Страница 45, ГДЗ по математике за 2 класс к проверочным работам Волковой. Серия "Школа России" к УМК Моро
Сложение и вычитание. Письменные вычисления. Проверочная работа 2. Вариант 2
\[\begin{aligned} 1) & & \textcolor{#e03131}{\mathbf{3}} + \textcolor{#e03131}{\mathbf{9}} &= 12 & \qquad 2) & & \textcolor{#e03131}{\mathbf{4}} + \textcolor{#e03131}{\mathbf{9}} &= 13 \\ & & \textcolor{#e03131}{\mathbf{4}} + \textcolor{#e03131}{\mathbf{8}} &= 12 & \qquad & & \textcolor{#e03131}{\mathbf{5}} + \textcolor{#e03131}{\mathbf{8}} &= 13 \\ & & \textcolor{#e03131}{\mathbf{5}} + \textcolor{#e03131}{\mathbf{7}} &= 12 & \qquad & & \textcolor{#e03131}{\mathbf{6}} + \textcolor{#e03131}{\mathbf{7}} &= 13 \\ & & \textcolor{#e03131}{\mathbf{6}} + \textcolor{#e03131}{\mathbf{6}} &= 12 & \qquad & & & \end{aligned}\]
\[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}70 \\ \smash{\raisebox{0.62em}{$+$}} & 19 \\ \hline & \textcolor{#e03131}{\mathbf{8}\kern-0.075em\mathbf{9}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}47 \\ \smash{\raisebox{0.62em}{$+$}} & 21 \\ \hline & \textcolor{#e03131}{\mathbf{6}\kern-0.075em\mathbf{8}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}81 \\ \smash{\raisebox{0.62em}{$+$}} & 18 \\ \hline & \textcolor{#e03131}{\mathbf{9}\kern-0.075em\mathbf{9}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}63 \\ \smash{\raisebox{0.62em}{$+$}} & 25 \\ \hline & \textcolor{#e03131}{\mathbf{8}\kern-0.075em\mathbf{8}\kern-0.075em} \end{array}\]
\[\hspace{0.72em}\mathclap{\raisebox{0.06em}{$\textcolor{#e03131}{\Large\bigcirc}$}}\mathclap{1}\hspace{0.72em} \qquad \hspace{0.72em}\mathclap{\raisebox{0.06em}{$\textcolor{#2f9e44}{\Large\bigcirc}$}}\mathclap{2}\hspace{0.72em} \qquad \hspace{0.72em}\mathclap{\raisebox{0.06em}{$\textcolor{#1c7ed6}{\Large\bigcirc}$}}\mathclap{3}\hspace{0.72em} \qquad \hspace{0.72em}\mathclap{\raisebox{0.06em}{$\textcolor{#e03131}{\Large\bigcirc}$}}\mathclap{4}\hspace{0.72em}\]
\[\begin{aligned} 39 + 16 &= \textcolor{#e03131}{\mathbf{55}} & \qquad 47 + 25 &= 72 \\ 37 + 16 &= 53 & \qquad 48 + 26 &= \textcolor{#e03131}{\mathbf{74}} \\ 35 + 16 &= \textcolor{#e03131}{\mathbf{51}} & \qquad 49 + 27 &= \textcolor{#e03131}{\mathbf{76}} \end{aligned}\]