\[\boxed{\mathbf{10.}}\]
\[Проверка:\]
\[\boxed{\mathbf{11.}}\]
\[270\ :3 = 90 + 110 =\]
\[= 200\ :100 = 2 \cdot 7 = 14\ (О)\]
\[(Е)\ 3 \cdot 90 = 270\ :5 = 54\ :9 =\]
\[= 6 \cdot 100 = 600\ (Ч)\]
\[(К)\ 360\ :4 = 90 \cdot 3 =\]
\[= 270 - 30 = 240\ :8 = 30\ (С)\]
\[(В)\ 64\ :4 = 16 \cdot 20 =\]
\[= 320 - 50 = 270\ :2 = 135\ (Р)\]
\[30\] | \[64\] | \[3\] | \[135\] | \[600\] | \[14\] | \[360\] |
---|---|---|---|---|---|---|
\[С\] | \[В\] | \[Е\] | \[Р\] | \[Ч\] | \[О\] | \[К\] |
\[\boxed{\mathbf{12.}}\]
\[1)\ 40 \cdot 10 = 400\ \left( см^{2} \right) - \ \]
\[площадь\ прямоугольника.\]
\[2)\ 20 \cdot 20 = 400\ \left( см^{2} \right) - \ \]
\[площадь\ квадрата.\]
\[Ответ:площади\ фигур\ равны.\]