Страница 14, ГДЗ по математике за 1 класс к тренажёру Погореловой
Сложение вида □ + 3
\[\begin{aligned} 5 + 3 &= \textcolor{#e03131}{\mathbf{8}} & \qquad 3 + 3 + 1 &= \textcolor{#e03131}{\mathbf{7}} \\ 7 + 3 &= \textcolor{#e03131}{\mathbf{10}} & \qquad 6 + 3 + 1 &= \textcolor{#e03131}{\mathbf{10}} \\ 4 + 3 &= \textcolor{#e03131}{\mathbf{7}} & \qquad 2 + 1 + 2 &= \textcolor{#e03131}{\mathbf{5}} \\ 1 + 3 &= \textcolor{#e03131}{\mathbf{4}} & \qquad 5 + 2 + 1 &= \textcolor{#e03131}{\mathbf{8}} \\ 2 + 3 &= \textcolor{#e03131}{\mathbf{5}} & \qquad 4 + 1 + 2 &= \textcolor{#e03131}{\mathbf{7}} \end{aligned}\]
\[\begin{aligned} \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em} + 3 &= 4 & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em} + 3 + 1 &= 5 \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} + 3 &= 8 & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em} + 3 + 1 &= 7 \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em} + 3 &= 6 & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em} + 3 + 2 &= 9 \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em} + 3 &= 10 & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em} + 2 + 1 &= 7 \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em} + 3 &= 9 & \qquad \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em} + 1 + 2 &= 5 \end{aligned}\]