⇒ 4 giờ 15 phút = 4,25 giờ

⇒ 15 giờ 90 phút = 16 giờ 30 phút

⇒ y × 5,4 = 9,12 × 2,7

y × 5,4 = 24,624

y = 24,624 : 5,4

y = 4,56.

12,4 × 62,35 + 12,4 × 27,34 + 12,4 × 10,31

= 12,4 × ( 62,35 + 27,34 + 10,31 )

= 12,4 × 100

= 1240.

32 × 2 = 64

BESPEAKING

\(\frac{9}{22}-\frac{2}{11}=\frac{9}{22}-\frac{4}{22}=\frac{5}{22}\)

2

0

có trăng, sao, mặt trời, mưa, nắng, tuyết ,...

1. She is listening to music now.

2. Look! They are playing football in the park.

3. I am doing my homework at the moment.

4. We are watching a movie right now.

5. My mother cooks dinner in the kitchen.

6. The baby cries because he is hungry.

7. They aren't study for the test now.

9. Listen ! Somene is knocking on the door.

8. What are you doing now?

11. My father reads a newspaper in the living room.

12. The students don't pay attention to the lesson.

13. Where are your sister going now?

14. The birds sings in the trees.

15. I am not use my phone at the moment.

16. He running in the park right now.

17. Look! The cat chasing a mouse.

18. Why are they shout so loudly?

19. We are have lunch at the moment.

20. My grandparents sit in the garden and drinking tea.

Đổi 1 phút = 60 giây

➜ 0,75 × 60 = 45 giây

Vậy 0,75 phút = 45 giây.