Выполните умножение или деление:
а) $0,12 * \frac{1}{15}$;
б) $\frac{5}{36} * 0,8$;
в) $1\frac{1}{6} : 1,4$;
г) $4,8 : \frac{6}{7}$;
д) $-1,44 * \frac{5}{12}$;
е) $0,28 : (-\frac{14}{17})$;
ж) $-2,2 : (-1\frac{1}{3})$;
з) $1\frac{1}{15} * (-0,5)$.
$0,12 * \frac{1}{15} = \frac{12}{100} * \frac{1}{15} = \frac{3}{25} * \frac{1}{15} = \frac{1}{25 * 5} = \frac{1}{125}$
$\frac{5}{36} * 0,8 = \frac{5}{36} * \frac{8}{10} = \frac{5}{36} * \frac{4}{5} = \frac{1}{9}$
$1\frac{1}{6} : 1,4 = \frac{7}{6} : \frac{14}{10} = \frac{7}{6} * \frac{10}{14} = \frac{7}{6} * \frac{5}{7} = \frac{5}{6}$
$4,8 : \frac{6}{7} = \frac{48}{10} * \frac{7}{6} = \frac{24}{5} * \frac{7}{6} = \frac{4}{5} * \frac{7}{1} = \frac{28}{5} = 5\frac{3}{5}$
$-1,44 * \frac{5}{12} = -1\frac{44}{100} * \frac{5}{12} = -\frac{144}{100} * \frac{5}{12} = -\frac{12}{20} * \frac{1}{1} = -\frac{3}{5}$
$0,28 : (-\frac{14}{17}) = \frac{28}{100} * (-\frac{17}{14}) = \frac{7}{25} * (-\frac{17}{14}) = -\frac{1 * 17}{25 * 2} = -\frac{3}{5}$
$-2,2 : (-1\frac{1}{3}) = -\frac{22}{10} : (-\frac{4}{3}) = \frac{11}{5} * \frac{3}{4} = \frac{33}{20} = 1\frac{13}{20}$
$1\frac{1}{15} * (-0,5) = \frac{16}{15} * (-\frac{1}{2}) = -\frac{8}{15}$
Пожауйста, оцените решение