Страница 42, ГДЗ по математике за 1-4 класс к контрольным работам Волковой. Школа России
3 класс. Итоговая контрольная работа за I четверть. Вариант 3
\[{\hspace{0.673em}\mathrlap{\textcolor{#e03131}{\raisebox{0.305em}{\rule{12.09em}{0.09em}}}}\mathrlap{\textcolor{#e03131}{\raisebox{0em}{\rule{0.09em}{0.7em}}}}\hspace{12em}\mathrlap{\textcolor{#e03131}{\raisebox{0em}{\rule{0.09em}{0.7em}}}}\hspace{-6em}\mathrlap{\textcolor{#e03131}{\raisebox{0em}{\rule{0.09em}{0.7em}}}}\hspace{-5.955em}\textcolor{#e03131}{\mathclap{\raisebox{0.88em}{\textbf{\textit{A}}}}}\hspace{6em}\textcolor{#e03131}{\mathclap{\raisebox{0.88em}{\textbf{\textit{B}}}}}\hspace{6em}\textcolor{#e03131}{\mathclap{\raisebox{0.88em}{\textbf{\textit{C}}}}}\hspace{0.718em}}\]
\(AB = \textcolor{#e03131}{\mathbf{6}}\text{ см}\)
Отрезков \(\textcolor{#e03131}{\mathbf{3}}\): \(AC\), \(AB\), \(BC\).
\[\begin{aligned} 21 : \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em} \cdot 2 &= 14 & \qquad 3 \cdot 3 \cdot \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em} &= 36 \end{aligned}\]
3 класс. Итоговая контрольная работа за I четверть. Вариант 4
\[\begin{aligned} &\begin{aligned} 1) & & 7 \cdot 3 &= \textcolor{#e03131}{\mathbf{21}} & \qquad 3 \cdot 9 &= \textcolor{#e03131}{\mathbf{27}} & \qquad 7 \cdot 9 &= \textcolor{#e03131}{\mathbf{63}} \\ & & 9 \cdot 4 &= \textcolor{#e03131}{\mathbf{36}} & \qquad 4 \cdot 7 &= \textcolor{#e03131}{\mathbf{28}} & \qquad 7 \cdot 6 &= \textcolor{#e03131}{\mathbf{42}} \\ & & 49 : 7 &= \textcolor{#e03131}{\mathbf{7}} & \qquad 27 : 3 &= \textcolor{#e03131}{\mathbf{9}} & \qquad 16 : 2 &= \textcolor{#e03131}{\mathbf{8}} \\ & & 36 : 6 &= \textcolor{#e03131}{\mathbf{6}} & \qquad 24 : 8 &= \textcolor{#e03131}{\mathbf{3}} & \qquad 18 : 6 &= \textcolor{#e03131}{\mathbf{3}} \end{aligned} \\[10pt] &\begin{aligned} 2) & & 91 - 45 &= \textcolor{#e03131}{\mathbf{46}} & \qquad 43 + 37 &= \textcolor{#e03131}{\mathbf{80}} & \qquad 53 \overset{\textcolor{#1a7f37}{2}}{-} (11 \overset{\textcolor{#1a7f37}{1}}{-} 8) &= \textcolor{#e03131}{\mathbf{50}} \end{aligned} \end{aligned}\]
\[\begin{aligned} 19 + x &= 99 & \qquad 64 - x &= 50 \\ x &= 99 - 19 & \qquad x &= 64 - 50 \\ x &= \textcolor{#e03131}{\mathbf{80}} & \qquad x &= \textcolor{#e03131}{\mathbf{14}} \end{aligned}\]
\(1)\ 23 + 27 = \textcolor{#e03131}{\mathbf{50}}\text{ (стр.)}\)
\(2)\ 80 - 50 = \textcolor{#e03131}{\mathbf{30}}\text{ (стр.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{30}}\) страниц.
\(8 \cdot 2 = \textcolor{#e03131}{\mathbf{16}}\text{ (л.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{16}}\) лет.
\[{\hspace{0.673em}\mathrlap{\textcolor{#e03131}{\raisebox{0.305em}{\rule{6.09em}{0.09em}}}}\mathrlap{\textcolor{#e03131}{\raisebox{0em}{\rule{0.09em}{0.7em}}}}\hspace{6em}\mathrlap{\textcolor{#e03131}{\raisebox{0em}{\rule{0.09em}{0.7em}}}}\hspace{-3em}\mathrlap{\textcolor{#e03131}{\raisebox{0em}{\rule{0.09em}{0.7em}}}}\hspace{-2.955em}\textcolor{#e03131}{\mathclap{\raisebox{0.88em}{\textbf{\textit{M}}}}}\hspace{3em}\textcolor{#e03131}{\mathclap{\raisebox{0.88em}{\textbf{\textit{K}}}}}\hspace{3em}\textcolor{#e03131}{\mathclap{\raisebox{0.88em}{\textbf{\textit{T}}}}}\hspace{0.718em}}\]
\(MK = \textcolor{#e03131}{\mathbf{3}}\text{ см}\)
Отрезков \(\textcolor{#e03131}{\mathbf{3}}\): \(MT\), \(MK\), \(KT\).
\[\begin{aligned} 27 : 3 \cdot \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em} &= 36 & \qquad 12 : 6 \cdot \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em} &= 16 \end{aligned}\]