5x^2 y^2 và -2 x^2y 

Ta có:

5x^2y^2⋅(−2)x^2y

=5.(-2) . x^2.x^2 . y^2.y

= -10.x^4.y^3

 I. Make question for the sentences using the question words in brackets.

1. The man with the white hat is my brother.(Who)

=> Who is your brother?

II. Rewrite the sentences so that the meaning doesn't change:

1. They like to travel to Nha Trang on their vacation.

They enjoy to traveling to Da Nang on their vacation.

2. Let's see a detective film.

How about going to see a detective film.

3. You should not watch TV too late.

You ought not to watch TV too late.

4. We enjoy playing footbal.

We are intersted in playing football.

5. What is your mother's job?

What does your mother do?

6. He looks after the sick people.

He takes care of sick people

7. How much are these rackets?

How much do these rackets cost?

8. How about eating out tonight?

Why don't we eat out tonight?

1. The Flower Festival is celebrated every year.

=> When the Flower Festival celebrated? 

2. We always have turkey on Thanksgiving.

=> What do we always have in Thanksgiving?

3. Peter went to Da Nang last month with his parents.

=> Who did Peter go to Da Nang with?

4. They participated in La Tomatina in 2013.

=> When they participated in La Tomatina?

5. These are my brother's pictures.

=>  Whose pictures are these?

6. The Elephant Race Festival will be held in Don Village next year.

=> Where will the elephant race festival be held next year?

7. The festival organisers' clothes are red, purple and yellow.

=> What color are the festival organizers' clothes?

8. People organise this festival to pray for better crops.

=> Why do people organiser this festival?

9. We decided the winners by tasting the dishes they cooked.

=> How they can decided the winners?

10. The festival lasts only one hour and a half.

=> How long does the festival lasts?

1. Chọn 1 ô

2. Nhập dấu bằng

3. Nhập địa chỉ của ô đó vào ô được chọn

4. Nhập một toán tử.

5. Chọn ô tiếp theo nhập địa chỉ của ô đó vào ô được chọn

6. Nhấn enter. Kết quả xuất hiện trong thanh công thức

có 2 kiểu dữ liệu trong ô tính

+ Dữ liệu số

+ Dữ liệu kí tự

1. won't they

2. shall we

3. isn't it

1. isn't she

2. wouldn't he

3. is it

4. will she

5. do you

When can we enjoy pho?

=> We can enjoy pho for all kind of meals during the day.

What are the noodles made from?

=> Noodles are made from the best variety of rice.

How is the broth for pho bo (beef noodle soup) and pho ga (chicken noodle soup) made?

=> Pho bo is made by stewing the bones of cows for a long time in a large pot.

     Pho ga is made by stewing chicken bones.

How is the chicken meat served with pho ga?

=> The chicken meat served with pho ga boneless and cut into slices.

Where can Pho be found?

=> In Ha Noi

What is the rice noodle make from?

=> Rice noodle made from the best variety of rice.

1. The dog is seen by me.

2. A present is given to me by my father.

3. Her younger brother is taken by Lan

4. This pen is left by me.

5. Our homework are asked by my teacher.