Страница 36, ГДЗ по математике за 3 класс к проверочным работам Волковой. Серия "Школа России" к УМК Моро
Умножение и деление (продолжение). Площадь прямоугольника (квадрата). Проверочная работа 4. Вариант 1
\[\begin{aligned} &\begin{aligned} 1) & & 8 \cdot 0 &= \textcolor{#e03131}{\mathbf{0}} & \qquad 9 \cdot 1 &= \textcolor{#e03131}{\mathbf{9}} & \qquad 13 : 13 &= \textcolor{#e03131}{\mathbf{1}} \\ & & 1 \cdot 10 &= \textcolor{#e03131}{\mathbf{10}} & \qquad 0 \cdot 20 &= \textcolor{#e03131}{\mathbf{0}} & \qquad 40 + 0 &= \textcolor{#e03131}{\mathbf{40}} \\ & & 0 : 9 &= \textcolor{#e03131}{\mathbf{0}} & \qquad 10 \cdot 0 &= \textcolor{#e03131}{\mathbf{0}} & \qquad 30 - 0 &= \textcolor{#e03131}{\mathbf{30}} \end{aligned} \\[10pt] &\begin{aligned} 2) & & (92 \overset{\textcolor{#1a7f37}{1}}{-} 15) \mathbin{\overset{\textcolor{#1a7f37}{2}}{\vphantom{+}\cdot}} 0 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} & \qquad 67 \mathbin{\overset{\textcolor{#1a7f37}{1}}{\vphantom{+}\cdot}} 1 \overset{\textcolor{#1a7f37}{2}}{+} 9 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em} \end{aligned} \end{aligned}\]
\[\begin{aligned} 1 \cdot 18 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 36}}}{+} 18 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 1 \cdot 18 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 0}}}{-} 18 & \qquad 8 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 72}}\rule[-0.35em]{0pt}{0.35em}}{\cdot} 9 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 8 \cdot 9 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 81}}}{+} 9 \\ 0 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 0}}\rule[-0.35em]{0pt}{0.35em}}{\cdot} 54 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 54 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 54}}}{+} 0 & \qquad 6 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 42}}\rule[-0.35em]{0pt}{0.35em}}{\cdot} 7 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 6 \cdot 8 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 42}}}{-} 6 \end{aligned}\]
\(1)\ 6 \cdot 8 = \textcolor{#e03131}{\mathbf{48}}\text{ (кг)}\)
\(2)\ 4 \cdot 3 = \textcolor{#e03131}{\mathbf{12}}\text{ (кг)}\)
\(3)\ 48 + 12 = \textcolor{#e03131}{\mathbf{60}}\text{ (кг)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{60}}\) кг.
\[\begin{aligned} 0 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 0}}\rule[-0.35em]{0pt}{0.35em}}{:} a &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} a \overset{\mathclap{\textcolor{#808080}{\scriptstyle 0}}}{-} a & \qquad 0 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 0}}\rule[-0.35em]{0pt}{0.35em}}{\cdot} c &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} c \overset{\mathclap{\textcolor{#808080}{\scriptstyle c}}\rule[-0.35em]{0pt}{0.35em}}{\cdot} 1 \end{aligned}\] \(\textcolor{#808080}{\text{Если }{c = 0}\text{, то}}\) \(\textcolor{#808080}{{0 \cdot c = c \cdot 1}\text{.}}\)
