Страница 57, ГДЗ по математике за 2 класс к тренажёру Погореловой
Умножение и деление на 9
\[9 \quad 18 \quad \textcolor{#e03131}{\mathbf{27}} \quad \textcolor{#e03131}{\mathbf{36}} \quad \textcolor{#e03131}{\mathbf{45}} \quad \textcolor{#e03131}{\mathbf{54}} \quad \textcolor{#e03131}{\mathbf{63}} \quad \textcolor{#e03131}{\mathbf{72}} \quad \textcolor{#e03131}{\mathbf{81}} \quad 90\] \[90 \quad 81 \quad \textcolor{#e03131}{\mathbf{72}} \quad \textcolor{#e03131}{\mathbf{63}} \quad \textcolor{#e03131}{\mathbf{54}} \quad \textcolor{#e03131}{\mathbf{45}} \quad \textcolor{#e03131}{\mathbf{36}} \quad \textcolor{#e03131}{\mathbf{27}} \quad \textcolor{#e03131}{\mathbf{18}} \quad 9\]
\[\begin{aligned} 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 &= \textcolor{#e03131}{\mathbf{9}} \textcolor{#e03131}{\cdot} \textcolor{#e03131}{\mathbf{10}} = \textcolor{#e03131}{\mathbf{90}} \\ 9 + 9 + 9 + 9 &= \textcolor{#e03131}{\mathbf{9}} \textcolor{#e03131}{\cdot} \textcolor{#e03131}{\mathbf{4}} = \textcolor{#e03131}{\mathbf{36}} \\ 9 + 9 + 9 + 9 + 9 &= \textcolor{#e03131}{\mathbf{9}} \textcolor{#e03131}{\cdot} \textcolor{#e03131}{\mathbf{5}} = \textcolor{#e03131}{\mathbf{45}} \end{aligned}\]
\[\begin{aligned} 9 \cdot 3 &= \textcolor{#e03131}{\mathbf{27}} & \qquad 9 \cdot 5 &= \textcolor{#e03131}{\mathbf{45}} & \qquad 9 \cdot 9 &= \textcolor{#e03131}{\mathbf{81}} \\ 9 \cdot 8 &= \textcolor{#e03131}{\mathbf{72}} & \qquad 9 \cdot 1 &= \textcolor{#e03131}{\mathbf{9}} & \qquad 9 \cdot 6 &= \textcolor{#e03131}{\mathbf{54}} \\ 9 \cdot 4 &= \textcolor{#e03131}{\mathbf{36}} & \qquad 9 \cdot 7 &= \textcolor{#e03131}{\mathbf{63}} & \qquad 9 \cdot 2 &= \textcolor{#e03131}{\mathbf{18}} \end{aligned}\]
\[\begin{aligned} 63 : 9 &= \textcolor{#e03131}{\mathbf{7}} & \qquad 45 : 9 &= \textcolor{#e03131}{\mathbf{5}} & \qquad 72 : 9 &= \textcolor{#e03131}{\mathbf{8}} \\ 9 : 9 &= \textcolor{#e03131}{\mathbf{1}} & \qquad 18 : 9 &= \textcolor{#e03131}{\mathbf{2}} & \qquad 27 : 9 &= \textcolor{#e03131}{\mathbf{3}} \\ 54 : 9 &= \textcolor{#e03131}{\mathbf{6}} & \qquad 81 : 9 &= \textcolor{#e03131}{\mathbf{9}} & \qquad 36 : 9 &= \textcolor{#e03131}{\mathbf{4}} \end{aligned}\]
