Страница 8, ГДЗ по математике за 4 класс к самостоятельным и контрольным работам Лопатковой

\[\begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{46}9 & \underline{\,7\phantom{0}\,} \\ \underline{42}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{6}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{7}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}49 & \\ \phantom{0}\underline{49} & \\ \phantom{00}0 & \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{60}3 & \underline{\,9\phantom{0}\,} \\ \underline{54}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{6}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{7}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}63 & \\ \phantom{0}\underline{63} & \\ \phantom{00}0 & \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{29}4 & \underline{\,6\phantom{0}\,} \\ \underline{24}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{4}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{9}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}54 & \\ \phantom{0}\underline{54} & \\ \phantom{00}0 & \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{24}0 & \underline{\,5\phantom{0}\,} \\ \underline{20}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{4}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{8}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}40 & \\ \phantom{0}\underline{40} & \\ \phantom{00}0 & \end{array}\] Проверка: \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}67 \\ \smash{\raisebox{0.62em}{$\times$}} & 7 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{6}\kern-0.075em\mathbf{9}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}67 \\ \smash{\raisebox{0.62em}{$\times$}} & 9 \\ \hline & \textcolor{#e03131}{\mathbf{6}\kern-0.075em\mathbf{0}\kern-0.075em\mathbf{3}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}49 \\ \smash{\raisebox{0.62em}{$\times$}} & 6 \\ \hline & \textcolor{#e03131}{\mathbf{2}\kern-0.075em\mathbf{9}\kern-0.075em\mathbf{4}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}48 \\ \smash{\raisebox{0.62em}{$\times$}} & 5 \\ \hline & \textcolor{#e03131}{\mathbf{2}\kern-0.075em\mathbf{4}\kern-0.075em\mathbf{0}\kern-0.075em} \end{array}\]

\[\begin{aligned} 130 + c &= 620 & \qquad 5 \cdot a &= 505 \\ c &= 620 - 130 & \qquad a &= 505 : 5 \\ c &= \textcolor{#e03131}{\mathbf{490}} & \qquad a &= \textcolor{#e03131}{\mathbf{101}} \end{aligned}\] \[\begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{5}05 & \underline{\,5\phantom{00}\,} \\ \underline{5}\phantom{00} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{1}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{0}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{1}\kern-0.075em}} \\ \phantom{00}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}5 & \\ \phantom{00}\underline{5} & \\ \phantom{00}0 & \end{array}\]

\(1)\ 54 : 6 = \textcolor{#e03131}{\mathbf{9}}\text{ (кг)}\)
\(2)\ 9 \cdot 8 = \textcolor{#e03131}{\mathbf{72}}\text{ (кг)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{72}}\) кг.

Ответ: в \(\textcolor{#e03131}{\mathbf{4}}\) раза меньше.
\(\textcolor{#808080}{\text{Например, }{10 \cdot 2 = 20}\text{, }{10 : 2 = 5}\text{,}}\) \(\textcolor{#808080}{{20 : 5 = 4}\text{.}}\)