\[\boxed{\text{865.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[a < b\]
\[\textbf{а)}\ a + 4 < b + 4\]
\[\textbf{б)}\ a - 5 < b - 5\]
\[\textbf{в)}\ a \cdot 8 < b \cdot 8\]
\[\textbf{г)}\ a\ :\frac{1}{3} < b\ :\frac{1}{3}\]
\[\textbf{д)} - 4,8a > - 4,8b\]
\[\textbf{е)} - a > - b\]