\[\boxed{\mathbf{8.}}\]
\[Увеличить\ на\ 5:\]
\[35 + 5 = 40\]
\[45 + 5 = 50\]
\[55 + 5 = 60\]
\[60 + 5 = 65\]
\[70 + 5 = 75\]
\[80 + 5 = 85\]
\[90 + 5 = 95\]
\[Уменьшить\ на\ 5:\]
\[35 - 5 = 30\]
\[45 - 5 = 40\]
\[55 - 5 = 50\]
\[60 - 5 = 55\]
\[70 - 5 = 65\]
\[80 - 5 = 75\]
\[90 - 5 = 85\]