Страница 45, ГДЗ по математике за 2 класс к тренажёру Погореловой
Умножение и деление на 3
\[3 \quad 6 \quad \textcolor{#e03131}{\mathbf{9}} \quad \textcolor{#e03131}{\mathbf{12}} \quad \textcolor{#e03131}{\mathbf{15}} \quad \textcolor{#e03131}{\mathbf{18}} \quad \textcolor{#e03131}{\mathbf{21}} \quad \textcolor{#e03131}{\mathbf{24}} \quad \textcolor{#e03131}{\mathbf{27}} \quad 30\] \[30 \quad 27 \quad \textcolor{#e03131}{\mathbf{24}} \quad \textcolor{#e03131}{\mathbf{21}} \quad \textcolor{#e03131}{\mathbf{18}} \quad \textcolor{#e03131}{\mathbf{15}} \quad \textcolor{#e03131}{\mathbf{12}} \quad \textcolor{#e03131}{\mathbf{9}} \quad \textcolor{#e03131}{\mathbf{6}} \quad 3\]
\[\begin{aligned} 3 + 3 + 3 + 3 + 3 &= \textcolor{#e03131}{\mathbf{3}} \textcolor{#e03131}{\cdot} \textcolor{#e03131}{\mathbf{5}} = \textcolor{#e03131}{\mathbf{15}} \\ 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 &= \textcolor{#e03131}{\mathbf{3}} \textcolor{#e03131}{\cdot} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{27}} \\ 3 + 3 + 3 + 3 + 3 + 3 + 3 &= \textcolor{#e03131}{\mathbf{3}} \textcolor{#e03131}{\cdot} \textcolor{#e03131}{\mathbf{7}} = \textcolor{#e03131}{\mathbf{21}} \end{aligned}\]
\[\begin{aligned} 3 \cdot 4 &= \textcolor{#e03131}{\mathbf{12}} & \qquad 3 \cdot 1 &= \textcolor{#e03131}{\mathbf{3}} & \qquad 3 \cdot 6 &= \textcolor{#e03131}{\mathbf{18}} \\ 3 \cdot 7 &= \textcolor{#e03131}{\mathbf{21}} & \qquad 3 \cdot 3 &= \textcolor{#e03131}{\mathbf{9}} & \qquad 8 \cdot 3 &= \textcolor{#e03131}{\mathbf{24}} \\ 9 \cdot 3 &= \textcolor{#e03131}{\mathbf{27}} & \qquad 2 \cdot 3 &= \textcolor{#e03131}{\mathbf{6}} & \qquad 3 \cdot 5 &= \textcolor{#e03131}{\mathbf{15}} \end{aligned}\]
\[\begin{aligned} 6 : 3 &= \textcolor{#e03131}{\mathbf{2}} & \qquad 27 : 3 &= \textcolor{#e03131}{\mathbf{9}} & \qquad 21 : 3 &= \textcolor{#e03131}{\mathbf{7}} \\ 3 : 3 &= \textcolor{#e03131}{\mathbf{1}} & \qquad 18 : 3 &= \textcolor{#e03131}{\mathbf{6}} & \qquad 15 : 3 &= \textcolor{#e03131}{\mathbf{5}} \\ 9 : 3 &= \textcolor{#e03131}{\mathbf{3}} & \qquad 12 : 3 &= \textcolor{#e03131}{\mathbf{4}} & \qquad 24 : 3 &= \textcolor{#e03131}{\mathbf{8}} \end{aligned}\]
