Chọn từ gạch chân cần sửa lỗi trong câu ạ

:Tìm số có hai chữ số biết rằng tổng củng chúng bằng 10 và nếu thêm chữ số 0 vào giữa hai số đó thì ta được số mới lớn hơn số cũ 270 đơn vị.

Tui cần người chuyên toán giải giúp

Mình xin bổ sung thêm phần 3. Dịch vụ (điện thoại ko chụp đc hết)

Bài 2. a) Tìm tất cả các số có 2 chữ số là bội của 32; 16. b) Tìm tất cả các số có 2 chữ số là ước của 50; 45. Bài 4. Tìm số tự nhiên x, biết: a) 100 x ; 75 x và 3 < x < 60; b) 100 x và 240 x và x lớn nhất; c) x 12; x 8; x 10 và 200 < x < 400; d) x 15; x 25 và x < 400.

Câu 1: Cho 8 gam hỗn hợp X gồm Fe và Mg tác dụng vừa đủ với 5,6 lít khí Cl2 (đktc) thu được m gam hỗn hợp muối khan Y. Tính % khối lượng các kim loại trong hỗn hợp X ? Tính tổng khối lượng các muối trong Y?

When we were in England last year, I went fishing with my friend, Peter. Early in the morning we were sitting quietly by the side of the lake when we had an unpleasant surprise. We saw a duck come along with three ducklings padding cheerfully behind her. As we watched them, there was a sudden swirl in the water. We caught a glimpse of the vicious jaws of a pike – a fish which is rather like a freshwater shark – and one of the ducklings was dragged below the surface. This incident made Peter furious. He vowed to catch the pike. On three successive mornings we returned to the vicinity and used several different kinds of bait. On the third day Peter was lucky. Using an artificial frog as bait, he managed to hook the monster. There was a desperate fight but Peter was determined to capture the pike and succeeded. When he had got it ashore and killed it, he wieghed the fish and found that it scaled nearly thirty pounds – a record for that district. Question 1.Why do you think Peter was sitting quietly by the lake? A. He was watching the ducks. C. He was waiting for the pike to appear. B. He wasn’t very talkative. D. He was fishing Question 2. To what does surprise in line 3 probably refer? A. to the duck. B. to the ducklings. C. to the action of the pike. D. to the time of the day. Question 3. What were Peter’s feelings about the incident two days later? A. He caught and killed the pike. C. He vowed that he would catch the remaining ducklings B. He remained determined to catch the pike. D. He caught a frog and used it as bait for the pike. Question 4. How much was the pike worth? A. about thirty pounds. B. about two hundred and forty dollars. C. the passage contains no information on this point. D. the passage says that the fish scaled nearly thirty pound. Question 5. Which of the following titles best sums up the whole passage? A. Mysterious disappearance of ducklings. C. Record pike caught by an angry fisherman. B. Revenge on a duck. D. Huge pike caught by fisherman after desperate struggle atsea.

một hỗn hợp gồm c2h2 và c2h4 có thể tích 5,6 lít khí (đktc) cho qua dung dịch br2 dư dung dịch này nặng thêm 6,8 g.tính thể tích mỗi khí trong hỗn hợp ban đầu

Số 19 trong covid 19 nghĩa là j

. Write the correct form of the words 1. The price of clay, supplies and equipment is a small percentage of the total cost to ......................pottery. (product) 2. Poem conical hats are believed to come from Tay Ho village in Hue, which was famous for ...........hat makers. (skill) 3. He was a very .....................and honest man who would never betray anyone. ( rely) 4. I often think of the ........................time we had together in Boston last spring. ( please) 5. As a ........................ businessman, he couldn’t imagine real poverty. ( wealth) 6. There is a growing .............................that Vietnam creates its own identity with numerous natural wonders. (recognize) 7. Although they never get angry, they are not always kind or ............................ ( tolerate)