Страница 6, ГДЗ по математике за 4 класс к самостоятельным и контрольным работам Лопатковой

\[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{1}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{9}}8 \\ \smash{\raisebox{0.62em}{$+$}} & 757 \\ \hline & \textcolor{#e03131}{\mathbf{9}\kern-0.075em\mathbf{5}\kern-0.075em\mathbf{5}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}289 \\ \smash{\raisebox{0.62em}{$\times$}} & 3 \\ \hline & \textcolor{#e03131}{\mathbf{8}\kern-0.075em\mathbf{6}\kern-0.075em\mathbf{7}\kern-0.075em} \end{array}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{7}}48 \\ \smash{\raisebox{0.62em}{$-$}} & \vphantom{\overset{\bullet}{0}}267 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{8}\kern-0.075em\mathbf{1}\kern-0.075em} \\ & \vphantom{\underline{0}} \\ & \vphantom{\underline{0}} \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{28}8 & \underline{\,4\phantom{0}\,} \\ \underline{28}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{7}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{2}\kern-0.075em}} \\ \phantom{00}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}8 & \\ \phantom{00}\underline{8} & \\ \phantom{00}0 & \end{array}\]

\[\begin{aligned} & 1\,000 \overset{\textcolor{#1a7f37}{3}}{-} 112 \mathbin{\overset{\textcolor{#1a7f37}{1}}{\vphantom{+}\cdot}} 4 \overset{\textcolor{#1a7f37}{4}}{+} 669 \mathrel{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}{:}}} 3 \\ & 824 \mathrel{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}{:}}} (9 \overset{\textcolor{#1a7f37}{1}}{-} 5) \overset{\textcolor{#1a7f37}{4}}{+} 121 \mathbin{\overset{\textcolor{#1a7f37}{3}}{\vphantom{+}\cdot}} 4 \\ & a \overset{\textcolor{#1a7f37}{3}}{-} c \mathbin{\overset{\textcolor{#1a7f37}{1}}{\vphantom{+}\cdot}} b \overset{\textcolor{#1a7f37}{4}}{+} d \mathrel{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}{:}}} m \\ & a \mathrel{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}{:}}} (x \overset{\textcolor{#1a7f37}{1}}{+} y) \overset{\textcolor{#1a7f37}{4}}{+} b \mathbin{\overset{\textcolor{#1a7f37}{3}}{\vphantom{+}\cdot}} d \\ & b \overset{\textcolor{#1a7f37}{3}}{+} (c \overset{\textcolor{#1a7f37}{1}}{-} d) \mathrel{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}{:}}} n \\ & (p \overset{\textcolor{#1a7f37}{1}}{-} m) \overset{\textcolor{#1a7f37}{3}}{+} n \mathbin{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}\cdot}} a \end{aligned}\]

\(36 + 36 : 2 = \textcolor{#e03131}{\mathbf{54}}\text{ (п.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{54}}\) птицы.

\[\begin{aligned} \overset{\textcolor{#808080}{\scriptstyle 33}}{3 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{}\hspace{0.72em}} 3} \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} 3 &= 30 \\ 3 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{\cdot}}}}\hspace{0.72em}} 3 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{\cdot}}}}\hspace{0.72em}} 3 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{+}}}}\hspace{0.72em}} 3 &= 30 \\ \overset{\textcolor{#808080}{\scriptstyle 33}}{3 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{}\hspace{0.72em}} 3} \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} 3 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{+}}}}\hspace{0.72em}} 3 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} 3 &= 30 \end{aligned}\] \(\textcolor{#808080}{\text{Подходят и}}\) \(\textcolor{#808080}{{3 + 3 \cdot 3 \cdot 3 = 30}\text{,}}\) \(\textcolor{#808080}{{33 + 3 - 3 - 3 = 30}\text{,}}\) \(\textcolor{#808080}{{33 - 3 \cdot 3 : 3 = 30}\text{.}}\)