A

\(S=(-1)+2+(-3)+4+(-5)+6+...+(-2021)+2022\)

\(S = 1 + 1 +....+ 1\)

\(S= 1.2022 : 2 = 1011\)

Số bé \( (8 – 8) : 2 = 0\)

Số lớn \(0 + 8 = 8\)

\(=\)\(\dfrac{\text{1}}{\text{1}}\) \(-\dfrac{1}{2}\) \(+\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{4}+.....+\dfrac{1}{1999}-\dfrac{1}{2000}\)

\(=\dfrac{1}{1}-\dfrac{1}{2000}=\) \(\dfrac{\text{1999}}{2000}\)