3.3² - 5⁶ : 5⁴ + (2021 - 2020)²⁰⁰
= 3.9 - 5² + 1²⁰⁰
= 27 - 25 + 1
= 3
3.3² - 5⁶ : 5⁴ + (2021 - 2020)²⁰⁰
= 3.9 - 5² + 1²⁰⁰
= 27 - 25 + 1
= 3
1-2+3-4+5-6+...+2019-2020+2021
1 - 2 + 3 - 4 + 5 - 6 + 7 - 8 + ..... + 2019 - 2020 + 2021
1-2+3-4+5-6+...+2019-2020+2021
1-2+3-4+5-6+7-8+...+2019-2020+2021
Câu 30. Giá trị của tổng
S =1+ 2 - 3 - 4 + 5 + 6 - 7 - 8 + 9 +10 -... + 2018 - 2019 - 2020 + 2021 là
A. 2020 . B. 2021. C. 1. D. -1.
a) 5+3.(-7)+4:(-2)
b)1-2-3+4+5-6-7+8.....+2017-2018-2019+2020+2021
a, 1-2+3-4+5-6+....+2021-2022
b, 1-6+2-7+3-8+4-9+.......+35-40
c, -1+2-3+4-5+6-.........-2021+2022
d, 1-4+2-5+3-6+.....+197-200
e, -1-2-3-4-5-....-199-200
1+2-3-4+5-6-7-8+...-2019-2020+2021+2022
1+2-3-4+5+6-7-8-....-2019-2020+2021+2022 help
B = 1 - 2 - 3 + 4 - 5 - 6 +7-8- 9 +...+ 2020 - 2021 - 2022