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Rút gọn các biểu thức sau : ( Ko tính cụ thể nha ) a, 3^7 . 27^5 . 81^5 b, 2^3 . 3^2 - 4^2 . 3 c, (-2)^3 . 13 - 15 . (-2)^3 d. 99 . 2^5 +2^3 . 2^2 e, 5.2^2 . 2^3 - 4.(5^8 : 5^6)
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2. Complete the second sentence so that it means the same as the first. Use the word in brackets. You do not need to change the word. Write NO MORE THAN THREE words. Here is an example. 0. The bookshop is opposite the library. _________________________ a bookshop opposite the library. (THERE) Answer: 0. There is 1. It’s a good idea to bring an umbrella with you. (SHOULD) You _______________________ an umbrella with you. 2. The gardeners take care of the plants in the palace. (TAKEN) The plants in the palace _______________________ of by the gardeners. 3. You will need to bring warm coats because it will get cold. (BETTER) You _______________________ warm coats because it will get cold. 4. The tower lies in the centre of the city. (LOCATED) The tower _______________________ the centre of the city. 5. In 1010, Ly Thai To chose Thang Long to be the capital of Viet Nam. (WAS) In 1010, Thang Long _______________________ Ly Thai To to be the capital of Viet Nam. -- The end --

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