Страница 30, ГДЗ по математике за 4 класс к самостоятельным и контрольным работам Лопатковой
Величины. Самостоятельная работа № 10. Вариант 1
\[\begin{aligned} \overset{\textcolor{#808080}{\scriptstyle 6\,020\text{ кг}}}{6\text{ т }20\text{ кг}} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} \overset{\textcolor{#808080}{\scriptstyle 6\,200\text{ кг}}}{6\text{ т }2\text{ ц}} & \qquad \overset{\textcolor{#808080}{\scriptstyle 50\,000\text{ см}^2}}{5\text{ м}^2} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 500\text{ см}^2 \\ \overset{\textcolor{#808080}{\scriptstyle 20\,300\text{ м}}}{20\text{ км }300\text{ м}} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 23\,000\text{ м} & \qquad 300\text{ см}^2 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} \overset{\textcolor{#808080}{\scriptstyle 300\text{ см}^2}}{3\text{ дм}^2} \\ \overset{\textcolor{#808080}{\scriptstyle 82\text{ ч}}}{3\text{ сут. }10\text{ ч}} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 190\text{ ч} & \qquad \overset{\textcolor{#808080}{\scriptstyle 20\,000\text{ м}^2}}{2\text{ га}} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 200\text{ м}^2 \end{aligned}\]
\(1)\ 40 \cdot 9 = \textcolor{#e03131}{\mathbf{360}}\text{ (м}^2\text{)}\)
\(2)\ 360 - 240 = \textcolor{#e03131}{\mathbf{120}}\text{ (м}^2\text{)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{120}}\) м².

\(S = 6 \cdot 1 + 2 \cdot 2 = \textcolor{#e03131}{\mathbf{10}}\text{ (см}^2\text{)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{10}}\) см².
\[\overset{\textcolor{#808080}{\scriptstyle 500\text{ а}}}{5\text{ га}} - 75\text{ а} = \textcolor{#e03131}{\mathbf{4}}\text{ га }\textcolor{#e03131}{\mathbf{25}}\text{ а}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{5}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{0}}0 \\ \smash{\raisebox{0.62em}{$-$}} & 75 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{2}\kern-0.075em\mathbf{5}\kern-0.075em} \end{array}\]