Does your tree have a palmately-arranged leaf or a pinnately-arranged leaf?
Palmately-arranged leaf
Tree has 5 or more leaflets; in a palmately arranged leaf -- leaflets all attach to the leaf stem at the same place (hand-shaped)
OR
Pinnately-arranged leaf
Tree has 3 or more leaflets; in a pinnately arranged leaf -- leaflets are arranged along both sides of a common midrib; with or without a terminal leaflet