1.tính nhanh a,16.55+55.84 b,52.99+52 c,43.17+29.57+13.43+57 D,35.34+35.86+65.75+65.45 E,189+123-89-23 G,101.25-101.11-101.14 .là dấu nhân nha m.n M.n giúp mik với mik đang cần gấp ạ

27. Farmers ( grow) rice in Asia

28. Why You (hate) mice so much?

29. When you (go) to bed everyday?

30. Where Their brothers often (hold ) parties?

31. What you often (do) when you are tired?

32. How she (cook) this dish?

33. How they (study) English?

34. They (do) their homework everyday

35. We ( not want) to have a baby so much

36. They often ( not go) to the zoo

37. She always (not buy) too much food

38. the school (not begin) in December every year.

39. My mother (not come) to Ho Chi Minh city every month

40. Mary  (not draw) so well

41. She (not drive) her car to work

42. She (wish) she could fly

43. My parents often (forget) to close the door

44. Her boy friend (give) her flowers on her birthdays

45. The plant (grow) so well because they have taken care of it everyday.

46. They (know) that they will pass the exam

47. She (leave) her office at 6Pm everyday

48. They (meet) their child every weekend

49. She (read) books once a week

50. The sun (rise) at 5Am every morning

51. I always (send) an email to my mother at weekends

giúp mik với mik đang cần gấp ạ 

cảm ơn bn nhiều:))

liệt kê các phần tử sau:

a,A={ x  ∈ N/ 3< x <_ 15}

b,C={ x  ∈ N/7 <_ x < 17}

c,B={x  ∈ N/5 <_ x < 8}

d,D={x  ∈ N/14 <_ x <_ 19}

e,E={x  ∈ N*/  x < 7}

g,G={x  ∈ N*/ x<_ 4}

ghi chú:_ là dấu gạch ngang ở dưới dấu < 

các bạn giúp mik với,mik đang cần gấp ạ!!!!!