Vì bớt mẫu số , tử số giữ nguyên nên phân số :

5/6 = 25/30 

Vậy số a là :

37 - 30 = 7 

Đ/S:.....

1. C

2. I

3. F

4. A

5. G

6. J

7. B

8. D

28The water wasn't hot enough for the children to swim.

29Are you interested in listening to music ?

30The living room is lighter than the kitchen.

31This house belongs to Mr.Ba.

28D

29A

30C

31B

32B

23C

24D

25A

26C

27D

6 đĩa.

A. 2 cm

B. 169 m2

1. in

2. in

3. on

4. on 

5. on

6. by

7. in

8. by

9. on

10. on

9. 24 dm2

10. 500 ml

A