`a,3x^2y^3+x^2y^3`
`=(3+1).x^2y^3`
`=4x^2y^3`
`b,5x^2y-1/2x^2y`
`=(5-1/2).x^2y`
`=9/2x^2y`
`c,3/4xyz^2+1/2xyz^2-1/4xyz^2`
`=(3/4+1/2-1/4).xyz^2`
`=1.xyz^2`
`=xyz^2`
Đáp án + Giải thích các bước giải:
`3x^2y^3+x^2y^3=(3+1).x^2y^3=4x^2y^3`
`5x^2y-1/2x^2y=(5-1/2).x^2y=(10/2-1/2).x^2y=9/2x^2y`
`3/4xyz^2+1/2xyz^2-1/4xyz^2=(3/4+1/2-1/4).xyz^2=(3/4+2/4-1/4).xyz^2=xyz^2`
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2a. Image you are going on a journey touring some of the natural or man-made wonders in your area. Fill in the information in the table below 2b. Now write an itinerary...(Viết về lịch trình chuyến du lịch của bạn mà một vài cảnh quan thiên nhiên làm bạn thích thú (khoảng 100-200 từ). Có thể sử dụng gợi ý ở bài 2a và bài 3 phần đọc hiểu.)
17. No one can deny the positive benefits of using the Internet nowadays, but there are also ______________ effects. Can you give me some of its disadvantages? A. virtual B. negative C. harmfully D. strangeness 18. Your ______________ must be as short as possible, but makes sure that it includes all of main ideas of the full text. A. summarize B. summary C. summarizing D. summarily 19. What is the synonym of the word ‘measure’? A. concludsion B. proposal C. positiveness D. strangeness 20. I have used this antivirus software for more than a year. It’s time for me to ______________ it. A. summarize B. exist C. update D. take
Làm cho em bài 2 phần luyện tập trong SGK Tiếng Việt lớp 4 tập 2 trang 141 ạ! Em thích hình ảnh mưa nhất!Miêu tả 2 câu thoi! Mơn mng trc nè :p
Ai trả lời dc mình cho 5 soa ạ mình đang cần gấp,
10. I have checked your ______________. It’s good, and if you make it shorter, it will be more perfect. 12| Learning hard, living happily! Biên soạn và tổng hợp bởi Lê Công Đức YOUTUBE DUCLE ELT Subcribe to learn online! 11. Watching TV in a long period of time will affect your eyes and health ______________. It can cause harm to your eyesight and lead to obesity. 12. If you get more and more stressed, you will get ______________ easily because it’s very difficult for you to control your emotions. 13. We usually use these phrases ‘In short, In a nut shell, As I have noted ...’ to ______________ what we have mentioned in the body part of an essay. 14. Lack of doing exercise can be ______________ to our physical health because it makes us more passive and physically ill easily. 15. Can you tell me the positive and ______________ sides of using the Internet? Give me some specific examples to support your ideas in your essay. 16. The first ______________ I faced when studying in a new school is that everyone in this place are very kind, helpful, and friendly.
GIẢI GIÚP MIK VỚI PLS TỐI NI MIK NỘP RỒI
1. Facebook seems to be very ______________ to my father. He has never used it so far. However, he likes watching videos from my brother studying in the UK. 2. Smoking cigarettes does great ______________ our body, so adults usually ban teenagers from taking up this bad habit. 3. If you don’t want your computers (or laptops) to be attacked by hackers, you must ______________ the antivirus software you are using regularly. 4. Read the text and ______________ its main ideas, and then retell it to your classmates. I’ll let you ten minutes to do it. 5. The best ______________ to get out of the addiction of playing computer games and social networks (Facebook, Zalo...) is to participate in social activities, outdoor sports, or gathering with your friends more often. 6. When you surf Facebook, you seem to be more addicted and curious what is happening with your friends and others, so you only want to stay alone and sit all day in front of the computer. This can lead to some negative health problems such as ______________, obesity, stress, and despression. 7. An essay should include three main parts – the introduction, the body, and the ______________. Go to page 13 in your textbook for more information. 8. My sister is very shy when meeting ______________. I think she should socialize, hang out with friends, and join outdoor activities more. 9. Sitting in front of your computer playing games or surfing the Internet affects you physical health negatively. ______________, it also does harm to your psychology. Therefore,
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