Chiều rộng khu đất đó là:

      \(200.\dfrac{3}{4}=150\left(m\right)\)

Diện tích khu đất đó là:

       \(200.150=30.000\left(m^2\right)\)

Đổi \(30.000m^2=3ha\)

                      Đ/s: \(30.000m^2;3ha\)

\(a.4ha=40.000m^2\)

→ 1ha = 1hm²; 1ha = 10.000 m²; 4ha = 40.000 m²

\(20ha=200.000m^2\)

→ 1ha = 1hm²; 1ha = 10.000 m²; 20ha = 200.000 m²

\(b.1km^2=100ha;15km^2=1500ha\)

→ 1km² = 100ha; 15km²= 100 x 15 = 1500ha

đó vừa hôm kia xong

bài này quen lém, mk trả lời rùi ý

1 The book is more expensive than the newspaper.

2 The play is longer than the film.

3 He is taller than his wife.

4 The black car can do better than the red one.

5 Anna has got an IQ better than Jim.

6 Jim is stronger than John.

7 The Green building is older than the Park building.

8 Ho Chi Minh city is hotter than Ha Noi.

9 The new building is taller than the old building.

10 The fruit mixer is heavier than the electric stove.

IX

1. A

2. A

3. C

4. A

5. D

6. A

7. D

8. B

9. C

10. B

chậm hơn rùi, mk chậm qué

1. look up

2. get on

3. turn on

4. give up

5. take off

6. stand up

7. put out

8. look after 

9. put on

10. get off