Choose the correct number to make the number statement true.  $$17-9+$$$$\textgreater15+3-8$$ 
Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers
$$15+3-8=10$$，$$17-9=8$$，$$8+\left( 2 \right)=10$$，$$number$$ has to be bigger than $$2$$ so $$5$$ fits the requirement. 