Một thửa ruộng hình thang có đáy lớn là 20m, đáy nhỏ bằng 4/5 đáy lớn và lớn hơn chiều cao là 10 m. Trung bình cứ 100 m2 thu hoạch được 60kg thóc. Thửa ruộng đó người ta thu hoạch được số tạ thóc là: A. 64,8 tạ B. 6,48 tạ C. 0,648 tạ D. 0,0648 tạ ................................................................................................................................ Bài 10: Một hình thang có đáy nhỏ 19cm và bằng 1/2 đáy lớn. Nếu mở rộng đáy lớn thêm 4,5cm thì diện tích tăng thêm 27 cm2. Vậy diện tích hình thang ban đầu là: A. 342cm2 B. 34,2 cm2 C. 68,4 cm2 D. 684 cm2 (Lưu ý: Để giải được bài toán các em nên vẽ hình ra nháp) ................................................................................................................................ ................................................................................................................................ ................................................................................................................................ ................................................................................................................................ ai làm đc mik lich luôn

Các câu hỏi liên quan

IV. Complete the sentences, using although, despite, in spite of, however, or nevertheless. Sometimes, two answers are possible. 1. difficulties, the firemen managed to save many people who were caught in the fire. 2. he got top marks at high school, he never went to university. 3. She failed the test she studied hard. 4. Everyone thought she would accept the offer. , she turned it down. 5. We enjoyed our holiday the rain. V. Rewrite the sentences, using the words in the brackets. Change other words in the sentence if necessary. 1.The new restaurant looks good. It seems to have few customers. (however) 2.We had planned to walk right round the lake. The heavy rain made this impossible. (although) 3.Mary was sick. She didn’t leave the meeting until it ended. (despite) VI. Complete the sentences with the words in the box. action animated comedy horror western musical romance film science-fiction drama 1. We are going to the cinema to see a . 2. A is a play in a theatre or on television or radio, or plays and acting generally. 3. There are always cowboys in a . 4. I love films. They’re very exciting. 5. Have you ever seen this ? It’s really funny. 6. Dracula is the best film I’ve ever seen. 7. My favourite films have beings from Mars. 8. I watched this last week. The singing and dancing are great. 9. The Lion King is an excellent film. I love cartoons. 10. He falls in love with I.Find the word which has a different sound in the part underlined. a pretty girl. It’s a beautiful . 1. A. picked B. clicked C. promised D. delivered 2. A. wanted B. developed C. needed D. included 3. A. jumped B. loved C. washed D. liked 4. A. actor B. acting C. address D. action 5. A. long B. boring C. shocked D. comedy II. Find which word does not belong to each group. 1. A. interesting B. exhausting C. tired D. exciting 2. A. actor B. comedy C. director D. editor 3. A. entertaining B. exciting C. shocking D. acting 4. A. despite B. in spite of C. because of D. although 5. A. plot B. documentary C. horror D. thriller Mọi người giải giúp em với ạ !Em cảm ơn ạ