\(=\frac{2001.\left(2000+2\right)+1000}{2001.\left(2000+3\right)-1001}\)
\(=\frac{2001.2000+2001.2+1000}{2001.2000+2001.3-1001}\)
\(=\frac{2001.2+1000}{2001.3-1001}\)
\(=\frac{2001.2+1000}{2001.2+2001-1001}\)
\(=\frac{2001.2+1000}{2001.2+1000}\)
\(=1\)
2001 x 2002 + 1000 / 2001 x 2003 - 1001 = 2001 x 2002 + 1000 / 2001 x (2002 + 1) - 1001 = 2001 x 2002 + 1000 / 2001 x 2002 + 2001 - 1001 = 1000 / 2001 - 1001 = 1000 / 1000 = 1
\(=\frac{2001\cdot\left(2003-1\right)+1000}{2001\cdot2003-1001}\)
\(=\frac{2001\cdot2002-2001-1000}{2001\cdot2003-1001}\)
\(=\frac{2001\cdot2002-1001}{2001\cdot2002-1001}\Rightarrow=1\)
\(\frac{2001\times2002+1000}{2001\times2003-1001}\)
\(=\frac{2001\times\left(2000+2\right)+1000}{2001\times\left(2000+3\right)-1001}\)
\(=\frac{2001\times2000+2001\times2+1000}{2001\times2000+2001\times3-1001}\)
\(=\frac{2001\times2+1000}{2001\times3-1001}\)
\(=\frac{2001\times2+1000}{2001\times2+2001-1001}\)
\(=\frac{2001\times2+1000}{2001\times2+1000}\)
\(=\frac{5002}{5002}\)
\(=1\)