user-avatar
kieutrinh29
2 năm trước
Thu gọn các đơn thức sau: a) $-\frac{1}{3}x^2y.\frac{3}{2}xy^3$ b) $-5xy^4.(-0.2x^2y^2)$ c) $(-2x^2y).(5x^3y^3)$ d) $(-1\frac{1}{2}x^2y^3)^2$
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I. Make questions for underlined words. 1. My brother watches TV three hours a day. ………………………………………………………………………….. 2. The news programme often finishes at 8 o’clock. ………………………………………………………………………….. 3. The new TV is ten thousand million dong. ………………………………………………………………………….. 4. We go to the English club twice a week. ………………………………………………………………………….. 5. I was at home yesterday. ………………………………………………………………………….. 6. My mother usually gets to works by bus. ………………………………………………………………………….. 7. The game show lasted for 2 hours and a half. ………………………………………………………………………….. 8. We should place the new fridge in the kitchen. …………………………………………………………………………..

II. Find a mistake in the sentence and correct it. ( Tìm và sửa lỗi sai ) 1. Although the football game was over, but the fans stayed in their seats cheering. 2. What do you compare the time you spend watching TV to the time you spend on other activities? 3. Nam didn’t win the race because of he ran too slowly. 4. Tom wants to go oversea and he does not have enough money. 5. It was late although they continued doing their work. III. Fill in the blank with the correct word form. 1. People in my country are very warm and ……………. (friend) 2. She looks more ………….. than her sister. (beauty) 3. They were really ………….to survive from the shipwreck. (luck) 4. I love the …………..of summer evenings in the countryside. (peaceful) 5. Those dogs look …………. (love) IV. Rewrite these sentences using the given words without changing its meaning. 1. My brother’s favorite action movie is “ Fast and Furious”. (best) -> My brother ……………………………………………………………… 2. How many kilos of rice would you like? -> How many kilos of rice do …………..…………..…………..…………..…...? 3. Tom was tired, so he couldn’t go to the party. (because) -> Tom couldn’t …………………………………………………………… 4. No fish in the aquarium were more beautiful than the colorful life fish. (most) -> The colorful …………………………………………………………….. 5. There is beef and chicken in the menu. -> The menu …………..…………..…………..…………..…………..……….. 6. I like salad best .-> Salad is …………..…………..…… 7. I want some iced tea because I am hot.-> I am hot …………..…………..…… 8. Mr. Long wants a cold drink. -> Mr. Long would like …………..…………..…………..…………..………… V. Find and correct the mistakes 1. Last summer, my parents buyed me a new bike. A B C D 2. I ate noodles for dinner but I wasn’t eat anything for lunch. A B C D 3. Although the football game was over, but the fans stayed in their seats cheering. A B C D 4. What are you going to invite to your birthday party next week? – Mary and Jerry A B C D VI. Read the passage and answer the questions below. The year 2030 Hi! My name is Nam. In 2030, I will live in Vietnam, on the one hundred and fifty- second floor of a tall apartment building. It will have a shiny white surface on the outside to reflect the sunlight and to keep it cool. On the inside, I will have central air conditioning. The big screen for me to watch movies will also be a fish tank. When it is switched off, I can see my pet fish swimming happily in it. I will own a sky restaurant. My restaurant will be in mid air. My customers will take a special lift in a capsule to enter my restaurant. In 2030, Vietnam will still be a beautiful country. However, the grass and trees are unlike those today. They will be mostly in shades of yellow or brown. Life on this time will not appear too different from today, expect that the weather will become hotter. 1. Which floor of the apartment will Nam live? ..................................................................................................................... 2. Why will the building have a shiny white surface on the outside? .............................................................................................................. 3. What will Nam have on the inside? ............................................................................................................ 4. How will customers enter Nam’s restaurant? ...................................................................................................................... 5. What will grass and trees in 2030 be like? ................................................................................................................................ VII. Complete the passage with the words given in the box exciting What about energetic never with often have can portable take John: What do American students (1)________ do at recess, Kate? Kate: They often (2)_________ part in different activities. Some (3)________ students play basketball. John: Do they (4)________ enough time? Kate: No. They (5)________ have time to play the whole game. They just practice scoring goals. John: (6)________ other students? Kate: They read, study, eat or drink, talk (7)________ friends and listen to music. John: Listen to music? How (8)________ they do? Kate: Well, they usually have (9)________ CD player with small earphones. John: Oh. What (10)________ r

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team