}

Ответ:

4 frac{10}{21}

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