Страница 53, ГДЗ по математике за 1-4 класс к контрольным работам Волковой. Школа России
3 класс. Итоговые контрольные работы за третий класс. Контрольная работа 1. Вариант 1
1) \[\begin{aligned} 7 \cdot 6 &= \textcolor{#e03131}{\mathbf{42}} & \qquad 9 \cdot 4 &= \textcolor{#e03131}{\mathbf{36}} & \qquad 72 : 8 &= \textcolor{#e03131}{\mathbf{9}} \\ 28 : 7 &= \textcolor{#e03131}{\mathbf{4}} & \qquad 13 \cdot 5 &= \textcolor{#e03131}{\mathbf{65}} & \qquad 84 : 7 &= \textcolor{#e03131}{\mathbf{12}} \end{aligned}\] 2) \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}3\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{6}}9 \\ \smash{\raisebox{0.62em}{$+$}} & 124 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{9}\kern-0.075em\mathbf{3}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{7}}18 \\ \smash{\raisebox{0.62em}{$-$}} & 236 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{8}\kern-0.075em\mathbf{2}\kern-0.075em} \end{array}\] \[\begin{aligned} (860 \overset{\textcolor{#1a7f37}{1}}{-} 60) \mathrel{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}{:}}} 10 &= \textcolor{#e03131}{\mathbf{80}} & \qquad 560 \mathrel{\overset{\textcolor{#1a7f37}{1}}{\vphantom{+}{:}}} 7 \overset{\textcolor{#1a7f37}{2}}{+} 20 &= \textcolor{#e03131}{\mathbf{100}} \end{aligned}\]
\[\begin{aligned} 8 \cdot 3 + \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em} &= 25 & \qquad 7 \cdot 7 - \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em} &= 40 \end{aligned}\]
\(1)\ 54 : 6 = \textcolor{#e03131}{\mathbf{9}}\text{ (р.)}\)
\(2)\ 72 : 9 = \textcolor{#e03131}{\mathbf{8}}\text{ (т.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{8}}\) тетрадей.
\[\begin{aligned} 600 - 60 \cdot \textcolor{#e03131}{\pmb{(}}2 + 3\textcolor{#e03131}{\pmb{)}} &= 300 & \qquad 70 + 20 : \textcolor{#e03131}{\pmb{(}}5 - 3\textcolor{#e03131}{\pmb{)}} &= 80 \end{aligned}\]
3 класс. Итоговые контрольные работы за третий класс. Контрольная работа 1. Вариант 2
1) \[\begin{aligned} 8 \cdot 7 &= \textcolor{#e03131}{\mathbf{56}} & \qquad 6 \cdot 9 &= \textcolor{#e03131}{\mathbf{54}} & \qquad 42 : 7 &= \textcolor{#e03131}{\mathbf{6}} \\ 27 : 3 &= \textcolor{#e03131}{\mathbf{9}} & \qquad 14 \cdot 7 &= \textcolor{#e03131}{\mathbf{98}} & \qquad 95 : 5 &= \textcolor{#e03131}{\mathbf{19}} \end{aligned}\] 2) \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}4\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{5}}7 \\ \smash{\raisebox{0.62em}{$+$}} & 234 \\ \hline & \textcolor{#e03131}{\mathbf{6}\kern-0.075em\mathbf{9}\kern-0.075em\mathbf{1}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}6\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{7}}4 \\ \smash{\raisebox{0.62em}{$-$}} & 156 \\ \hline & \textcolor{#e03131}{\mathbf{5}\kern-0.075em\mathbf{1}\kern-0.075em\mathbf{8}\kern-0.075em} \end{array}\] \[\begin{aligned} 540 \mathrel{\overset{\textcolor{#1a7f37}{1}}{\vphantom{+}{:}}} 9 \overset{\textcolor{#1a7f37}{2}}{+} 20 &= \textcolor{#e03131}{\mathbf{80}} & \qquad 10 \mathbin{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}\cdot}} (309 \overset{\textcolor{#1a7f37}{1}}{-} 300) &= \textcolor{#e03131}{\mathbf{90}} \end{aligned}\]
\[\begin{aligned} 7 \cdot 6 + \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em} &= 44 & \qquad 9 \cdot 4 - \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em} &= 30 \end{aligned}\]
\(1)\ 35 : 5 = \textcolor{#e03131}{\mathbf{7}}\text{ (к.)}\)
\(2)\ 7 \cdot 7 = \textcolor{#e03131}{\mathbf{49}}\text{ (к.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{49}}\) кружков.
\[\begin{aligned} 40 + 60 : \textcolor{#e03131}{\pmb{(}}6 - 4\textcolor{#e03131}{\pmb{)}} &= 70 & \qquad 500 - 50 \cdot \textcolor{#e03131}{\pmb{(}}2 + 3\textcolor{#e03131}{\pmb{)}} &= 250 \end{aligned}\]
