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letuankietpvd
2 năm trước
giúp mik với tính B=3+3 trên 1+2+3 trên 1+2+3+3 trên 1+2+3+4+......+3 trên 1+2....+100 giải thik chi tiết từng bước giải mik cảm ơn cho mik hỏi là cần gì lấy tử nhân với 1 rồi đặt thừa số trung ra ngoài làm j làm kiểu này đc ko 3+3/1+2+3/1+2+3+4+......+3/1+2+....+100 ta thấy 3/1+2=3/(1+2).2;2=6/6 mà 6/6=6/2.3 3/1+2+3=3(1+3).3=6/12=6/3.4 ..........3/1+2+......+100=3/(1+100).100:2=6/100.101 cho mik hỏi là cách này đúng hay sai ạ nếu sai thì các bạn sửa lại giúp mik và cho mik hỏi tại sao lấy các tử nhân 1 làm j và đặt thừa số chug làm j ai giải thik chi tiết nhất mik vote 5 sao cảm ơn
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* Supply the correct forms and tenses of these verbs: 1. He often (go)................... to school on foot. 2. It (rain)............................ very hard now. 3. The sun (warm)........................... the air and (give).................. us light. 4. Look! A man (run)...................... after the train. 5. She (go).................... to school everyday. 6. Bad students never (work)..............................hard. 7. It often (rain)............... in the summer. It (rain)........................ now. 8. The teacher always (point)............ at the black-board when he (want).................. to explain something. 9. Mother (cook).......... some food in the kitchen at the moment, she always (cook)............ in the morning. 10. I always (meet)................ him on the corner of this street. 11. Where you (go).................... now? - I (go)....................... to the theater. 12. He (not do).............................. morning exersices regularly. 13. He (do)..............................morning exersices now? 14. Water (boil)............................at 100 defrees centigrade. 15. He (meet)........................ the dentist next week.

Mình rất thích chơi trò chơi bán hàng, trong đó thích nhất là cần hàng để bán cho khách .Một hôm, tự dưng mình mơ thấy một ông tiên râu tóc bạc phơ hiện lên bảo:Ông sẽ tặng con một cái cân đĩa có hai cái đĩa ở hai bên,một bên con để các quả cân và một bên con để những thứ gì cần cân.Ông cũng cho con 5 quả cân và chỉ bằng 5 quả cân này ,con có thể cần biết chính xác những gì nặng n gam với n là số tự nhiên từ 1 đến 31 .Nhìn chiếc cân xinh xắn cùng với 5 quả cân, mình thích quá reo lên :"Tuyệt vời quá Cháu cảm ơn ông",rồi bừng tỉnh dậy. Tất nhiên không có chiếc cân nào và quả cân nào nằm trên giường của mình, nhưng mình cứ băn khoăn mãi "Với năm quả cân, mỗi quả phải nặng bao nhiêu để cân được như điều ông tiên nói?".Giúp mình với.

*Supply the correct form of these verbs: 1. Hoa (like) volleyball. She often (play)________volleyball with her friends. They (play)___________- it three times a week. They (play)________ volleyball in their school yard now. 2. What your father (do)_________ in his free time?-He (listen)________ to music or (read)__________ a newspaper. 3. Where (be)______ Mai? -She (be)_____ in the kitchen. She (cook)__________ lunch for her family. 4. Which sports your brothers (play)________? -They (swim)_________. They (swim)_______ in the swimming pool now. 5. He (never/ go)_________ camping because he (not/ have)___________ a tent. 6. Lan and Nga (see)__________ a movie tonight. 7. What your vacation plans (be)________? - I (spend)__________ 2 weeks on a Greek island. 8. That film (come)___________ to the local cinema next week. You (want)___________ to see it? * Supply the correct forms and tenses of these verbs: 1. You can (park)__________ here because this sign says "Parking". 2. Mary (not/ work)____________ today because it's Sunday. 3. Where you (go)____________? - I (go)___________ to the zoo. 4. What you (do)_______ this summer holiday? - We (visit)__________ President Ho Chi Minh's mausoleum. 5. My brother (drive)___________ his car into the garage at the moment. 6. You mustn't (eat)___________ food in the classroom. 7. Let's (help)_________ mom, Lan. She (clean)_________ the floor. 8. Look! The plane (fly)__________ towards the airport. It (land)____________. 9. Why we (not/ go)___________ to Ha Long Bay this summer? 10. Where are you, Nam?- I (read) in my room. 11. There (be)___________ any vegetables in he kitchen? 12. My parents (not/ go)____________to work on Saturdays and Sundays. 13. Lan and Hoa are (play)______________tennis in the yard. 14. Our teacher often (have)______________lunch at school. 15. She (be)___________ten years old. * Complete the passage with the correct form of the verbs in brackets Mr. Ba (1. be)_________ my teacher. He (1. teach)________ me English. He (3. go)_________ to work by car. His class (4. start)_______ at 7.30 and (5. end)_________ at 11. He (6. have)_______ lunch at school. In the evening, he (7. watch)_____ TV or (8. read)__________ newspapers. He (9. work)____________ late and (10. go)__________ to bed at about 11.00. *Correct the tense and form of the verbs Son (be)..... from Vietnam. He (speak)...........Vietnamese. He can (speak)...... English, too. He (live)......with his family in Ho Chi Minh City. He often (go) ........... to school on Sundays to practice his English. Tomorrow (be)....... Sunday. He (walk)...... to school tomorrow. Now he (read).......... a book. *Give the correct form of the verb in brackets. 1. Trang usually (listen).......... to the teacher in class, but she (not listen)..........now; she (look)............ out of the window. 2. Where is your father? - He (be)........ in the bathroom. He (brush)............ his teeth. He (brush)............. his teeth in the morning and evening. 3. Your children (go).............. to school by bus every day? 4. There (be)............. many flowers in your garden? 5. Every day Mr Hung (not drive)........... to work. He (travel).................... to work by bike. *Give the correct form of the verb in brackets. It is 7.30 a.m and the Browns ...(1. be) in the kitchen. Mrs. Brown ... (2. sit) at the breakfast table. She ... (3. read) the morning paper. Mr. Brown ... (4. pour) a cup of coffee. He ... (5. drink) tow cups of coffee every morning before he ... (6. go) to work. There is the cartoon on TV, but the children are not watching it. They ... (7. play) with the toys. They usually ... (8.watch) cartoons in the morning, but this morning they ... (9.not pay) any attention to the TV. Of course. Mr. and Mrs. Brown are not watching TV either. They ... (10. like) watching cartoons. *Give the correct form of the verb in brackets. John is twenty six years old. He (1.live)__________ with his family in an apartment in Hanoi. There (2.be)________ four people in his family. His father is a worker. His mother is a worker. They (3. work)__________ in a factory. His sister is a student at university. John (4. work)_________ as a travel writer for a newspaper. He (5. go)_______ abroad about ten times a year. Now, he (6. travel)________ in England. He (7. speak)__________ English very well, but he (8. study)________ Spanish at the moment because he (9. need)_________ to go to South America. Every evening he (10. write)________ notes about people and places around the world.

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