20022002÷20012001
=2002×10001÷(2001×10001)
=2002×10001÷2001÷10001
=2002÷2001
=2002/2001
97×2000-96×2001
=97×2000-(96×2000+96)
=97×2000-96×2000-96
=2000-96
=1904
20022002÷20012001
=2002×10001÷(2001×10001)
=2002×10001÷2001÷10001
=2002÷2001
=2002/2001
97×2000-96×2001
=97×2000-(96×2000+96)
=97×2000-96×2000-96
=2000-96
=1904