Страница 26, ГДЗ по математике за 1-4 класс к контрольным работам Волковой. Школа России
2 класс. Контрольная работа по теме «Числа от 1 до 100. Умножение и деление». Вариант 1
\[\begin{aligned} 13 \cdot 3 &= 13 + 13 + 13 = \textcolor{#e03131}{\mathbf{39}} \\ 6 \cdot 4 &= 6 + 6 + 6 + 6 = \textcolor{#e03131}{\mathbf{24}} \end{aligned}\]
\[\begin{aligned} 7 \cdot 3 + 7 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 7 \cdot 5 & \qquad 3 \cdot 5 - 5 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 3 \cdot 4 \end{aligned}\]
\[\begin{aligned} 8 \cdot \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em} &= 4 \cdot \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em} & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} \cdot 12 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{12}}\kern0.035em} \cdot 5 \end{aligned}\] \(\textcolor{#808080}{\text{Подходят и другие}}\) \(\textcolor{#808080}{\text{числа, например }{8 \cdot 1 = 4 \cdot 2}}\) \(\textcolor{#808080}{\text{и }{0 \cdot 12 = 0 \cdot 5}\text{.}}\)
\[\begin{aligned} 5 \cdot 7 &= 35 & \qquad 14 \cdot 3 &= 42 \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{35}}\kern0.035em} : 5 &= 7 & \qquad 42 : \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{14}}\kern0.035em} &= 3 \\ 35 : \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em} &= 5 & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{42}}\kern0.035em} : 3 &= 14 \end{aligned}\]
\[\begin{aligned} 2 \cdot 6 &= \textcolor{#e03131}{\mathbf{12}} & \qquad 1 \cdot 7 &= \textcolor{#e03131}{\mathbf{7}} & \qquad 14 : 2 &= \textcolor{#e03131}{\mathbf{7}} \\ 3 \cdot 5 &= \textcolor{#e03131}{\mathbf{15}} & \qquad 2 \cdot 9 &= \textcolor{#e03131}{\mathbf{18}} & \qquad 24 : 3 &= \textcolor{#e03131}{\mathbf{8}} \\ 16 : 8 &= \textcolor{#e03131}{\mathbf{2}} & \qquad 10 \cdot 3 &= \textcolor{#e03131}{\mathbf{30}} \\ 12 : 3 &= \textcolor{#e03131}{\mathbf{4}} & \qquad 0 \cdot 13 &= \textcolor{#e03131}{\mathbf{0}} \end{aligned}\]
\(4 \cdot 3 = \textcolor{#e03131}{\mathbf{12}}\text{ (чел.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{12}}\) человек.
\(16 : 8 = \textcolor{#e03131}{\mathbf{2}}\text{ (к.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{2}}\) коробки.
\[\begin{aligned} 16 : \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em} &= 17 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 8}}}{-} 9 \end{aligned}\]
2 класс. Контрольная работа по теме «Числа от 1 до 100. Умножение и деление». Вариант 2
\[\begin{aligned} 14 \cdot 2 &= 14 + 14 = \textcolor{#e03131}{\mathbf{28}} \\ 8 \cdot 3 &= 8 + 8 + 8 = \textcolor{#e03131}{\mathbf{24}} \end{aligned}\]