53. - “Must I finish my homework now?”                       - “_______”

A. Yes, you may.          B. Yes, you need it.   C. No. you can’t.          D. No, you needn’t.

54. - “Thank you very much for your help.”                           - “_______”

A. Thank you very much too.                     B. How nice of you to say so!

C. Yes. That’s alright.                     D. You’re welcome.

55. - “Mum, I’ve won the girls’ long jump.”                                 - “_______”

A. It’s nothing.         B. All right.               C. Congratulations!         D. Don’t be proud!

56. Jim: “What about collecting used paper, bottles, and plastic bags every day?’"

           Ha and Mai: “_______”

A. Because they can pollute the environment. B. How come? Who can do that?

C. That's a very good idea. Let's do that.               D. What about this weekend?

57. Phuong: “I'm taking my TOEFL test tomorrow.”                    - Daisy: “_______”

           A. Good fortune.       B. Good luck.     C. Good outcome.            D. success.

58. - “Well done! That’s a very nice picture!”                   - “_______”

A. Thanks. It’s nice of you to say so.                       B. Wow. What’s a nice compliment!

C. Yes. I think so too.                                                      D. Right. I’ve painted a nice picture.

\(10A=\dfrac{10^{2021}+1+9}{10^{2021}+1}=1+\dfrac{9}{10^{2021}+1}\)

\(10B=\dfrac{10^{2022}+1+9}{10^{2022}+1}=1+\dfrac{9}{10^{2022}+1}\)

mà \(10^{2021}+1< 10^{2022}+1\)

nên A>B

[53+(-76)]-[(-76)-(-53)]

=53+(-76)+76+(-53)

=[53+(-53)]+[(-76)+76]

=0+0=0

k cho mk nhé

a, (-16).75.125.(-2)

= (-8). 2 . 125. 75. (-2)

= (-8).125 . (-2). 2.75

= -1000. (-300)

= 300 000

b,(-137).73 - 137.27

= (-137). 73 + (-137). 27

= (-137). (73+27)

= -137. 100

= - 13700

a) 461 + (x – 45) = 387

x – 45 = 387 – 461

x – 45 = -74

x = -74 + 45

x = -29

Vậy x = -29

b) 11 – (-53 + x) = 97

-53 + x = 11 – 97

-53 + x = -86

x = -86 – (-53)

x = -33

Vậy x = -33

c) -(x + 84) + 213 = -16

-(x + 84) = -16 – 213

-(x + 84) = -229

-x – 84 = -229

-x = -229 + 84

-x = -145

\(\Rightarrow\)x = 145

Vậy x = 145

Tick cho mình nhé!!!

a, (-17) + (-83)

= -(17 + 83)

= 100

b, 2².(-115) + 15.2² - 2022⁰

= -2².(115 - 15) - 1

= -4.100 - 1

= -400 - 1

= -401

c, -53.(-25) + 53.(-89) + (-6)².(-53)

=    53.25 - 53.89 - 53.36

= 53.(25 - 89 - 36)

= 53. (-100)

= - 5300 

`#3107.101107`

`a,`

`45 - (29 + 45)`

`= 45 - 29 - 45`

`= -29`

`b,`

`202 - (202 + 148)`

`= 202 - 202 - 148`

`= -148`

`c,`

`(209 - 140) - 97 - 140 - 209`

`= 209 - 140 - 97 - 140 - 209`

`= (209 - 209) - (140 +140) - 97`

`= -280 - 97`

`= -377`

`d,`

`(2021-2022)-(2023-2022)`

`= 2021 - 2022 - 2023 + 2022`

`= 2021 - 2023 - (2022 - 2022)`

`= 2 - 0 = 2`

a) \(\dfrac{17}{20}< \dfrac{18}{20}< \dfrac{18}{19}\Rightarrow\dfrac{17}{20}< \dfrac{18}{19}\)

b) \(\dfrac{19}{18}>\dfrac{19+2024}{18+2024}=\dfrac{2023}{2022}\Rightarrow\dfrac{19}{18}>\dfrac{2023}{2022}\)

c) \(\dfrac{135}{175}=\dfrac{27}{35}\)

\(\dfrac{13}{17}=\dfrac{26}{34}< \dfrac{26+1}{34+1}=\dfrac{27}{35}\)

\(\Rightarrow\dfrac{13}{17}< \dfrac{135}{175}\)

2021/2022=(2022-1)/2022=1-1/2022

 2022/2023=(2023-1)/2023=1-1/2023

Do: 2022<2023

=>1/2022>1/2023

=>1-1/2022<1-1/2023

Vậy 2021/2022 < 2022/2023

\(\frac{2021}{2022}< \frac{2022}{2023}\)

@Cỏ

#Forever

ai chả bik nhưng làm hẳn ra chứ

Đặt A=2+2⁴+2⁶+....+2²⁰²²

=> 2².A=2².(2+2⁴+2⁶+....+2²⁰²²)

=>4A=2⁴+2⁶+....+2²⁰²⁴

=>4A-A=(2⁴+2⁶+....+2²⁰²⁴)-(2+2⁴+2⁶+....+2²⁰²²)

=>3A =2⁴+2⁶+....+2²⁰²⁴-2-2⁴-2⁶-....-2²⁰²²

=>3A=2²⁰²⁴-2

=>A=\(\frac{2^{2024}-2}{3}\)

Vậy =>A=\(\frac{2^{2024}-2}{3}\)

TK MK NHA BN

*****CHÚC BẠN HỌC GIỎI*****