TÌm x, y, z biết: 3x = 4y = 5z-3x-4y và 2x+y= z-19

Số bé là:

1,05: (21-20)x20=21

Đáp số 21

2. What are Nam and Hung doing?

3. What will you do on Teacher's Day?

4. How many lessons do you have today?

5. How do you feel?

1 farmer 

    2. meal 

    3.  humid. 

    4. flat

    5. climate 

    6. mountains

    7.crop 

    8. region

. 

    9.geography

    10. coast

1.where

2.who

3.saw

4.what

5.zebras

6.favourite

7.when

8.quickly

1 slowly

2 beautiful

3 quickly

4 beautifully

5 noisy

6 quiet

7 quietly

8 well