Страница 31, ГДЗ по математике за 4 класс к самостоятельным и контрольным работам Лопатковой
Величины. Самостоятельная работа № 10. Вариант 2
\[\begin{aligned} \overset{\textcolor{#808080}{\scriptstyle 6\,200\text{ кг}}}{6\text{ т }200\text{ кг}} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 62\,000\text{ кг} & \qquad \overset{\textcolor{#808080}{\scriptstyle 2\,000\text{ см}^2}}{20\text{ дм}^2} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 2\,000\text{ см}^2 \\ \overset{\textcolor{#808080}{\scriptstyle 50\,040\text{ дм}}}{5\text{ км }4\text{ м}} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} \overset{\textcolor{#808080}{\scriptstyle 50\,040\text{ дм}}}{5\text{ км }40\text{ дм}} & \qquad \overset{\textcolor{#808080}{\scriptstyle 30\,000\text{ м}^2}}{3\text{ га}} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 30\,000\text{ м}^2 \\ 245\text{ ч} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} \overset{\textcolor{#808080}{\scriptstyle 101\text{ ч}}}{4\text{ сут. }5\text{ ч}} & \qquad \overset{\textcolor{#808080}{\scriptstyle 400\text{ дм}^2}}{4\text{ м}^2} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 500\text{ дм}^2 \end{aligned}\]
\(1)\ 80 \cdot 6 = \textcolor{#e03131}{\mathbf{480}}\text{ (м}^2\text{)}\)
\(2)\ 480 - 300 = \textcolor{#e03131}{\mathbf{180}}\text{ (м}^2\text{)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{180}}\) м².

\(S = 5 \cdot 1 + 3 \cdot 3 = \textcolor{#e03131}{\mathbf{14}}\text{ (см}^2\text{)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{14}}\) см².
\[\overset{\textcolor{#808080}{\scriptstyle 700\text{ а}}}{7\text{ га}} - 34\text{ а} = \textcolor{#e03131}{\mathbf{6}}\text{ га }\textcolor{#e03131}{\mathbf{66}}\text{ а}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{7}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{0}}0 \\ \smash{\raisebox{0.62em}{$-$}} & 34 \\ \hline & \textcolor{#e03131}{\mathbf{6}\kern-0.075em\mathbf{6}\kern-0.075em\mathbf{6}\kern-0.075em} \end{array}\]