Найдите значение выражения:
1) $15\frac{4}{9} - 4\frac{4}{9} * 3\frac{3}{8}$;
2) $\frac{81}{88} * (6 - 1\frac{13}{15} * 1\frac{19}{21})$;
3) $(5\frac{1}{16} - 1\frac{1}{8}) * (\frac{5}{6} + \frac{3}{14})$;
4) $5\frac{1}{16} - 1\frac{1}{8} * (\frac{5}{6} + \frac{3}{14})$.
$15\frac{4}{9} - 4\frac{4}{9} * 3\frac{3}{8} = 15\frac{4}{9} - \frac{40}{9} * \frac{27}{8} = 15\frac{4}{9} - \frac{5}{1} * \frac{3}{1} = 15\frac{4}{9} - 15 = \frac{4}{9}$
$\frac{81}{88} * (6 - 1\frac{13}{15} * 1\frac{19}{21}) = \frac{81}{88} * (6 - \frac{28}{15} * \frac{40}{21}) = \frac{81}{88} * (6 - 1\frac{13}{15} * 1\frac{19}{21}) = \frac{81}{88} * (6 - \frac{4}{3} * \frac{8}{3}) = \frac{81}{88} * (5\frac{9}{9} - 3\frac{5}{9}) = \frac{81}{88} * \frac{22}{9} = \frac{9}{4} * \frac{1}{1} = 2\frac{1}{4}$
$(5\frac{1}{16} - 1\frac{1}{8}) * (\frac{5}{6} + \frac{3}{14}) = (4\frac{17}{16} - 1\frac{2}{16}) * (\frac{35}{42} + \frac{9}{42}) = 3\frac{15}{16} * \frac{44}{42} = \frac{63}{16} * \frac{22}{21} = \frac{3}{8} * \frac{11}{1} = \frac{33}{8} = 4\frac{1}{8}$
$5\frac{1}{16} - 1\frac{1}{8} * (\frac{5}{6} + \frac{3}{14}) = 5\frac{1}{16} - \frac{9}{8} * (\frac{35}{42} + \frac{9}{42}) = 5\frac{1}{16} - \frac{9}{8} * \frac{22}{21} = 5\frac{1}{16} - \frac{3}{4} * \frac{11}{7} = 5\frac{1}{16} - \frac{33}{28} = 5\frac{1}{16} - 1\frac{5}{28} = 4\frac{1}{16} - \frac{5}{28} = 4\frac{7}{112} - \frac{20}{112} = 3\frac{119}{112} - \frac{20}{112} = 3\frac{99}{112}$
Пожауйста, оцените решение
