\[\boxed{\mathbf{Страница}\mathbf{\ 22}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{20}\mathbf{.}\mathbf{\ }}\]
\[1)\ 6\ см \cdot 5\ см = 30\ \left( см^{2} \right) -\]
\[площадь\ большого\ \]
\[прямоугольника.\]
\[2)\ 2\ см \cdot 2\ см = 4\ \left( см^{2} \right) -\]
\[площадь\ каждого\ белого\ \]
\[квадрата.\]
\[3)\ 30 - 2 \cdot 4 = 22\ \left( см^{2} \right) -\]
\[площадь\ раскрашенной\ \]
\[фигуры.\]
\[Ответ:22\ см^{2}.\]
\[\boxed{\mathbf{21}\mathbf{.}\mathbf{\ }}\]
\[3069,\ 3096,\ 3609,\ 3906,\ 6039,\ \]
\[6093,6309,\ 6903,\ 9036,\ 9063.\]
\[\boxed{\mathbf{22}\mathbf{.}\mathbf{\ }}\]
\[70 \cdot 5000 = 350\ 000\]
\[600 \cdot 300 = 180\ 000\]
\[60 \cdot 80 = 4800\]
\[5600\ :7 = 800\]
\[5400\ :60 = 90\]
\[2100\ :30 = 70\]
\[\boxed{\mathbf{23}\mathbf{.}\mathbf{\ }}\]
\[d\] | \[630\] | \[1900\] | \[5600\] | \[800\] | \[3600\] | \[640\] | \[2100\] |
---|---|---|---|---|---|---|---|
\[c\] | \[3\] | \[100\] | \[70\] | \[400\] | \[90\] | \[8\] | \[700\] |
\[d\ :c\] | \[210\] | \[19\] | \[80\] | \[2\] | \[40\] | \[80\] | \[3\] |