(1003*1001)/(2003*2003+40

(1003*1001)/(2003*2003+4006-3)

4个回答

(1003*1001)/(2003*2003+4006-3)
=(1003*1001)/(2003*2003+2*2003-3)
=(1003*1001)/(2003-1)(2003+3)
=(1003*1001)/(2002*2006)
=1/4