1.2005*2003/2004 2.2003*20042004-2004*20032003 脱式计算1：2005*2003/2004，2 ：2003*20042004-2004*20032003 脱式计算要算式和答案

1=(2004 1)(2004一1)/2004
=(2004²一1²)/2004
=2004²/2004一1/2004
=2004一1/2004
=2003又2003/2004
2=2003x20042004一(2003十1)x20032003
=2003x20042004一2003x20032003一20032003
=2003x(20042004一20032003)一20032003
=2003x10001一20032003
=20032003一20032003
=0

1.2005*2003/2004 = (2004+1)(2004-1)/2004= (2004^2-1)/2004= 2004-1/20042.2003*20042004-2004*20032003 = (2004-1)(2004*10000+2004*1) - 2004*[(2004-1)*10000+(2004-1)*1)]= (2004-1)*2004*10001 - 2004*(2004-...