Tính giá trị của biểu thức A=\(1\dfrac{1}{2}\)x\(1\dfrac{1}{3}\)x\(1\dfrac{1}{4}\)x...x\(1\dfrac{1}{99}\)

Chứng minh rằng A= \(\dfrac{1}{2^2}\)+\(\dfrac{1}{3^2}\)+\(\dfrac{1}{4^2}\)+...+\(\dfrac{1}{10^2}\)<1

Ba người cùng làm một công việc. Nếu làm riêng, trong 1 giờ người thư nhất làm được \(\dfrac{1}{4}\) công việc, người thứ hai \(\dfrac{1}{5}\) công việc, người thứ ba \(\dfrac{1}{8}\) công việc

a) Trong 1 giờ, người nào làm việc nhiều hơn và bao nhiêu phần công việc ?

b) Trong 1 giờ, cả ba người làm được mấy phần công việc? 

VI. Change the following sentences into exclamtory senten, using 'What'

1. He is a very good student =>________________________________

2. The weather is so awful =>__________________________________

3. The city is very beautiful =>_________________________________

4. The building are sotall and big =>______________________________

5. The cake is so delicious =>___________________________________

6. The flowers are very lovely =>_________________________________

7. The coffee is so strong =>_____________________________________

8. The Maths lesson is so interesting =>_____________________________

IV. Complete the second sentence so that it has a similar meaning to the first one

1. How long have you played basketball

    When_____________________________

2. Shall we play badminton this weekend?

     How about___________________________

3. My brother is not so interested in basketball as I am

    I____________________________________________

III. Complete the sentences with the corrform of theword in brackets

1. He gets a lot of___________ from football. (enjoy)

2. My brother is not very__________. He doesn't like playing or watching spors.(sport)

3. Nearly half of the people in the world are_________ in football. (interest)

4. Tom and his parents areliving in this City and this is____________. (they)

5. Cristiano Ronaldo is a Portuguese professional____________. (football)

6. Pelé is a________________ hero in Brazil. (nation)

A bicycle is more convenient than a car in towns.

A car is____________________________________________________

Turn right at the first turning

Take ______________________________________________________

10

Complete the second sentences so that it has the same meaning to the first one

It's not good to spend a lot of time watching TV

You________________________________________________________________

Shall we go to times spendre to welcome the New Yea

Why don't___________________________________________________________