\[\boxed{\text{176.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1\ км^{2} = 1\ 000\ 000\ м^{2}.\]
\[1\ м^{2} = 100\ дм^{2}\]
\[1\ м^{2} = 10\ 000\ см^{2}\]
\[1\ дм^{2} = 100\ см^{2}\]
\[1\ см^{2} = 100\ мм^{2}\]
Решение.
\[1)\ 5\ {км}^{2} = 5\ 000\ 000\ м^{2}\]
\[500\ {дм}^{2} = 5\ м^{2}\]
\[2)\ 8\ {см}^{2} = 800\ {мм}^{2}\]
\[3\ {см}^{2}\ 20\ {мм}^{2} = 320\ {мм}^{2}\]
\[3)\ 2\ {дм}^{2} = 200\ {см}^{2}\]
\[3\ м^{2} = 30\ 000\ {см}^{2}\]
\[4)\ 7\ м^{2} = 700\ {дм}^{2}\]
\[900\ {см}^{2} = 9\ {дм}^{2}\]