hai câu này ở trong ioe giúp mk ik vòng 25 lớp 2 giúp mk ik

ai giúp mk cho 5 tick

Have you got a .........
How many ... have you got ?

156 NGƯỜI

\(\sqrt{\left(4+\sqrt{7}\right).\left(4-\right)\sqrt{7}}=\sqrt{4^2-\sqrt{7^2}}=\sqrt{16-7}=3\)

- Nếu n là số chẵn thì n + 1 là số chẵn => 3n + 4 là số lẻ.

- Nếu n là số lẻ thì 3n + 4 là số chẵn => n + 1 là số lẻ.

Vậy, n + 1 là 3n + 4 là hai số nguyên tố cùng nhau.

5+5+5+5-6=5*4+6=26

Con gà nặng 1,5 kg

con ngan nặng 7 kg

con ngỗng nặng 40 kg

con voi nặng 1200 kg

bao gạo năng 1 yến

V. Insert the correct form of the words in brackets:

41. He is sure to have an accident because he drives very carelessly (care)

42. When Mrs Lien was young, she wanted to be an activities actress (act)

43. Ask a typist to type your application form for you (type)

44. Do you like traditional music? (tradition)

45. Videos are also very useful in education (educate)

46. Mr. Bean has a very painful tooth. (pain)

47. It is very dangerous to drive a car fast in a busy street. (danger)

48. Mary looked unhappy because her mother died. (happy)

49. When I go to the library, I sit and reach about wonderful things. (wonder)

50. Edison invented the electric bulb. (invention)

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