Đáp số: 250

Đây là cách làm lớp 6 nên bạn cố gắng suy nghĩ nhé!

Số số hạng là: \(\frac{\left(997-1\right)}{2}+1=499\)( số hạng)

Tổng trên là: \(\frac{\left(997+1\right).499}{2}=249001\)

  Đáp án là: \(249001\) . k nha. Nếu muốn biết rõ thêm về công thức của bài này thì nhắn tin cho mình nhé!

Tìm x:

\(2\left(x-1\right)+3\left(x+3\right)=-8\)

\(\Leftrightarrow2x-2+3x+9=-8\)

\(\Leftrightarrow5x=-8+2-9\)

\(\Leftrightarrow5x=-15\)

\(\Leftrightarrow x=-3\)

Vậy \(x=-3\)

1.I cannot drive a car.

\(\Rightarrow\) I wish I could drive a car.

2.We started doing our test at 9:00 am.

\(\Rightarrow\) We have done our test at 9:00 am.

3.Ken began to play soccer 30 minutes ago.

\(\Rightarrow\) Ken has played soccer for 30 minutes.

4.A famous writer wrote these poem in 1990.

\(\Rightarrow\) These poems were written by a famous writer in 1990.

815+[95+(-815)+(-45)]

\(=\) 815+(95-815-45)

\(=\) 815+95-815-45

\(=\) 50

I think it is necessary for secondary school students to wear uniform at school because of the following reasons. Firstly, wearing uniform helps students feel equal in many ways, whether they are rich or poor. Secondly, wearing uniform encourages students to be pround of their school. Finally, wearing uniform is practical. The students do not have to think of what to wear everyday. Therefore, secondary school students should wear uniform.

Bài 1: Supply the correct verb form:

1. She asked me whether I ..bought..that car.

2. She asked him where he ..was...from.

3. They said that they ..sold..their house.

4. I asked them if they ..passed..the final exam.

5. I asked him if he ..could..help me.

6. She said to me that she..would sell.. that car the following day.

7. He asked me where I ..had gone..the previous day.

8. The teacher asked her why she ..didn't do..the test.

9. I asked her if she ..passed..the final exam.

10. They asked him if he..had to..go then.

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câu 2 bn có chép sai k z

Bài 2: Fill in each gap with a suitable presosition:

1. Maryam was really impressed..by..the beauty of Hue.

2 It seems difficult..for..me to meet her now

3. If you have any trouble, ask..for..help

4. This guide book is full..of..useful information

5. We still keep in touch..to..each other although we live away..from..each other

6. He will go to China..at..the end..of..this week

7. She went out..without..saying a word

8. What do you often do..at..this weekends?

9. She was born..on..September 15th

10. My exam is..at..2o'clock..on..Monday

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Bài 1: Supply the correct word form

1. She was really..impressed..by the beauty of the city (impress)

2. She made a deep..impression..on the members of her class (impress)

3. Their..friendliness..made me happy (friendly)

4. Many..visitors..come to Ho Chi Minh's Mausoleum every day (visit)

5. We enjoyed the..peaceful..atmosphere in Hanoi (peace)

6. Hanoi is not..different..from Kuala Lumpur (difference)

7. The girls went to see..famous..places in HCMC (fame)

8. The..national..language in Maylaysia is Bahasa Maylaysia (nation)

9. In Maylaysia, ..education..is free (educate)

10. What is the main language of..instruction..at that school? (instruc)

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