Страница 39, ГДЗ по математике за 2 класс к тренажёру Погореловой
Повторение. Сложение и вычитание
\[\begin{aligned} 40 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 77}}}{+} 37 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 67 & \qquad 26 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 39}}}{+} 13 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 38 \\ 32 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 26}}}{-} 6 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 24 & \qquad 70 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 49}}}{-} 21 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 59 \\ 58 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 67}}}{+} 9 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 67 & \qquad 68 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 80}}}{+} 12 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 90 \\ 70 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 65}}}{-} 5 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 75 & \qquad 39 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 12}}}{-} 27 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 13 \\ 64 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 44}}}{-} 20 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 44 & \qquad 50 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 34}}}{-} 16 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 34 \\ 37 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 45}}}{+} 8 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 55 & \qquad 45 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 69}}}{+} 24 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 68 \\ 85 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 51}}}{-} 34 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 48 & \qquad 86 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 53}}}{-} 33 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 45 \\ 29 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 36}}}{+} 7 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 35 & \qquad 57 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 89}}}{+} 32 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 88 \end{aligned}\]
\[61 \overset{\textcolor{#1a7f37}{2}}{-} (27 \overset{\textcolor{#1a7f37}{1}}{+} 18) \overset{\textcolor{#1a7f37}{3}}{+} 39 = \textcolor{#e03131}{\mathbf{55}}\] \[\begin{array}{l} \text{1)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{2}}7 \\ \smash{\raisebox{0.62em}{$+$}} & 18 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{5}\kern-0.075em} \end{array} \end{array} \qquad \begin{array}{l} \text{2)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{6}}1 \\ \smash{\raisebox{0.62em}{$-$}} & 45 \\ \hline & \textcolor{#e03131}{\mathbf{1}\kern-0.075em\mathbf{6}\kern-0.075em} \end{array} \end{array} \qquad \begin{array}{l} \text{3)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{1}}6 \\ \smash{\raisebox{0.62em}{$+$}} & 39 \\ \hline & \textcolor{#e03131}{\mathbf{5}\kern-0.075em\mathbf{5}\kern-0.075em} \end{array} \end{array}\] \[45 \overset{\textcolor{#1a7f37}{2}}{+} 37 \overset{\textcolor{#1a7f37}{3}}{-} (16 \overset{\textcolor{#1a7f37}{1}}{+} 28) = \textcolor{#e03131}{\mathbf{38}}\] \[\begin{array}{l} \text{1)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{1}}6 \\ \smash{\raisebox{0.62em}{$+$}} & 28 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{4}\kern-0.075em} \end{array} \end{array} \qquad \begin{array}{l} \text{2)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{4}}5 \\ \smash{\raisebox{0.62em}{$+$}} & 37 \\ \hline & \textcolor{#e03131}{\mathbf{8}\kern-0.075em\mathbf{2}\kern-0.075em} \end{array} \end{array} \qquad \begin{array}{l} \text{3)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{8}}2 \\ \smash{\raisebox{0.62em}{$-$}} & 44 \\ \hline & \textcolor{#e03131}{\mathbf{3}\kern-0.075em\mathbf{8}\kern-0.075em} \end{array} \end{array}\] \[(90 \overset{\textcolor{#1a7f37}{1}}{-} 47) \overset{\textcolor{#1a7f37}{3}}{+} (83 \overset{\textcolor{#1a7f37}{2}}{-} 55) = \textcolor{#e03131}{\mathbf{71}}\] \[\begin{array}{l} \text{1)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{9}}0 \\ \smash{\raisebox{0.62em}{$-$}} & 47 \\ \hline & \textcolor{#e03131}{\mathbf{4}\kern-0.075em\mathbf{3}\kern-0.075em} \end{array} \end{array} \qquad \begin{array}{l} \text{2)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{8}}3 \\ \smash{\raisebox{0.62em}{$-$}} & 55 \\ \hline & \textcolor{#e03131}{\mathbf{2}\kern-0.075em\mathbf{8}\kern-0.075em} \end{array} \end{array} \qquad \begin{array}{l} \text{3)} \\ \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{4}}3 \\ \smash{\raisebox{0.62em}{$+$}} & 28 \\ \hline & \textcolor{#e03131}{\mathbf{7}\kern-0.075em\mathbf{1}\kern-0.075em} \end{array} \end{array}\]