A = ( 2022 x 0,75 + 2022 : 4) - ( 2021 : 0,1 : 10)

= (2022 x 0,75 + 2022 x 0,25) - ( 2021 : 1/10 : 10)

= 2022 x(0,75+0,25) - 2021x 10 : 10

= 2022x 1 - 2021

= 2022 - 2021

=1

`2022+2022:1/3+2022+2022:1/5`

`=2022+2022xx3+2022+2022xx5`

`=2022xx(1+3+1+5)`

`=2022xx10=20220`

20220

`->2022+2022×3+2022+2022×5`

`->`\( 2022 × ( 1 + 3 + 1 + 5 )\)

`->2022xx10`

`->20220`

A=2022(1/1-1/2+1/2-1/3+...+1/2021-1/2022)

  =2022(1/1-1/2022)

 =2022.2021/2022

ket qua tu tinh nha

A = \(\dfrac{2022}{1.2}+\dfrac{2022}{2.3}+\dfrac{2022}{3.4}+...+\dfrac{2022}{2021.2022}\)

= \(\dfrac{2022}{1}-\dfrac{2022}{2}+\dfrac{2022}{2}-\dfrac{2022}{3}+\dfrac{2022}{3}-\dfrac{2022}{4}+...+\dfrac{2022}{2021}-\dfrac{2022}{2022}\)

= \(\dfrac{2022}{1}-\dfrac{2022}{2022}\)

= \(2021\)

Chúc bạn học tốt!! ^^

2022.( 1/1.2+ 1/2.3+...+ 1/2021+2022)

2022. ( 1-1/2+1/2-1/3+......+1/2021-1/2022)

2022.( 1-1/2022)

2022.2021/2022

2021

=2022x100=202200

= 2022 x ( 57 + 42 + 1 )

= 2022 x 100

= 202200

\(2022\times57+2022\times42+2022=2022\times\left(57+42+1\right)=2022\times\left(57+43\right)=2022\times100=202200.\)

X : (1+0,5+0,25+0,125)=2022

X : 1,875 = 2022

X = 1078,4

x+x:0,5+x:0,25+x:0,125 = 2022

x.(1+1/2+1/4+1/8) = 2022

x.15/8 = 2022

x = 2022: 15/8

x = 1078,4

\(x+x:0,5+x:0,25+x:0,125=2022\)

\(x\text{×}1+x\text{×}2+x\text{×}4+x\text{×8}=2022\)

\(x\text{×}\left(1+2+4+8\right)=2022\)

\(x\text{×}15=2022\)

\(x=2022:15\)

\(x=134,8\)

\(\dfrac{2022\times2023-1}{2023\times2021+2022}\)

= \(\dfrac{\left(2021+1\right)\times2023-1}{2023\times2021+2022}\)

= \(\dfrac{2023\times2021+2023-1}{2023\times2021+2022}\)

= \(\dfrac{2023\times2021+2022}{2023\times2021+2022}\)

= 1

2023×2021+20222022×2023−1​

= (2021+1)×2023−12023×2021+20222023×2021+2022(2021+1)×2023−1​

= 2023×2021+2023−12023×2021+20222023×2021+20222023×2021+2023−1​

= 2023×2021+20222023×2021+20222023×2021+20222023×2021+2022​

= 1