Ответ:
\(\frac{7}{6}\cdot 3,1-3,6^2=\frac{7}{6}\cdot\frac{31}{10}-\frac{324}{25}=\frac{217}{60}-\frac{324}{25}=\frac{1085-3888}{300}=-\frac{2803}{300}=-9\frac{103}{300}.\)
\(0,2^3:\frac{3}{20}-1,3=0,008:\frac{3}{20}-1,3=0,008\cdot\frac{20}{3}-1,3=\frac{1}{150}-\frac{13}{10}=-\frac{187}{150}=-1\frac{37}{150}.\)
\(2,856:1\frac{2}{5}\cdot(-3)=2,856:\frac{7}{5}\cdot(-3)=2,856\cdot\frac{5}{7}\cdot(-3)=2,04\cdot(-3)=-6,12.\)
\(\frac{1}{10}:0,5-0,4=0,1:0,5-0,4=0,2-0,4=-0,2.\)
Ответ: 1) \(-9\frac{103}{300}\); 2) \(-1\frac{37}{150}\); 3) \(-6,12\); 4) \(-0,2\).
