1, B

2, D

3, A

a, Dấu hiệu: Điểm kiểm tra 45 phút môn Toán của học sinh lớp 7A

Số các giá trị: 30

b, Bảng tần số:

c, Tổng các tích x.n là:

1.1+2.2+3.1+4.2+5.5+6.4+7.4+8.5+9.4+10.2

=1+4+3+8+25+24+28+40+36+20

=189

Số trung bình cộng là \(\overline{X}\)= \(\dfrac{189}{30}\)=6,3

dùng từ gợi ý để viết thành câu hoàn chỉnh

1. Remember/wash/hands/before/after/meals/.

2. Could/tell/how/get/railway station/please/?/.

3. Trang/the/good/student/our class/.

4. Traveling/train/slower/but/interesting/traveling/plane/.

5. Thomas Edison,/famous /American/inventor,/born/1847/died/1931

điền giới từ thích hợp

1. Lan is sitting..........to her parents in the movie theater

2. Which subject are you good...........? - chemistry

3. There is a great difference............these two things

4. Shall we travel...........your car or mine?

5. Pauline got married............18 May 1992

tìm 1 lỗi sai và sửa lại 

1. My mother drinks fewer coffee than my father

2. Many people don't like living in the city because of its noisy

3.Mr.Huy, together with his friends, are going to the party tonight

4.It is difficult for us trying to stay away from water

5.Hoa told me that her aunt cutted her hair yesterday

cho dạng đúng của từ

1. He looks very.......He plays sports so much          SPORT

2. The teacher was...........with the good result of our final exam              PLEASE

3. It's..........in England to eat Turkey on christmas day                TRADITION

4. We hate him because of his..........to the children         KIND

5. I took the aspirin headache...........            APPEAR

6. London is............for Big Ben clock tower         FAME

7. We had a happy............together               CHILD

8. We learn to repair............appliances in electronics class      HOUSE

9. Do you know that video games may be.............                ADDICT

10. Today, the weather is fine and...............           SUN

chia dạng đúng của từ trong ngoặc

1. Look! The bus(come). I(not want) to miss it

2. How many cigarettes you(smoke) a day?

3. I spend my free time(read) books everyday

4. When I entered his room, I(see) him(sleep) on an armchair

5. What he(say) last night(be) true

6. Why you(not come) to my house for dinner?

7. He is very happy(meet) his old friends