Страница 22, ГДЗ по математике за 1-4 класс к контрольным работам Волковой. Школа России
2 класс. Итоговая контрольная работа за II четверть. Вариант 1
\(1)\ 8 - 3 = \textcolor{#e03131}{\mathbf{5}}\text{ (дев.)}\)
\(2)\ 8 + 5 = \textcolor{#e03131}{\mathbf{13}}\text{ (д.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{13}}\) детей.
\[\begin{aligned} 34 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 40}}}{+} 6 &= 49 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em} & \qquad 15 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 8}}}{-} 7 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{15}}\kern0.035em} \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} 7 \end{aligned}\] \(\textcolor{#808080}{\text{Подходит и }{1 + 7}\text{.}}\)
2 класс. Итоговая контрольная работа за II четверть. Вариант 2
\[\begin{aligned} &\begin{aligned} 1) & & 34 + 5 &= \textcolor{#e03131}{\mathbf{39}} & \qquad 49 - 6 &= \textcolor{#e03131}{\mathbf{43}} \\ & & 74 - 20 &= \textcolor{#e03131}{\mathbf{54}} & \qquad 90 - 4 &= \textcolor{#e03131}{\mathbf{86}} \\ & & 28 + 40 &= \textcolor{#e03131}{\mathbf{68}} & \qquad 43 + 9 &= \textcolor{#e03131}{\mathbf{52}} \\ & & 63 + 7 &= \textcolor{#e03131}{\mathbf{70}} & \qquad 37 - 8 &= \textcolor{#e03131}{\mathbf{29}} \end{aligned} \\[10pt] &\begin{aligned} 2) & & 95 - (20 + 70) &= \textcolor{#e03131}{\mathbf{5}} \end{aligned} \end{aligned}\]
\[\begin{aligned} 79 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 77}}}{-} 2 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 80 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 76}}}{-} 4 & \qquad 40 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 100}}}{+} 60 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 10 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 90}}}{+} 80 \end{aligned}\]
\[\begin{aligned} 13 - \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em} &= 6 & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em} + 5 &= 12 & \qquad 17 - \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em} &= 8 \end{aligned}\]
Если \({b = 20}\), то \({37 - b = 37 - 20 = \textcolor{#e03131}{\mathbf{17}}}\).
\(1)\ 6 + 2 = \textcolor{#e03131}{\mathbf{8}}\text{ (шт.)}\)
\(2)\ 6 + 8 = \textcolor{#e03131}{\mathbf{14}}\text{ (шт.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{14}}\) подносов и шкатулок.
\[\begin{aligned} 3 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 70}}}{+} 67 &= 74 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em} & \qquad 14 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 8}}}{-} 6 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{13}}\kern0.035em} \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} 5 \end{aligned}\] \(\textcolor{#808080}{\text{Подходит и }{3 + 5}\text{.}}\)
2 класс. Итоговая контрольная работа за II четверть. Вариант 3
\[\begin{aligned} &\begin{aligned} 1) & & 43 + 7 &= \textcolor{#e03131}{\mathbf{50}} & \qquad 67 - 4 &= \textcolor{#e03131}{\mathbf{63}} \\ & & 84 - 60 &= \textcolor{#e03131}{\mathbf{24}} & \qquad 70 - 2 &= \textcolor{#e03131}{\mathbf{68}} \\ & & 32 + 50 &= \textcolor{#e03131}{\mathbf{82}} & \qquad 35 + 9 &= \textcolor{#e03131}{\mathbf{44}} \\ & & 21 + 8 &= \textcolor{#e03131}{\mathbf{29}} & \qquad 43 - 6 &= \textcolor{#e03131}{\mathbf{37}} \end{aligned} \\[10pt] &\begin{aligned} 2) & & 56 - (13 - 7) &= \textcolor{#e03131}{\mathbf{50}} \end{aligned} \end{aligned}\]
\[\begin{aligned} 54 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 51}}}{-} 3 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 50 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 46}}}{-} 4 & \qquad 30 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 90}}}{+} 60 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 20 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 100}}}{+} 80 \end{aligned}\]
\[\begin{aligned} 11 - \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} &= 6 & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em} + 7 &= 14 & \qquad 16 - \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em} &= 9 \end{aligned}\]
Если \({b = 30}\), то \({83 - b = 83 - 30 = \textcolor{#e03131}{\mathbf{53}}}\).
\(1)\ 15 - 6 = \textcolor{#e03131}{\mathbf{9}}\text{ (с.)}\)
\(2)\ 15 + 9 = \textcolor{#e03131}{\mathbf{24}}\text{ (с.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{24}}\) семени.