\[Страница\ 55.\]
\[\boxed{\mathbf{162.}}\]
\[\textbf{а)}\ 1\ см.\]
\[\textbf{б)}\ 1\ дм^{2} = 100\ см^{2}.\]
\[\textbf{в)}\ 1\ м^{2} = 10\ 000\ см^{2}.\]
\[\textbf{г)}\ 1\ а = 100\ м^{2}.\]
\[\textbf{д)}\ 1\ га = 100\ а\]
\[\textbf{е)}\ 1\ км^{2} = 1\ 000\ 000\ м^{2}.\]
\[\boxed{\mathbf{163.}}\]
\[\textbf{а)}\ см\]
\[\textbf{б)}\ см\]
\[\textbf{в)}\ м\]
\[\textbf{г)}\ м^{2}\]
\[\textbf{д)}\ га\]
\[\textbf{е)}\ м\]
\[\textbf{ж)}\ км^{2}\]
\[\textbf{з)}\ а\]
\[\textbf{и)}\ см\]
\[к)\ мм\]
\[\boxed{\mathbf{164.}}\]
\[\textbf{а)}\ 7\ дм^{2} = 700\ см^{2}\]
\[7\ м^{2} = 70\ 000\ см^{2}\]
\[3\ м^{2}\ 17\ дм^{2} = 31\ 700\ см^{2}\]
\[15\ см^{2}\ 3\ мм^{2} = 1503\ мм^{2}\]
\[\textbf{б)}\ 4\ а = 400\ м^{2}\]
\[12\ га = 120\ 000\ м^{2}\]
\[10\ га\ 3\ а = 103\ а\]
\[5\ га\ 17\ а = 517\ а = 51\ 700\ м^{2}\]
\[\textbf{в)}\ 21\ га = 2100\ а\]
\[2\ га\ 9\ а = 209\ а\]
\[82\ 000\ м^{2} = 820\ а\]
\[5\ км^{2}\ 600\ м^{2} = 5\ 000\ 600\ м^{2} =\]
\[= 50\ 006\ а\]
\[\textbf{г)}\ 340\ 000\ м^{2} = 34\ га\]
\[34\ 000\ а = 340\ га\]
\[3\ км^{2} = 300\ га\]
\[7\ км^{2} = 7\ 000\ 000\ м^{2}\]
\[\boxed{\mathbf{165.}}\]
\[\textbf{а)}\ 21\ см^{2} < 1\ дм^{2}\]
\[\textbf{б)}\ 60\ мм^{2} < 6\ см^{2}\]
\[\textbf{в)}\ 400\ дм^{2} = 4\ м^{2}\ \]
\[\textbf{г)}\ 1\ м^{2} > 201\ см^{2}\]
\[\textbf{д)}\ 21\ см^{2} < 1\ дм^{2}\]
\[\textbf{е)}\ 21\ 000\ м^{2} = 210\ а\]