37. Eating a lot of fruit and vegetables is very good for your health.
→ It’s very __________________________________________________________
38. How about organizing a craft fair for our school?
→ Why don’t __________________________________________________________
39. It took David two hours a day to play computer games.
→ David spent __________________________________________________________
40. The students like playing outdoors better than studying in class.
→ The students prefer ________________________________________________________.
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A = 1 + 2 + 3 +... + 10000
Dãy số trên là dãy số cách đều với khoảng cách là: 2 - 1= 1
Số số hạng của dãy số trên là: (10000 - 1):1 + 1 = 10000 (số)
A = (10000 + 1)x 10000 : 2
A = 50005000

(1/3 - 2x)¹⁰² + (3y - x)¹⁰⁴ = 0
⇒ 1/3 - 2x = 0 và 3y - x = 0
*) 1/3 - 2x = 0
2x = 1/3
x = 1/3 : 2
x = 1/6
*) 3y - x = 0
3y - 1/6 = 0
3y = 1/6
y = 1/6 : 3
y = 1/18
Vậy x = 1/6; y = 1/18

A = (42010 + 22014) ⋮ 10
42010 = (42)1005
42010 = \(\overline{...6}\)1005 = \(\overline{..6}\) (1)
22014 = (2503)4.22 = \(\overline{..6}\)4.4
22014 = \(\overline{..6}\).4 = \(\overline{..4}\) (2)
Cộng vế với vế của biểu thức (1) và (2) ta có:
A = 42010 + 22014 = \(\overline{..6}\) + \(\overline{..4}\) = \(\overline{..0}\) ⋮ 10 (đpcm)
37.It's very healthy to eat a lot of fruit and vegetables.
38.Why don't we organize a craft fair for our school?
39.David spent 2 hours to play computer games a day.
40.The student prefer to play outdoors instead of study in class.
HOK TỐT~~
NHỚ TICK NHA!
37. Eating a lot of fruit and vegetables is very good for your health.
→ It’s very _______good for your health to eat a lot of fruit and vegetables___________________________________________________
38. How about organizing a craft fair for our school?
→ Why don’t _________we organize a craft fair for our school? _________________________________________________
39. It took David two hours a day to play computer games.
→ David spent __________two hours a day playing computer games________________________________________________
40. The students like playing outdoors better than studying in class.
→ The students prefer ____________playing outdoors to studying in class____________________________________________.