Страница 9, ГДЗ по математике за 4 класс к самостоятельным и контрольным работам Лопатковой

\[\begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{17}1 & \underline{\,3\phantom{0}\,} \\ \underline{15}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{5}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{7}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}21 & \\ \phantom{0}\underline{21} & \\ \phantom{00}0 & \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{50}4 & \underline{\,9\phantom{0}\,} \\ \underline{45}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{5}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{6}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}54 & \\ \phantom{0}\underline{54} & \\ \phantom{00}0 & \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{46}4 & \underline{\,8\phantom{0}\,} \\ \underline{40}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{5}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{8}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}64 & \\ \phantom{0}\underline{64} & \\ \phantom{00}0 & \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{26}6 & \underline{\,7\phantom{0}\,} \\ \underline{21}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{3}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{8}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}56 & \\ \phantom{0}\underline{56} & \\ \phantom{00}0 & \end{array}\] Проверка: \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}57 \\ \smash{\raisebox{0.62em}{$\times$}} & 3 \\ \hline & \textcolor{#e03131}{\mathbf{1}\kern-0.075em\mathbf{7}\kern-0.075em\mathbf{1}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}56 \\ \smash{\raisebox{0.62em}{$\times$}} & 9 \\ \hline & \textcolor{#e03131}{\mathbf{5}\kern-0.075em\mathbf{0}\kern-0.075em\mathbf{4}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}58 \\ \smash{\raisebox{0.62em}{$\times$}} & 8 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{6}\kern-0.075em\mathbf{4}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}38 \\ \smash{\raisebox{0.62em}{$\times$}} & 7 \\ \hline & \textcolor{#e03131}{\mathbf{2}\kern-0.075em\mathbf{6}\kern-0.075em\mathbf{6}\kern-0.075em} \end{array}\]

\[\begin{aligned} b + 308 &= 998 & \qquad 2 \cdot b &= 812 \\ b &= 998 - 308 & \qquad b &= 812 : 2 \\ b &= \textcolor{#e03131}{\mathbf{690}} & \qquad b &= \textcolor{#e03131}{\mathbf{406}} \end{aligned}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}998 \\ \smash{\raisebox{0.62em}{$-$}} & \vphantom{\overset{\bullet}{0}}308 \\ \hline & \textcolor{#e03131}{\mathbf{6}\kern-0.075em\mathbf{9}\kern-0.075em\mathbf{0}\kern-0.075em} \\ & \vphantom{\underline{0}} \\ & \vphantom{\underline{0}} \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{8}12 & \underline{\,2\phantom{00}\,} \\ \underline{8}\phantom{00} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{4}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{0}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{6}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}12 & \\ \phantom{0}\underline{12} & \\ \phantom{00}0 & \end{array}\]

\(1)\ 36 : 3 = \textcolor{#e03131}{\mathbf{12}}\text{ (в.)}\)
\(2)\ 12 \cdot 5 = \textcolor{#e03131}{\mathbf{60}}\text{ (в.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{60}}\) вёдер.

Ответ: в \(\textcolor{#e03131}{\mathbf{9}}\) раз больше.
\(\textcolor{#808080}{\text{Например, }{6 : 3 = 2}\text{, }{6 \cdot 3 = 18}\text{,}}\) \(\textcolor{#808080}{{18 : 2 = 9}\text{.}}\)