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