Câu D nha bạn.

=50004cm2 (k cho mik nhé)

5m2 4m2=9m2

66587,4 kg = 665,874
cho mik nha

M = 1 + (-2 + 3 ) + ( -4 + 5 ) + . . . + (-2000 + 2001) + (-2002) + 2003)

M = 1 + 1+ 1+ . . . + 1 + 1

Dãy số này có 2003 số hạng và có 1001 cặp số có tổng bằng nhau

1001.1+1 = 1002 nên M = 1002

610 nhé

1. How long have you waited for me ?

2. This is the second time I have watched this comedy with my boyfriend

3. I haven't heard from you for ages

4. My boyfriend is the most galant man I have known

5. I have waited for him since 2 p.m

6. He hasn't eaten this kind of food before

7. She is the most warm-hearted woman I have met

8. Have you finished the test yet?

9. I have known him for ages because we were neighbors when I was a child

10. She has teached me English for 3 years

Bài 4: Chia động từ trong ngoặc

1. How long  you(wait) for me?

2. This is the second time I (watch) this comedy with my boyfriend.

3. I (not hear) from you for ages.

4. My boyfriend is the most galant man I (know).

5. I (wait) for him since 2 p.m.

6. He (not eat) this kind of food before.

7. She is the most warm-hearted woman I (meet).

8. You (finish) the test yet?

9. I (know) him for ages because we were neighbors when I was a child.

10. She (teach) me English for 3 years.

Giúp tôi bài tập

375-(-39)=414'C nhé

5700 nhé

TL:

4 x 3 x 25 x 19 

= (4 x 25) x 3 x 19

= 100 x 3 x 19

= 5700

HT