Часть 1 страница 47, ГДЗ по математике за 4 класс к рабочей тетради Дорофеева

\(AB = \textcolor{#e03131}{\mathbf{3}}\text{ см},\ BC = \textcolor{#e03131}{\mathbf{8}}\text{ см}\)
\(1)\ 3 \cdot 2 = \textcolor{#e03131}{\mathbf{6}}\text{ (см)}\)
\(2)\ 8 \cdot 2 = \textcolor{#e03131}{\mathbf{16}}\text{ (см)}\)
\(3)\ P = (16 + 6) \cdot 2 = \textcolor{#e03131}{\mathbf{44}}\text{ (см)}\)
\(4)\ S = 16 \cdot 6 = \textcolor{#e03131}{\mathbf{96}}\text{ (см}^2\text{)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{44}}\) см, \(\textcolor{#e03131}{\mathbf{96}}\) см².

\[\begin{aligned} & \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{36}\hspace{1.244em} \xrightarrow{\cdot\,4} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{144}}}\hspace{1.244em} \xrightarrow{-\,44} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{100}}}\hspace{1.244em} \xrightarrow{:\,10} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{10}}}\hspace{1.244em} \xrightarrow{\cdot\,25} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{250}}}\hspace{1.244em} \\[0.6em] & \xrightarrow{:\,2} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{125}}}\hspace{1.244em} \xrightarrow{-\,105} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{20}}}\hspace{1.244em} \xrightarrow{+\,52} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{72}}}\hspace{1.244em} \xrightarrow{:\,2} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{36}\hspace{1.244em} \end{aligned}\] \[\begin{aligned} & \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{36}\hspace{1.244em} \xrightarrow{\cdot\,10} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{360}}}\hspace{1.244em} \xrightarrow{:\,5} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{72}}}\hspace{1.244em} \xrightarrow{:\,9} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{8}}}\hspace{1.244em} \xrightarrow{\cdot\,100} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{800}}}\hspace{1.244em} \\[0.6em] & \xrightarrow{-\,542} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{258}}}\hspace{1.244em} \xrightarrow{:\,3} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{86}}}\hspace{1.244em} \xrightarrow{-\,80} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{6}}}\hspace{1.244em} \xrightarrow{\cdot\,6} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{36}\hspace{1.244em} \end{aligned}\] \[\hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{72}}}\hspace{1.244em} \xrightarrow{\cdot\,7} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{504}}}\hspace{1.244em} \xrightarrow{-\,404} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{100}}}\hspace{1.244em}\] \[\hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{20}}}\hspace{1.244em} \xrightarrow{\cdot\,10} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{200}}}\hspace{1.244em} \xrightarrow{-\,114} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{86}}}\hspace{1.244em}\] \[\begin{array}{r} \vphantom{\boxed{\mathbf{0}}}\hspace{1.45em}\hspace{0.725em}\mathclap{1}\hspace{0.725em}\hspace{0.725em}\mathclap{\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}}\hspace{0.725em}\hspace{1.45em} \\ \vphantom{\boxed{\mathbf{0}}}\rule[-0.55em]{0pt}{0.55em}\hspace{0.725em}\mathclap{\smash{\raisebox{0.72em}{$\times$}}}\hspace{0.725em}\hspace{1.45em}\hspace{0.725em}\mathclap{4}\hspace{0.725em}\hspace{0.725em}\mathclap{0}\hspace{0.725em} \\ \hline \vphantom{\boxed{\mathbf{0}}}\rule{0pt}{1.2em}\hspace{1.45em}\hspace{0.725em}\mathclap{6}\hspace{0.725em}\hspace{0.725em}\mathclap{8}\hspace{0.725em}\hspace{0.725em}\mathclap{\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em}}\hspace{0.725em} \end{array} \qquad \begin{array}{r} \vphantom{\boxed{\mathbf{0}}}\hspace{1.45em}\hspace{0.725em}\mathclap{\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}}\hspace{0.725em}\hspace{0.725em}\mathclap{5}\hspace{0.725em}\hspace{1.45em} \\ \vphantom{\boxed{\mathbf{0}}}\rule[-0.55em]{0pt}{0.55em}\hspace{0.725em}\mathclap{\smash{\raisebox{0.72em}{$\times$}}}\hspace{0.725em}\hspace{1.45em}\hspace{0.725em}\mathclap{\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}}\hspace{0.725em}\hspace{0.725em}\mathclap{0}\hspace{0.725em} \\ \hline \vphantom{\boxed{\mathbf{0}}}\rule{0pt}{1.2em}\hspace{1.45em}\hspace{0.725em}\mathclap{7}\hspace{0.725em}\hspace{0.725em}\mathclap{5}\hspace{0.725em}\hspace{0.725em}\mathclap{0}\hspace{0.725em} \end{array}\] \(\textcolor{#808080}{\text{Подходят и }{25 \cdot 30 = 750}\text{,}}\) \(\textcolor{#808080}{{75 \cdot 10 = 750}\text{.}}\)