\(2022+\left[19-9.\left(3-8\right)^2\right]\)
\(=2022+\left[19-9.25\right]\)
\(=2022+\left[19-225\right]\)
\(=2022+\left(-206\right)\)
\(=1816\)
= 2022+ [19-9. (-5)2]
= 2022+ [19-9.25]
= 2022+ [ 19-225]
= 2022+ (-206)
= 1816
\(2022+\left[19-9.\left(3-8\right)^2\right]\)
\(=2022+\left[19-9.25\right]\)
\(=2022+\left[19-225\right]\)
\(=2022+\left(-206\right)\)
\(=1816\)
= 2022+ [19-9. (-5)2]
= 2022+ [19-9.25]
= 2022+ [ 19-225]
= 2022+ (-206)
= 1816
Tính A=1-2-3+4-5-6+7-8-9+...+2022-2021-2022
Chứng minh rằng A = 8 + 8^2 + 8^3 + 8^4 + ... + 8^2021 + 8^2022 chia hết cho 9
B = 1 - 2 - 3 + 4 - 5 - 6 +7-8- 9 +...+ 2020 - 2021 - 2022
28/25-17/19-3/25+2022/2023-2/19
tính :
A= 1+2-3-4+5+6-7-8+9+...+2018-2019-2020+2021-2022
2+3-4+5+6-7+8+9-10+...+2015+2016-2017+2018+2019-2020+2021+2022
S = 1+2-3-4+5+6-7-8+9+10+ ..... + 2018-2019-2020+2021-2022+2023
2^3 nhân 5+3^19:3^17-2022^0
Tính hợp lý:
a) ( -5/6 + 2/5) : 3/8 + ( 4/5 - 11/30) : 3/8
b) (-3/4 + 2/5) : 3/7 + ( 3/5 + -1/4) : 3/7
c)-13/18 . 5/8 + -5/18 . 2/9 + -13/18 . 3/8 + -5/18 . 7/9
d) -11/19 . 4/9 + -8/19 . 3/7 + -11/19 . 5/9 + -9/19 . 4/7