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Tìm a,b biết a - b = 7 và BCNN(a,b) = 140
tính tổng a, S1 = 1+2+3+...+999 b, S2 = 10+12+14+...+2010 c, S3 = 21+23+25+...+1001 d, S4 = 24+25+26+...+125+126 e, S5 = 1+4+7+...+79 f, S7 = 15+17+19+21+...+151+153+155 g, S8 = 15+25+35+...+115
Giúp mình mai mình phải nộp rồi
Tìm 2 STN a,b > 0, biết a + b = 128 và UCLN(a,b) = 16
Câu 2: Hai xe ô tô khởi hành đồng thời tại 2 địa điểm A và B cách nhau 80 km. Nếu đi cùng chiều về C ( nằm ngoài B) thì sau 1 h 40 phút hai xe cách nhau 120 km. Nếu đi ngược chiều thì sau 30 phút hai xe cách nhau 20 km. Tính vận tốc của hai xe.
Đề bài: trình bày cảm nhận của em về biện pháp nghệ thuật sử dụng trong nhưng câu thơ sau: a. Nắng đứng ngủ quên Trên những bức tường Làn gió nào về mang hương Ủ đầy những rãnh tường chưa trát vữa” ( Về ngôi nhà đang xây,, Đồng Xuân Lan)
jane has been sleeping for almost 11 hours.don't you think we shoild wake her............................? A.up B.on C.to D.down
I. Circle the word in each group which is different. 1. A. table B. Photo C. picture D. newspaper 2. A. fridge B. washing machine C. book D. cooker 3. A. behind B. Until C. under D. next to 4. A. third B. Second C. five D. first 5. A. tomorrow B. Sunday C. Monday D. Tuesday II. Choose the best answer A, B, C or D. ( 3pts). 6. “………….do you live?”- I live in Hanoi. A. where B. what C.how. D. why 7. How old………you? A. how B. is C. are. D. am 8. “……………is this?” It’s a pen. A. Where B. What C. How. D. Which 9. ………………people are there in your family? A. What B. Where C. How many D. How far 10. Mai often………….. for picnic on the weekend. A. goes B. go C. are going D. is going 11. Look! The girls are ……….. rope in the playground. A. dancing B. skipping C. playing D. doing 12. Mai is good ………….. English and math , but she doesn’t like literature. A. at B. in C. on D. for 13. We usually …….. football in the winter A. do B. make C. does D. play 14. Would you like ……… milk? A. drink B. drinking C. to drink D. drank 15. Hoa often ………. her bike to visit his hometown. A. drives B. rides C. flies D. goes III. Complete the following passage with the suggested letters. (2pts) Herry likes fishing. He fishes in the (16) r____________ near our house. On Sunday afternoon, when he has no (17) w______________, he goes down to the river with a little water and some sandwiches and fishes until it is quite dark. (18)T____________ are always a few other people there. They love fishing too, and they all sit there quietly for (19) h______________. Sometimes they catch some fish, sometimes they do not. I do not like that kind of sport (20) b______________ I am not very patient. IV. Read the passage and answer the questions. ( 2pts) Hoa usually gets up at six o’ clock. Then she takes a shower. After taking a shower she has breakfast. She goes to school at about a quarter to seven. Her class starts at seven and ends at half past eleven. She comes back home at eleven forty five. 21. What is her name? - _____________________________________________. 22. What time does Hoa get up? - _____________________________________________. 23. What does she do after taking a shower? - _____________________________________________. 24. What time does her class start? - _____________________________________________. 25. Does she come back home at 11.30? - _____________________________________________. V. Rewrite the following sentences using the given words. (2pts) 26. My sister often walks to the supermarket. => My sister often goes …………………………………………… 27. Does your class have fifty students? => Are ……………………………………………………………… ? 28. Mrs. Hoa goes to work at six forty-five. => Mrs. Hoa goes to work at a ……………………………………… 29. He is in the bath at the moment. => He is …………… a ……………………………………………… 30. What is the price of the tickets ? => How much ……………………………………………………… ? ...................................................
Tìm a,b biết a/b = 4/5 và BCNN(a,b) =140
Trong phong trào kế hoạch nhỏ đợt I, ba lớp 7 thu nhặt được 254 kg giấy vụn. Lớp 7A có 40 học sinh, lớp 7B có 42 học sinh, lớp 7C có 45 học sinh. Hỏi mỗi lớp thu gom được bao nhiêu kg giấy vụn, biết rằng số giấy vụn của mỗi lớp tỉ lệ với số học sinh.
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