\[\boxed{Страница\ 4.}\]
\[\boxed{\mathbf{2.}}\]
\[\textbf{а)}\ A = \left\{ р,\ я,\ д \right\};\ \ B = \left\{ д,\ в,\ о,\ р \right\}\]
\[\textbf{б)}\ в \notin A\]
\[в \in B\]
\[я \in A\]
\[я \notin B\]
\[д \in A\]
\[д \in B\]
\[м \notin A\]
\[м \notin B\]
\[р \in A\]
\[р \in B\]
\[3)\ A \cap B = \left\{ д;р \right\};\]
\[A \cup B = \left\{ р;я;д;в;о \right\}.\]
\[\boxed{\mathbf{3.}}\]
\[K ⊄ M\]
\[M \subset K\]
\[\boxed{\mathbf{4.}}\]
\[2\ 708 < 2\ 709 < 2\ 710\]
\[58\ 061 < 58\ 062 < 58\ 063\]
\[347\ 105 < 347\ 106 < 347\ 107\]
\[\boxed{\mathbf{5.}}\]
\[536 = 500 + 30 + 6\]
\[9025 = 9000 + 20 + 5\]
\[20\ 740 = 20\ 000 + 700 + 40\]
\[306\ 058 =\]
\[= 300\ 000 + 6000 + 50 + 8\]