759-760 пожалуйста срочно !!!

Ответ:

$1)=\frac{\frac{3}{12}+\frac{8}{12}-\frac{6}{12} }{\frac{6}{12}-\frac{3}{12}+\frac{8}{12} } =\frac{\frac{5}{12} }{\frac{11}{12} } =\frac{5}{12}*\frac{12}{11} = \frac{5}{11} \\ \\ 2) =\frac{\frac{27}{45} -\frac{15}{45}-\frac{10}{45} }{\frac{7}{15}+\frac{10}{15}-\frac{12}{15} } =\frac{\frac{2}{45} }{\frac{5}{15} } =\frac{2}{45}*\frac{15}{5} = \frac{2}{15} [tex]\\ \\ 3) =\frac{\frac{16}{60}-\frac{10}{60}-\frac{5}{60} }{\frac{5}{60}+\frac{45}{60} -\frac{24}{60} } =\frac{\frac{1}{60} }{\frac{26}{60} } =\frac{1}{60} *\frac{60}{26} =\frac{1}{26}\\ \\ 4)=\frac{\frac{9}{24} +\frac{6}{24}+\frac{20}{24} }{\frac{12}{24} +\frac{16}{24}-\frac{3}{24} } =\frac{\frac{35}{24} }{\frac{25}{24} } =\frac{35}{24} *\frac{24}{25} =\frac{7}{5} =1\frac{2}{5}$

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