Question

Срочно пожалуйста!!!! ( дам 14 баллов)

Answer 1

( а )

$\displaystyle\\\\(-\frac{1}{3}+\frac{1}{2})*0,6 -0,6:(-\frac{3}{5})=-0,9 \\\\\\1)-\frac{1}{3} +\frac{1}{2} =-\frac{1*2}{3*2} +\frac{1*3}{2*3}=-\frac{2}{6} +\frac{3}{6} =\frac{3}{6} -\frac{2}{6}=\frac{1}{6}\\ \\ \\2) \frac{1}{6} *0,6=\frac{1}{6} *\frac{6}{10} =\frac{1}{1} *\frac{1}{10}=\frac{1}{10}=0,1\\ \\ \\3)-0,6:(-\frac{3}{5} )=-0,6*(-\frac{5}{3} )=-\frac{6}{10} *(-\frac{5}{3} )=-\frac{2}{2} *(-\frac{1}{1} )=\frac{2}{2} =1\\\\\\4)0,1-1=-0,9$

( б )

$\displaystyle\\-5:((-\frac{1}{5}-\frac{3}{4}):(-1,9)+\frac{1}{6}:(-2))=-12\\ \\ \\ 1)-\frac{1}{5} -\frac{3}{4}=-\frac{1*4}{5*4} -\frac{3*5}{4*5} =-\frac{4}{20} -\frac{15}{20} =-\frac{19}{20}\\ \\ \\2)-\frac{19}{20} :(1,9)=-\frac{19}{20} :(-\frac{19}{10} )=-\frac{19}{20}* (-\frac{10}{19} )=-\frac{1}{2} *(-\frac{1}{1} )=\frac{1}{2}\\ \\\\3)\frac{1}{6}:(-2)=\frac{1}{6} :(-\frac{2}{1} )=\frac{1}{6} *(-\frac{1}{2} ) =-\frac{1}{12}$

$\displaystyle\\4)\frac{1}{2}+(-\frac{1}{12})=\frac{1*6}{2*6} -\frac{1}{12}=\frac{6}{12}-\frac{1}{12} =\frac{5}{12}\\ \\ \\ 5)-5:\frac{5}{12}=-\frac{5}{1} :\frac{5}{12} =-\frac{5}{1} *\frac{12}{5} =-\frac{1}{1} *\frac{12}{1} =-1*12=-12$