Страница 54, ГДЗ по математике за 3 класс к тренажёру Погореловой
Умножение и деление. Приёмы устных вычислений
\[\begin{aligned} 4\text{ сот.} \cdot 2 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em}\text{ сот.} & \qquad 300 \cdot 3 &= \textcolor{#e03131}{\mathbf{900}} \\ 2\text{ сот.} \cdot 3 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em}\text{ сот.} & \qquad 200 \cdot 4 &= \textcolor{#e03131}{\mathbf{800}} \\ 3\text{ сот.} \cdot 3 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em}\text{ сот.} & \qquad 300 \cdot 2 &= \textcolor{#e03131}{\mathbf{600}} \\ 2\text{ сот.} \cdot 5 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em}\text{ сот.} & \qquad 500 \cdot 2 &= \textcolor{#e03131}{\mathbf{1\,000}} \end{aligned}\]
\[\begin{aligned} 6\text{ сот.} : 2 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\text{ сот.} & \qquad 800 : 2 &= \textcolor{#e03131}{\mathbf{400}} \\ 9\text{ сот.} : 3 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\text{ сот.} & \qquad 600 : 3 &= \textcolor{#e03131}{\mathbf{200}} \\ 8\text{ сот.} : 4 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}\text{ сот.} & \qquad 800 : 4 &= \textcolor{#e03131}{\mathbf{200}} \\ 10\text{ сот.} : 2 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}\text{ сот.} & \qquad 1\,000 : 5 &= \textcolor{#e03131}{\mathbf{200}} \end{aligned}\]
\[\begin{aligned} 6\text{ дес.} \cdot 4 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\text{ дес.} & \qquad 72\text{ дес.} : 8 &= \textcolor{#e03131}{\mathbf{9}}\text{ дес.} \\ 8\text{ дес.} \cdot 5 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em}\text{ дес.} & \qquad 28\text{ дес.} : 4 &= \textcolor{#e03131}{\mathbf{7}}\text{ дес.} \\ 3\text{ дес.} \cdot 7 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\text{ дес.} & \qquad 56\text{ дес.} : 7 &= \textcolor{#e03131}{\mathbf{8}}\text{ дес.} \\ 9\text{ дес.} \cdot 6 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\text{ дес.} & \qquad 35\text{ дес.} : 5 &= \textcolor{#e03131}{\mathbf{7}}\text{ дес.} \\ 4\text{ дес.} \cdot 3 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}\text{ дес.} & \qquad 48\text{ дес.} : 6 &= \textcolor{#e03131}{\mathbf{8}}\text{ дес.} \end{aligned}\]
