Author(s): ZHI Ming
Pages: 30
Year: 2009 Issue:  1
Journal: School Journal of Mathematics
Abstract: 例1 计算20083-2×20082+1/20083+20082-3×2008-2.　　点拨:本题可直拉计算,但相当麻烦.如果设2008=a,将算式转化为分式,然后再化简求值,则较为简便.……