$12-12+11+10-9+8-7+5-4+3+2-1$
$=12+(-12)+11+10+(-9)+8+(-7)+5+(-4)+3+2+(-1)$
$=[12+(-12)]+[10+(-9)]+[8+(-7)]+[5+(-4)]+[2+(-1)]+11+3$
$=0+1+1+1+1+11+3$
$=18$
$=(12-12)+(10+11)+(-9+8)+(-7+5)+(-4+3)+(2-1)$
$=0+21+(-1)+(-2)+(-1)+1 $
một mảnh vườn hình thang lần lượt hai đất là 9m,7m và chiều và chiều cao là 5,5m.Tính diện tích mảnh vườn. Tớ đang cần gấp
Exercise 1: Supply the correct VERB TENSE: 1. The coffee was all right, but the cream (be)…………………..sour. 2. He has a piano and a violin, but he (not have)………….a flute. 3. He says that he (arrive)……………..on time tomorrow. 4. She said that she (arrive)…………..on time yesterday. 5. I think that Victor (be)……………late. 6. He said that he (graduate)……………….from university in 1991. 7. We thought they (move)……………to California. 8. The teacher said that water (consist) …………………. of hydrogen and oxygen. 9. I (be)……….there when you arrive. 10. They were still waiting when I ( get)……………..there. 11. He has worked very hard since he ( be)………………here. 12. We have just come in when you (call)………….. 13. We’ll have already gone before you (get )……………back. 14. We decided to go home because it ( be )…………….very late. 15. We have been very busy while they ( be)…………..here.
tam giác ABC vuông ở A , đường cao AH .kẻ HD vuông góc với AB và HE Vuông góc với AC ( D thuộc AB , E thuộc AC ) . gọi O là giao điểm của AH và DE 1: chứng minh AH =DE 2: gọi P và Q lần lượt là trung điểm của BH và CH . chứng minh tứ giác DEQP là hình thang vuông a: chứng minh O Là trực tâm tam giác ABQ b: chứng minh Sabc = 2 S deqp
Exercise 1: Put the following verbs into three groups: /id/: /t/: /d/: wanted, played, helped, fitted, liked, watched, visited, looked, needed, remembered, stopped, talked, rented, missed, studied, started, used, learned (v), necked, changed, stayed, learned (adj), rugged
Cô giáo có 47 quyển vở , cô thưởng các bạn hạng nhất 7 quyển vở , còn lại thưởng đều cho 8 bạn hạng nhì. Hỏi mỗi bạn hạng nhì có bao nhiêu quyển vở
Hãy viết một đoạn văn ngắn (khoảng 300 từ) nói về ý nghĩa của việc đọc sách đối với bản thân em
Mọi người lm hộ mk câu này vse ai mk đg cần gấp lắm thask
xac dinh ctpt cho moi chat theo so lieu 51,3%C; 9,4%H; 12%N; 27,3%O; ty khoi hoi so voi khong khi la 4,035
Mong mọi người giúp e với ạ (1-16)🥺🙏
I.Choose the best one : 1. It’s cold. Don’t go out _________________ your coat. with without in within 2. She hasn’t finished the letter _________________. already just yet never 3. Would you mind _________________ I borrowed your laptop for a while? when if how what 4. My grandfather uses a pair of glasses _________________ he can see everything clearly. in order to so as to to in order that 5. Their friends want to travel ________________ train to visit them in Britain. with by on in 6. Oh, no. I haven’t connected it __________________. properly suitably helpfully usefully 7. The area surrounding the _________________, Angkor Thom, used to be the royal capital city. temple pagoda church park 8. Would you like to go to the band concert? Thanks, but I ___________________. saw it yet have seen it already have seen it yet already saw it 9. Chicago is _________________ right on the shore of Lake Michigan. placed situated laid set 11.I’m afraid. I’ve lost my key again. -Not again. You………………………………… your key. Always lose have always lost are always losing were always losing 12. What…………………………..you……………………………at 9 pm last night ? did/do are/doin have/done were/doing 13/When I …………………………… home yesterday, my parents ………………………..TV. Get/ are watching got/watched got/were watching have got/ watched 14/It’s ……………………………..to stay here this summer vacation. wonder wonders wonderful wonderland 15/ …………………………………..you phoned me, it was my lunchtime. When While Because For 16/Lan …………….talking in class. She ‘s a talkative girl. keeps kept is was 17/There is a………………………………… flight at 10am daily date days day 18/The shopkeeper ………………………………. the shop was closing in half an hour. says said tells told 19/My daughter likes playing ………………….. in free time. the piano the games the badminton the music 20/Please contact Mr Hai …………………………..more information. to for with at FORM OF WORDS 1.That was an ___________________ trip. ( excite) 2. Some _________________ of WHO are talking to the students of Ban Co school. ( represent) 3. Many wants to visit an _______________ Institute in VN ( ocean( 4. There are many_____________________ village in Sapa. ( tribe) 5.I often send my close friends_________________ cards. ( greet) 6. There were three__________________ in the rice –cooking festivals. 7. Her ______________ made a deep impression on all of us . ( perform) 8. __________________ , the story turned out to be true. ( surprise) 9.My room is_______________________ on the top floor of the house. ( situation) 10. He was sent to______________________.for five yeas. ( impresonable) 11. Mr Brown looks______________________ beautiful in her wedding dress. ( magnificent) 12. Fights should be confirmed 48 hours before_________________ ( depart) REWRITE SENTENCES 1/ Mary has never come to VN before. This is the first time ………………………………………………………………………… 2/ I have never met your family before. This is the first time…………………………………………………………………………… 3/ They water the flowers very morning. The flowers……………………………………………………………………………… 4/ Viet Nam exports rice to many countries. Rice ………………………………………………………………………………………. 5/ We last saw your son three days ago. We haven’t …………………………………………………………………………………… 6/ They built this church in the 18 th century. This church …………………………………………………………………………………… 7/ Clarke Moore wrote this poem in 1823. This poem …………………………………………………………………………………… 8/ I’ll invite some of my old friends to the party. Some of my old friends……………………………………………………………………… 9/ “You must finish your work before 7pm” The man said to her ………………………………………………………………………… 10/ She said to me “ Your Dad will come here in half an hour.” She said to me…………………………………………………………………………… 11/ When you phoned me, it was my lunchtime. When………………………………………………………………………………………… 12/ During dinner, the telephone rang. While ………………………………………………………………………………………… 13/ He continues to forget his homework. He is………………………………………………………………………………………… 14/Lan keeps talking in class. Lan……………………………………………………………………………………………
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