Question

(2008+2009x2007)/(2009x2008-1)怎么简便运算

Answer 1

=[2008+(2008+1)×2007]/[(2008+1)×2008-1]
=[2008+2008×2007+2007]/[2008×2008+2007]
=(2008×2008+2007)/(2008×2008+2007)=1