\[\boxed{\mathbf{Вариант\ 2.}}\]
\[\boxed{\mathbf{1.}}\]
\[1)\ 3 \cdot 9 = 27\]
\[7 \cdot 3 = 21\]
\[3 \cdot 4 = 12\]
\[4 \cdot 6 = 24\]
\[36\ :4 = 9\]
\[20\ :5 = 4\]
\[18\ :6 = 3\]
\[28\ :7 = 4\]
\[7 \cdot 2 = 14\]
\[8 \cdot 4 = 32\]
\[2 \cdot 8 = 16\]
\[27\ :9 = 3\]
\[2)\ 70 + 5 \cdot (12 - 8) =\]
\[= 70 + 20 = 90\]
\[12\ :6 + 6 \cdot 3 = 2 + 18 = 20\]
\[60 + 3 \cdot 8 = 60 + 24 = 84\]
\[\boxed{\mathbf{2.}}\]
\[4 \cdot 5 + 6 = 20 + 6 =\]
\[= 26\ (попугаев) - в\ клетках\ \]
\[всего.\]
\[Ответ:26\ попугаев.\]
\[\boxed{\mathbf{3.}}\]
\[18\ :9 = 10\ :5\]
\[18\ :3 = 3 \cdot 2\]
\[12\ :6 = 14\ :7\]
\[\boxed{\mathbf{4.}}\]
\[8\ :4 \cdot 9 = 18\]
\[3 \cdot 3\ :9 = 1\]
\[6 \cdot 4\ :8 = 3\]