a)
[tex](-100)*\frac{8}{25} = (-\frac{100}{1}) * \frac{8}{25} = -\frac{800}{25} = -32\\[/tex]
b)
[tex]\frac{5}{2} * (-\frac{6}{25}) = -\frac{30}{50} = -\frac{3}{5} = -0,6[/tex]
c)
[tex](-\frac{12}{5})*(-\frac{15}{4})= \frac{180}{20} = 9[/tex]
d)
[tex](-9,45)*0,28=- \frac{945}{100} * \frac{28}{100}= - \frac{26460}{10000} = -2.646[/tex]
e)
[tex]0,04*(-0,27)=\frac{4}{100} * - \frac{27}{100} = - \frac{108}{10000} = -0,0108[/tex]
f)
[tex](-3,6)*\frac{4}{9} = -\frac{36}{10} * \frac{4}{9} = - \frac{12}{5} * \frac{2}{3} = - \frac{24}{15} = -1\frac{9}{15} = -1\frac{3}{5}[/tex]
g)
[tex](-2,1)*(-4\frac{2}{7})=-\frac{21}{10}*(-\frac{30}{7}) = - \frac{3}{1} * (-\frac{3}{1} ) = 9[/tex]
h)
[tex]-\frac{7}{8} : (-5,6) = -\frac{7}{8} : (-\frac{56}{10}) = -\frac{7}{1} * (-\frac{10}{7}) = 10[/tex]
i)
[tex]\frac{9}{10} : (-\frac{3}{4}) = \frac{9}{10} * (-\frac{4}{3} ) = \frac{3}{5} * (-\frac{2}{1}) = -\frac{6}{5} = -1\frac{1}{5} = -1,2[/tex]
j)
[tex](-\frac{3}{2}) :(-\frac{6}{100}) = (-\frac{3}{2} )*(-\frac{100}{6})=(-\frac{1}{1}) *(-\frac{50}{2}) = \frac{50}{2} = 25[/tex]
