\(\dfrac{1}{1}-\dfrac{1}{2000}=\dfrac{2000}{2000}-\dfrac{1}{2000}=\dfrac{1999}{2000}\)
\(\dfrac{1}{1}-\dfrac{1}{2000}=\dfrac{2000}{2000}-\dfrac{1}{2000}=\dfrac{1999}{2000}\)
a, \(\dfrac{1}{1}-\dfrac{1}{2000}=\dfrac{1999}{2000}\)
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