10 мн на розвязок даю 45 б. Created by kunpandanil.

[tex]\displaystyle -\frac{1}{2}:10+8\frac{7}{10}:5+(-4\frac{1}5})(-0,4)=-\frac{1}{2}*\frac{1}{10}+\frac{87}{10}*\frac{1}{5}+(-\frac{21}{5})(-\frac{2}{5})=\\\\-\frac{1}{20}+\frac{87}{50}+\frac{42}{25}=\frac{337}{100}=3\frac{37}{100}=3,37[/tex]