2002乘2003减1分之2002+2003乘2001等于多少?

问题描述:

2002乘2003减1分之2002+2003乘2001等于多少?

(2002+2001×2003)/(2002×2003-1)
=((2002+(2002-1)(2002+1))/(2002×(2002+1)-1)
=(2002+2002^2-1)/(2002^2+2002-1)
=1

2002乘2003减1分之2002+2003乘2001
=2002乘2003减1分之2002+2003×(2002-1)
=2002乘2003减1分之2002+2003×2002-2003
=2002乘2003减1分之2003×2002-1
=1