\(\boxed{\mathbf{5.}}\)
\[9 + 3 \cdot 2 = 9 + 6 = 15\]
\[11 - 2 \cdot 4 = 11 - 8 = 3\]
\[2 \cdot 7 - 5 = 14 - 5 = 9\]
\[8 + 12\ :2 = 8 + 6 = 14\]
\[13 - 10\ :2 = 13 - 5 = 8\]
\[14\ :2 + 6 = 7 + 6 = 13\]
\[4 + 4 \cdot 4 = 4 + 16 = 20\]
\[15 - 3 \cdot 3 = 15 - 9 = 6\]
\[6 \cdot 3 - 9 = 18 - 9 = 9\]
\[11 - 18\ :2 = 11 - 9 = 2\]
\[7 + 15\ :3 = 7 + 5 = 12\]
\[20\ :4 + 8 = 5 + 8 = 13\]