\[\boxed{\mathbf{1.}}\]
\[1)\ S = 10\ дм^{2}\]
\[2)\ S = 10\ дм^{2}\]
\[3)\ S = 16\ дм^{2}\]
\[\boxed{\mathbf{2.}}\]
\[1)\ S = 5 \cdot 14 = 70\ см^{2}.\]
\[2)\ 40\ мм = 4\ см.\ \]
\[S = 15 \cdot 4 = 60\ см^{2}.\]
\[3)\ 13\ м = 130\ дм.\]
\[S = 130 \cdot 7 = 910\ дм^{2}\text{.\ }\]
\[4)\ 5\ м\ 9\ см = 509\ см.\]
\[S = 68 \cdot 509 = 34\ 612\ см^{2}.\]