\[\boxed{\mathbf{7.}}\]
\[1)\ 6 + 6 + 6 + 6 + 6 + 6 = 36\]
\[6 \cdot 6 = 36\]
\[2)\ 6 + 6 + 6 + 6 + 6 + 6 + 6 =\]
\[= 42\]
\[6 \cdot 7 = 42\]
\[3)\ 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 =\]
\[= 48\]
\[6 \cdot 8 = 48\]
\[6 \cdot 9 = 54\]
\[6 \cdot 10 = 60\]