Rút gọn phân số

$\frac{608}{126000}$

19999+12345=

Thực hiện phép tính $\left(\frac{1}{3}+\frac{1}{6}\right)\times \frac{2}{4}$

Thực hiện phép tính: $\frac{3}{22}\times \frac{3}{11}\times 22$

x² + 4x - 5
Phân tích thành nhân tử

Cho hình thang vuông ABCD, đáy bé AB =$\frac{2}{3}$ đáy lớn CD và dài bằng 12 cm,cạnh AD dài 5 cm.
a) Tính diện tích hình thang ABCD
b) Kéo dài hai cạnh DA và CB cắt nhau tại điểm E. Tính độ dài đoạn thẳng AE.

Số sánh $5^{38} \mathrm{và} 4^{57}$

trong không gian Oxyz cho đường thẳng d: $\frac{x-1}{2}$=$\frac{y=1}{3}=\frac{z}{2} .$ Điểm nào trong các điểm đây thuộc đường thẳng d?

A.  P(5;2;4) 

B. N(1;-1;2)

C. M(1;0;0)

D. Q(3;2;2)

II. Put the verbs in brackets into the correct form or tense (8 points)

31. Children like (take) __ to the zoo every weekend.

32. We find (arrange) __ flowers interesting because it helps us relax.

33. I (see) __ a film this Sunday evening. Will you go with me?

34.She was about (leave) __ the office when the phone rang.                       

35.We (be) __ students in four years.

36. Ten kilometers (be) __ too long for us to walk there.We should take a taxi.

37. My parents made me (study) __ hard last night.

38.There was a swimming pool here. We (go) __ swimming every day.

III. Give the correct form of the word in brackets. (7 pts)

39. The film was____ though they spent millions of dollars making it. (SUCCEED)

40.Ba left home early. ______, his bike was broken mid-way.             (LUCK)

41.You should read books to_______ your knowledge.                       (RICH)

42. Librarians spend a lot of time _______books                                 (CLASS)

43.During the war there was a great _______of sugar, coffee and other goods. (SHORT)

44. The Saigon Zoo and Botanical Garden in HCM city received many _____of meat, fruits and vegetables to help take care of the animals during the COVID-19 outbreak.    

                                                                                                                            (DONATE)

45.After taking an aspirin, her headache......................last night   (APPEAR)

IV. Find and correct one mistake in each sentence (5 pts)

46. At recess, the students practice to play basketball.

      A               B                      C          D

47. She will tell him your message as soon as he came back

                      A                  B               C                D

48. Each of you have a share in the work.

         A                B       C      D

49.The public library in the city has thousand of good books.

                                   A               B       C                       D

50. Ba is in class 7A and he enjoys the school very much

           A                     B                    C                  D

V.Write the correct preposition to fill in the blank (5 pts)

51. Could I help you ______________ your bag?

52. Na got up late this morning because her alarm clock didn’t go ___________ .

53. My mother often picks me ___________ from the school.

54.He always depends ___________other students.

55. In many ways you take ______________your mother.

BÀN VỀ ĐOẠN TRÍCH CHỊ EM THÚY KIỀU, CÓ Ý KIẾN CHO RẰNG:"CA NGỢI VẺ ĐẸP, TÀI NĂNG CỦA CON NGƯỜI VÀ DỰ CẢM VỀ KIẾP NGƯỜI TÀI BA BẠC MỆNH LÀ BIỂU TƯỢNG CỦA CẢM HỨNG NHÂN VĂN Ở NGUYỄN DU"

giải thích ý kiến trên

I.  Rewrite the sentences, beginning with given words so that their meanings stay the same. (5pts)

81.Although Tom was a poor student, he studied very well.

àIn spite of…………………………………………………………………………..

82. My sister finds it difficult to get up early in the morning

àMy sister isn’t used …………………………………….…....

83. How terrible the weather is!

àWhat...................................................................................

84. Did Peter finish the work before 5pm?

àPeter .................................................................................?

85.The subway can help solve traffic problems in this city.

àThe subway .................................................................................

II. Complete the second sentence so that it has a similar meaning to the first sentence, using the word in bold and other words to complete each sentence. Do not change the word in bold. (5 points)

86. I’m interested in the news about ancient towns.                             (find)

→………………………………………………………………………….

87. If the wound becomes infected, you'll need to take antibiotics.       (Should)

→……………………………………………………………………….......

88. Tim does his homework alone.                                                      (by)

→……………………………………………………………………….......

89. It isn’t necessary for students to wear uniforms on Wednesday.      (need)       

→ Students ___________________________________________________.

90. I don’t wash my own clothes any more.                                         (used)               

→ I ___________________________________________________.

anh chị giúp em với ạ em xin cảm ơn rất nhiều

em có đồng tình với ý kiến 'tinh thần đoàn kết chỉ cần khi có chiến tranh còn thời bình thì không

Phân tích đã thức sau thành nhân tử
3x² - 12x

$\mathrm{B}=3-\frac{1}{5}\times 3-\frac{2}{5}\times 3-\frac{3}{5}\times 3-\frac{9}{5}$

$\frac{5}{7}\times \frac{1}{3}-\frac{5}{7}\times \frac{1}{4}-\frac{5}{7}\times \frac{1}{2}$

Cho phương trình x² – 6x + m = 0 (với m là tham số).

Tìm m để phương trình đã cho có nghiệm kép và tìm nghiệm kép đó.

2) Cho x¹ và x² là hai nghiệm của phương trình x² – 3x – 2 = 0.

Tính giá trị của biểu thức P = ${x_1}^2+{x_2}^2$

So sánh phân số $\frac{77}{66}\mathrm{và} \frac{16}{12}$