Страница 11, ГДЗ по математике за 1 класс к тренажёру Погореловой
Вычисления вида □ + 1, □ − 1, □ + 2, □ − 2
\[\begin{aligned} 2 + 2 &= \textcolor{#e03131}{\mathbf{4}} & \qquad 4 + 1 &= \textcolor{#e03131}{\mathbf{5}} & \qquad 6 - 1 &= \textcolor{#e03131}{\mathbf{5}} \\ 9 - 2 &= \textcolor{#e03131}{\mathbf{7}} & \qquad 7 - 2 &= \textcolor{#e03131}{\mathbf{5}} & \qquad 7 + 1 &= \textcolor{#e03131}{\mathbf{8}} \\ 6 + 2 &= \textcolor{#e03131}{\mathbf{8}} & \qquad 1 + 2 &= \textcolor{#e03131}{\mathbf{3}} & \qquad 4 - 2 &= \textcolor{#e03131}{\mathbf{2}} \\ 4 - 1 &= \textcolor{#e03131}{\mathbf{3}} & \qquad 8 - 1 &= \textcolor{#e03131}{\mathbf{7}} & \qquad 3 - 1 &= \textcolor{#e03131}{\mathbf{2}} \\ 5 - 2 &= \textcolor{#e03131}{\mathbf{3}} & \qquad 5 + 2 &= \textcolor{#e03131}{\mathbf{7}} & \qquad 9 + 1 &= \textcolor{#e03131}{\mathbf{10}} \\ 8 + 1 &= \textcolor{#e03131}{\mathbf{9}} & \qquad 6 - 2 &= \textcolor{#e03131}{\mathbf{4}} & \qquad 9 - 1 &= \textcolor{#e03131}{\mathbf{8}} \\ 4 + 2 &= \textcolor{#e03131}{\mathbf{6}} & \qquad 5 - 1 &= \textcolor{#e03131}{\mathbf{4}} & \qquad 7 + 2 &= \textcolor{#e03131}{\mathbf{9}} \\ 6 + 1 &= \textcolor{#e03131}{\mathbf{7}} & \qquad 8 + 2 &= \textcolor{#e03131}{\mathbf{10}} & \qquad 8 - 2 &= \textcolor{#e03131}{\mathbf{6}} \\ 7 - 1 &= \textcolor{#e03131}{\mathbf{6}} & \qquad 5 + 1 &= \textcolor{#e03131}{\mathbf{6}} & \qquad 3 + 2 &= \textcolor{#e03131}{\mathbf{5}} \end{aligned}\]
\[\begin{aligned} 4 - 2 + 1 &= \textcolor{#e03131}{\mathbf{3}} & \qquad 9 - 2 - 1 &= \textcolor{#e03131}{\mathbf{6}} \\ 1 + 2 + 2 &= \textcolor{#e03131}{\mathbf{5}} & \qquad 3 + 2 + 1 &= \textcolor{#e03131}{\mathbf{6}} \\ 5 + 1 - 2 &= \textcolor{#e03131}{\mathbf{4}} & \qquad 7 - 1 + 2 &= \textcolor{#e03131}{\mathbf{8}} \end{aligned}\]
