Страница 47, ГДЗ по математике за 4 класс к тренажёру Конновой

\[40\text{ мин} \overset{\kern0.25em\textcolor{#808080}{\scriptstyle 120\text{ мин}}\kern0.25em}{+} \overset{\textcolor{#808080}{\scriptstyle 80\text{ мин}}}{1\text{ ч }20\text{ мин}} = \boxed{\smash[b]{\underset{\hspace{7em}}{\textcolor{#e03131}{\mathbf{2}}\text{ ч}}}}\] \[\overset{\textcolor{#808080}{\scriptstyle 35\text{ мм}}}{3\text{ см }5\text{ мм}} \overset{\kern0.25em\textcolor{#808080}{\scriptstyle 27\text{ мм}}\kern0.25em}{-} 8\text{ мм} = \boxed{\smash[b]{\underset{\hspace{7em}}{\textcolor{#e03131}{\mathbf{2}}\text{ см }\textcolor{#e03131}{\mathbf{7}}\text{ мм}}}}\] \[\overset{\textcolor{#808080}{\scriptstyle 2\,345\text{ дм}^2}}{23\text{ м}^2\text{ }45\text{ дм}^2} + 70\text{ дм}^2 = \boxed{\smash[b]{\underset{\hspace{7em}}{\textcolor{#e03131}{\mathbf{24}}\text{ м}^2\text{ }\textcolor{#e03131}{\mathbf{15}}\text{ дм}^2}}}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}2\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{3}}45 \\ \smash{\raisebox{0.62em}{$+$}} & 70 \\ \hline & \textcolor{#e03131}{\mathbf{2}\kern-0.075em\mathbf{4}\kern-0.075em\mathbf{1}\kern-0.075em\mathbf{5}\kern-0.075em} \end{array}\] \[\overset{\textcolor{#808080}{\scriptstyle 550\text{ см}^2}}{5\text{ дм}^2\text{ }50\text{ см}^2} \overset{\kern0.25em\textcolor{#808080}{\scriptstyle 470\text{ см}^2}\kern0.25em\rule[-0.35em]{0pt}{0.35em}}{-} 80\text{ см}^2 = \boxed{\smash[b]{\underset{\hspace{7em}}{\textcolor{#e03131}{\mathbf{4}}\text{ дм}^2\text{ }\textcolor{#e03131}{\mathbf{70}}\text{ см}^2}}}\] \[\overset{\textcolor{#808080}{\scriptstyle 2\,180\text{ г}}}{2\text{ кг }180\text{ г}} + 900\text{ г} = \boxed{\smash[b]{\underset{\hspace{7em}}{\textcolor{#e03131}{\mathbf{3}}\text{ кг }\textcolor{#e03131}{\mathbf{80}}\text{ г}}}}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{2}}180 \\ \smash{\raisebox{0.62em}{$+$}} & 900 \\ \hline & \textcolor{#e03131}{\mathbf{3}\kern-0.075em\mathbf{0}\kern-0.075em\mathbf{8}\kern-0.075em\mathbf{0}\kern-0.075em} \end{array}\] \[\overset{\textcolor{#808080}{\scriptstyle 753\text{ мм}^2}}{7\text{ см}^2\text{ }53\text{ мм}^2} \cdot 2 = \boxed{\smash[b]{\underset{\hspace{7em}}{\textcolor{#e03131}{\mathbf{15}}\text{ см}^2\text{ }\textcolor{#e03131}{\mathbf{6}}\text{ мм}^2}}}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}753 \\ \smash{\raisebox{0.62em}{$\times$}} & 2 \\ \hline & \textcolor{#e03131}{\mathbf{1}\kern-0.075em\mathbf{5}\kern-0.075em\mathbf{0}\kern-0.075em\mathbf{6}\kern-0.075em} \end{array}\] \[\overset{\textcolor{#808080}{\scriptstyle 154\text{ мм}}}{15\text{ см }4\text{ мм}} : 2 = \boxed{\smash[b]{\underset{\hspace{7em}}{\textcolor{#e03131}{\mathbf{7}}\text{ см }\textcolor{#e03131}{\mathbf{7}}\text{ мм}}}}\] \[\begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{15}4 & \underline{\,2\phantom{0}\,} \\ \underline{14}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{7}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{7}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}14 & \\ \phantom{0}\underline{14} & \\ \phantom{00}0 & \end{array}\]