\(\dfrac{10^{2003}+8}{9}=\dfrac{9^{2003}+1+8}{9}=\dfrac{9^{2003}+9}{9}=9^{2003}\)

Mình giải ý b bài 1:

\(\dfrac{\dfrac{5}{47}+\dfrac{5}{37}-\dfrac{5}{17}+\dfrac{5}{27}}{\dfrac{75}{47}+\dfrac{75}{27}-\dfrac{75}{17}+\dfrac{75}{37}}\)=\(\dfrac{5\left(\dfrac{1}{47}+\dfrac{1}{37}-\dfrac{1}{17}+\dfrac{1}{27}\right)}{75\left(\dfrac{1}{47}+\dfrac{1}{27}-\dfrac{1}{17}+\dfrac{1}{37}\right)}\)=\(\dfrac{5}{75}=\dfrac{1}{15}\)

Read the following passage and mark the letter A, B, C, or D to indicate the best option for each of the blanks.

Our classes take place for three hours every morning from Monday to Friday. The (23)_________ class size is twelve and the average is ten. We use modern methods (24)_________ teaching and learning, and the school has a language laboratory, a video camera and recorders. You will only be successful in improving your English; however, if you work hard and practise speaking English as much as you can. You will take a short (25)_________ in English as soon as you arrive. In this way, we can put you in a (26)_________ at the most suitable level.

The emphasis is on oral communication practice in a wide (27)_________ of situations at the advanced knowledge. You will learn how to use language correctly and appropriately when you talk to native speakers. In addition, you will develop such study skills as reading efficiently, writing articles and reports, and note-taking from books and lectures.

Điền vào ô trống 27

A. variety 

B. amount 

C. number 

D. lot 

Rễ chùm

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