\(\left(2022\text{x}2023+2023\text{x}2024\right)\text{x}\left(2023\text{x}99-2022\text{x}99-99\right)\)

\(=2023\text{x}\left(2022+2024\right)\text{x}99\text{x}\left(2023-2022-1\right)\)

\(=0\text{x}2023\text{x}4046\text{x}99=0\)

(2022 x 2023 + 2023 x 2024) x (2023 x 99 - 2022 x 99 - 99)

= (2022 + 2024) x 2023 x (2023 - 2022 - 1) x 99

= (2022 + 2024) x 2023 x 0 x 99

= 0

1. I hope I ___________the exam.

a. will pass b. pass c. will passes d. am passing

2. He’s famous_____________ his invention.

a. of b. about c. for d. on

3. My father will _______________ me to the zoo tomorrow.

a. taking b. to take c. takes d. take

4. He enjoys_____________TV in his free time.

a. watching b. to watch c. watches d. wach

5. She goes swimming________________.

a. everyday b. everydays c. every day d. every Sundays

6. They ____________at home yesterday.

a. were b. was c. are d. is

7. We ______________ some flowers tomorrow.

a. will buy b. buy c. bought d. buying

8. Look! He _____________to music.

a. is listening b. listens c. are listening d. listen

9. _____________he eats breakfast, he will be hungry.

a. If b. Unless c. If not d. Because

10. If you don’t eat, you ____________hungry.

a. will b. are c. will be d. is

11. After supper, he went on_____________________ his homework.

a. do b. doing c. did d. does

12. I will tell him about it as soon as he_________________ back.

a. comes b. will come c. come d. to come

13. It was too late, so I had to go home_____________________ a hurry.

a. with b. on c. in d. for

14. He is working hard now, but he used to__________ very lazy.

a. was b. being c. is d. be

15. His father often makes him__________________ up early.

a. get b. to get c. gets d. getting

16. I like to travel _______________ a train.

a. on b. with c. through d. by

17. When you __________________ her, you will agree with me about it.

a. meet b. have meeting c. are meeting d. would meet

18. Look! Someone ______________________.

a. is coming b. are coming c. come d. coming

1.a 

Số khoai còn lại là:

\(25131\cdot\dfrac{2}{3}=16754\left(kg\right)\)

Số túi chia được là:

16754:3=5584(dư 2 kg)

cảm ơn

1. I hope I ___________the exam.

a. will pass b. pass c. will passes d. am passing

2. He’s famous_____________ his invention.

a. of b. about c. for d. on

3. My father will _______________ me to the zoo tomorrow.

a. taking b. to take c. takes d. take

4. He enjoys_____________TV in his free time.

a. watching b. to watch c. watches d. wach

5. She goes swimming________________.

a. everyday b. everydays c. every day d. every Sundays

6. They ____________at home yesterday.

a. were b. was c. are d. is

7. We ______________ some flowers tomorrow.

a. will buy b. buy c. bought d. buying

8. Look! He _____________to music.

a. is listening b. listens c. are listening d. listen

9. _____________he eats breakfast, he will be hungry.

a. If b. Unless c. If not d. Because

10. If you don’t eat, you ____________hungry.

a. will b. are c. will be d. is

11. After supper, he went on_____________________ his homework.

a. do b. doing c. did d. does

12. I will tell him about it as soon as he_________________ back.

a. comes b. will come c. come d. to come

13. It was too late, so I had to go home_____________________ a hurry.

a. with b. on c. in d. for

14. He is working hard now, but he used to__________ very lazy.

a. was b. being c. is d. be

15. His father often makes him__________________ up early.

a. get b. to get c. gets d. getting

16. I like to travel _______________ a train.

a. on b. with c. through d. by

17. When you __________________ her, you will agree with me about it.

a. meet b. have meeting c. are meeting d. would meet

18. Look! Someone ______________________.

a. is coming b. are coming c. come d. coming

1. I hope I ___________the exam.

a. will pass b. pass c. will passes d. am passing

2. He’s famous_____________ his invention.

a. of b. about c. for d. on

3. My father will _______________ me to the zoo tomorrow.

a. taking b. to take c. takes d. take

4. He enjoys_____________TV in his free time.

a. watching b. to watch c. watches d. wach

5. She goes swimming________________.

a. everyday b. everydays c. every day d. every Sundays

6. They ____________at home yesterday.

a. were b. was c. are d. is

7. We ______________ some flowers tomorrow.

a. will buy b. buy c. bought d. buying

8. Look! He _____________to music.

a. is listening b. listens c. are listening d. listen

9. _____________he eats breakfast, he will be hungry.

a. If b. Unless c. If not d. Because

help

tick thật à ?

\(\dfrac{3}{2\text{x}4}+\dfrac{3}{4\text{x}6}+...+\dfrac{3}{48\text{x}50}\)

\(=\dfrac{3}{2}\text{x}\left(\dfrac{2}{2\text{x}4}+\dfrac{2}{4\text{x}6}+...+\dfrac{2}{48\text{x}50}\right)\)

\(=\dfrac{3}{2}\text{x}\left(\dfrac{1}{2}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{6}+...+\dfrac{1}{48}-\dfrac{1}{50}\right)\)

\(=\dfrac{3}{2}\text{x}\left(\dfrac{1}{2}-\dfrac{1}{50}\right)=\dfrac{3}{2}\text{x}\dfrac{24}{50}=\dfrac{36}{50}=\dfrac{18}{25}\)

\(\dfrac{2}{3}A=\dfrac{2}{2\times4}+\dfrac{2}{4\times6}+...\dfrac{2}{48\times50}\)

\(\dfrac{2}{3}A=\dfrac{4-2}{2\times4}+\dfrac{6-4}{4\times6}+...+\dfrac{50-48}{48\times50}\)

\(\dfrac{2}{3}A=\dfrac{4}{2\times4}-\dfrac{2}{2\times4}+\dfrac{6}{4\times6}-\dfrac{4}{4\times6}+...+\dfrac{50}{48\times50}-\dfrac{48}{48\times50}\)

\(\dfrac{2}{3}A=\dfrac{1}{2}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{6}+...+\dfrac{1}{48}-\dfrac{1}{50}\)

\(\dfrac{2}{3}A=\dfrac{1}{2}-\dfrac{1}{50}\)

\(\dfrac{2}{3}A=\dfrac{12}{25}\)

\(A=\dfrac{12}{25}\div\dfrac{2}{3}\)

\(A=\dfrac{18}{25}\)

x+(x+1)+(x+2)+...+(x+10)=88

=>11x+(1+2+...+10)=88

=>11x+55=88

=>x+5=8

=>x=3

x + ( x + 1 ) + ( x +2 )+...+( x +10) = 88

  11 x + ( 1 + 2 + ... + 10 ) = 88

  11 x + 55 = 88

   x + 5 = 8

x=3

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