D = 2 - 4 - 6 + 8 + 10 - 12 - 14 + 16 + ... + 1994 - 1996 - 1998 + 2000

D = (2-4-6+8) + (10-12-14+16) + ... + (1994- 1996 -1998 +2000)

D = 0+0+...+ 0

D = 0

k mk nha bn

1. Do your friends like watching science programmes on VTV3 every Fridays?

2. What is the name of your hobby?

3. Among the school subject Lenka likes Literature and Music the best.

4. Sugar gives you energy and you feel less hungry.

5. What kind of food would you like for lunch?

#Học tốt