`D = 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + 9 +...+ 2022`
`D = (1+ 2 - 3 - 4) + (5 + 6 - 7 - 8) +...+ (2017 + 2018 - 2019 - 2020) + 2021 + 2022`
`D = 4 + 4 +...+ 4 + 2021 + 2022`
`D = -4 . 505 + 2021 + 2022`
`D = -2020 + 2021 + 2022`
`D = 1 + 2022`
`D = 2023`
$\text{Vậy}$ `D = 2023`