Question

помогите пожалуйста с дз срочно. номер 657

Answer 1

1) 5 действий
$1)3 frac{1}{3} + 5 frac{1}{6} = 3 frac{2}{6} + 5 frac{1}{6} = 8 frac{3}{6} = 8 frac{1}{2}$
$2)8 frac{1}{2} times frac{2}{5} = frac{17}{2} times frac{2}{5} = frac{17}{5} = 3 frac{2}{5}$
$3)1 frac{1}{2} - frac{2}{5} = 1 frac{5}{10} - frac{4}{10} = 1 frac{1}{10}$
$4)2 frac{3}{4 } div 1 frac{1}{10} = frac{11}{4} div frac{11}{10} = frac{11}{4} times frac{10}{11} = \ frac{10}{4} = 2 frac{2}{4} = 2 frac{1}{2}$
$5)3 frac{2}{5} - 2 frac{1}{2} = 3 frac{4}{10} - 2 frac{5}{10} = \ 2 frac{14}{10} - 2 frac{5}{10} = \ frac{9}{10}$
3) 4 действия
$1) frac{1}{8} + frac{2}{9} - frac{1}{4} = frac{9}{72} + frac{16}{72} - frac{18}{72} = \ frac{7}{72}$
$2) frac{7}{9} - frac{2}{3} + frac{1}{6} = frac{14}{18} - frac{12}{18} + frac{3}{18} = \ frac{5}{18}$
$3) frac{7}{72} times 5 frac{1}{7} = frac{7}{72} times frac{36}{7} = frac{1}{2}$
$4) frac{1}{2} div frac{5}{18} = frac{1}{2} times frac{18}{5} = frac{9}{5} = 1 frac{4}{5}$