\[\boxed{\mathbf{Страница}\mathbf{\ \ 37}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{89}\mathbf{.}\mathbf{\ }}\]
\[5 \cdot 5 \Longrightarrow 25 - 8 \Longrightarrow 17 + 4 \Longrightarrow\]
\[\Longrightarrow 21\ :7 \Longrightarrow 3 \cdot 6 \Longrightarrow 18\ :9 \Longrightarrow\]
\[\Longrightarrow 2 \cdot 4 \Longrightarrow 8 - 3 \Longrightarrow 5 \cdot 5\]
\[\boxed{\mathbf{90}\mathbf{.}\mathbf{\ }}\]
\[36\ :4\] | \[36\ :6\] | \[18\ :9\] | \[18\ :6\] | \[24\ :4\] | \[24\ :6\] | \[35\ :5\] | \[36\ :9\] | \[25\ :5\] |
---|---|---|---|---|---|---|---|---|
\[9\] | \[6\] | \[2\] | \[3\] | \[6\] | \[4\] | \[7\] | \[4\] | \[5\] |
\[\boxed{\mathbf{91}\mathbf{.}\mathbf{\ }}\]
\[P = 2 \cdot (4 + 2) = 2 \cdot 6 =\]
\[= 12\ (см) - периметр\ \]
\[прямоугольника.\]
\[12\ :4 = 3\ (см) - сторона\ \]
\[квадрата.\]