1. We own this modern house.

This modern house is ours

2These are her shoes.

These shoes are hers

3Those fields belong to them

. Those fields are theirs

4This is our garden.

This garden is ours

5. These are his toys.

These toys are his

6. This dog belongs to her.

This dog is hers

7. They own this big farm.

This big farm is theirs

8. David and I own this red car.

This red car is ours

9. Lisa has a lovely dress.

A lovely dress is hers

10.He has got grey shorts.

Grey shorts are his

1. Overpopulation is a major problem in the city, isn't it ?

2. Children in slums don’t have enough food,do they ?

3. Wealthy people have better healthcare,don't they ?

4. Big cities have more problems,don't they ?

5. We can go to the countryside this weekend,can't we ?

6. Clean water shortages are not easy to solve,are they ?

7This city is overcrowded,isn't it ?

8. It’s not dangerous to visit a slum, is it?

9. Life is more exciting in the city,isn't it ?

10. Crime affects everyone in the city,doesn't it ?

1. Overpopulation is a major problem in the city,isn't it ?

2. Children in slums don’t have enough food, do they ?

3. Wealthy people have better healthcare, don't they?

4. Big cities have more problems, don't they ?

5. We can go to the countryside this weekend, can't we?

6. Clean water shortages are not easy to solve, are they ?

7This city is overcrowded, isn't it?

8. It’s not dangerous to visit a slum, isn't it?

9. Life is more exciting in the city, isn't it?

10. Crime affects everyone in the city, doesn't it?

sau dấu phẩy là chỗ để điền đề bài fill the blanks with the correct question tags

Máy tính để lmj hả Xu:<

Giúp bài 3 vì lười làm mấy bài kia:D

Người đó đi được số ki-lô-mét là:

10,8+9,52 =20,32(km)

mình làm vài câu cho bạn tham khảo,các câu còn lại thì bạn làm tương tự thôi

23.\(\sqrt{14-2\sqrt{33}}=\sqrt{\left(\sqrt{11}\right)^2-2.\sqrt{11}.\sqrt{3}+\left(\sqrt{3}\right)^2}\)

\(=\sqrt{\left(\sqrt{11}-\sqrt{3}\right)^2}=\left|\sqrt{11}-\sqrt{3}\right|=\sqrt{11}-\sqrt{3}\)

28. \(\sqrt{25-4\sqrt{6}}=\sqrt{\left(2\sqrt{6}\right)^2-2.2\sqrt{6}.1+1^2}=\sqrt{\left(2\sqrt{6}-1\right)^2}\)

\(=\left|2\sqrt{6}-1\right|=2\sqrt{6}-1\)

29.\(\sqrt{14-8\sqrt{3}}=\sqrt{14-2\sqrt{48}}=\sqrt{\left(\sqrt{8}\right)^2-2\sqrt{6}.\sqrt{8}+\left(\sqrt{6}\right)^2}\)

\(=\sqrt{\left(\sqrt{8}-\sqrt{6}\right)^2}=\left|\sqrt{8}-\sqrt{6}\right|=\sqrt{8}-\sqrt{6}\)

nhìn rối mắt quá bạn ơi

bạn hỏi nhiều câu thế , làm lâu lắm bạn

Giải:

Quãng đường ngày đầu đi được là:

\(\frac{1}{2+1}=\frac{1}{3}\) ( quãng đường AB )

Quãng đường ngày thứ 2 đi được là:

\(\frac{1}{3+1}=\frac{1}{4}\) ( quãng đường AB )

Quãng đường ngày thứ 3 đi được là:

\(\frac{1}{4+1}=\frac{1}{5}\) ( quãng đường AB )

Phân số chỉ quãng đường ngày cuối đi được là:
\(1-\left(\frac{1}{3}+\frac{1}{4}+\frac{1}{5}\right)=\frac{13}{60}\) ( quãng đường AB )

Độ dài quãng đường AB là:
\(52:\frac{13}{60}=240\) ( km )

Vậy quãng đường AB dài 240 km

240 km