Giải thích các bước giải:
13-12+11+10-9+8-7-6+5-4+3+2-1
=13-(12-11)+(10-9)+(8-7)-(6-5)-(4-3)+(2-1)
=13-1+1+1-1-1+1
=13
Bạn tham khảo:$13-12+11+10-9+8-7-6+5-4+3+2-1$$= 13 + ( -12 - 1 ) + ( 11 + 2 ) + ( 10 + 3 ) + ( -9 - 4 ) + ( 8 + 5 ) + ( -7 - 6 )$$= 13 + ( -13 ) + 13 + 13 + ( -13 ) + 13 + ( -13 )$$= ( 13 - 13 ) + ( 13 - 13 ) + ( 13 - 13 ) + 13$$= 0 + 0 + 0 + 13$$= 13$
C1 "I'll see you soon," he said to me C2 She said tome, "I see the children quite often." Thank mn téc ạ
'' All computers are pretty much equal once connected to the internet; the only difference will be the speed of the connection WHICH is dependent on your Internet Service Provider and your own modem''. ''They include using a range of services to communicate and share information and things quickly and inexpensively with tens of millions of people, BOTH young and old and from diverse cultures around the world'' cho mk hỏi là tại sao lại dùng WHICH VÀ BOTH trong 2 câu này
49.5-(2x+1)=630:9 Giúp mình nha
Ai giúp mình mấy bài toán hình khó với
viết 1 PTPƯ có xảu ra sự oxi hóa? giải thích tại sao phản ứng đó được gọi là oxi hóa
I'm very busy," she said Thank mn téc ạ
bài kiêm tra cả nhad ô giúp voi gấp
ngày đầu tiên của năm nhuận là thứ hai.Hỏi ngày cuối cùng của năm đó là thứ mấy?
Đề 2. Hãy viết bài văn: Chứng minh tính đúng dăn câu tục ngữ: Có công mài sắt, có ngày nên kim
II. Phrasal verbs - Choose the best meaning of the words in italics. Circle A,B, or C. 1. Because of an accident, my train was held up for several hours. A. cancelled B. delayed C. checked D. continued 2. He no longer works here as a receptionist. He quit his job around three months ago. A. gave up B. looked up C. turned downed D. made up 3. How much longer do we have to wait? I think we should wait five more minutes. Hell arrive soon. A. come up B. keep up C. catch up D. turn up 4. James has good relationships with everyone in the company. A. gets on well B. gets away C. gets up D. gets back 5. He rejected our schools offer of employment, because he was offered a job in another school. A. broke down B. looked down C. turned down D. sat down 6. It took him six months to recover from his illness. A. go over B. get over C. take over D. look over 7. I hope to come back to New Zealand one day in the future. A. go B. visit C. return D. see 8. We’re running out of milk. Can you get some on your way home today? A. having a lot B. having no more C. needing some more D. needing less 9. Let’s log onto the website and find out what is on in Wellington. A. get information about B. share information C. post D. advertise 10. She’s looked throught the headlines with great interest. A. watched B. saw C. posted D. read
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến
