4/5 x 3/7 + 6/7 x 4/5 - 4/5 x 4/14

Một thửa ruộng hình chữ nhật có chiều dài 150m, chiều rộng bằng 4/5 chiều dài. Người ta cấy lúa ở đó , tính ra cứ 100 m2 thu hoạch được 50 kg thóc. Hỏi thửa ruộng đó thu hoạch được bao nhiêu tạ thóc ? lm cho mik cả tóm tắt và bài giải nha , cảm ơn

Tính tích của 2/5xy và -5/6xy rồi tìm bậc của tích vừa tìm đc

Em hãy nêu sự chuẩn bị đánh quân Thanh của Quang Trung và Nguyễn Huệ

Khi chuyển những câu sau thành câu bị động, thường thêm bị hay được ? Tại sao ? a) Nhà nước tặng ông nhiều huân chương. b) Chúng em rất kính trọng cô giáo chủ nhiệm lớp. c) Cô giáo phê bình bạn Nam. d) Công an phạt người vi phạm luật lệ giao thông.

câu 1: cho tứ diện lồi ABCD biết ∠ABC= ∠ADC=90 độ, ∠BAD=150 độ và BD=2a. tính AC câu 2. cho lăng trụ ABC.A'B'C' đáy ABC là tam giác vuông cân tại A. biết B'B=B'A=B'C=2a, AB=a. tính chiều cao của lăng trụ.

Cho so FE+2HCL----->FEO2+H2 cho bt 11,2g FE tac dung voi dung dich HCL a) Tinh kl FECL2 tao thanh b) Tinh the tich H2 tao thanh o dktc Lam giup em voi cam on truoc ne.

( PRESENT PERFECT <=> SIMPLEPAST ) 1. how long has Michelle known you? -> how long ago__________________________ 2. how long has your family lived in HCM City? -> when_________________________________ 3. how long is it since you last saw Tom? -> how long____________________________ 4. when did your son start to listen to pop music? -> how long is it_____________________ 5. how long is it since you began swimming in the pool? -> how long ago_________________________________ 6. this is the first time we have been on a ship. -> we have not____________________________ 7. it is the first time i have read this book. -> i haven't_______________________________ ( SO/SUCH/TOO/ENOUGH) 1. the water is so dirty that we can't swim in this river. -> the water is not__________________________ 2. the game is too difficult for the the children to play. -> the game is not____________________________ ( REPORTED SPEECH) 1. he said to us: " you are my best friends" ->________________________________ 2 " we are waiting for the school bus", said the children ->____________________________________________ 3 " most of us have difficulty in learning English", said the children. ->_____________________________________________________ 4. Charlie said to Helen:" i haven't seen Kate recently" ->_____________________________________

1. No one in my class speaks English as fluently as Huong . =>Huong speaks __________________ 2. Both Lan and Huong don't like apples. => Neither Lan ____________________ 3. It was not necessary for you to work too late. => You needn't _____________________ 4.These test are too difficult for her to do . => They are such __________________ 5."We are spending more on education than ever before." He claimed => He claimed that more __________ 6. Mary last saw her parents when she left the city. => Mary was not ___________________ => The last time ____________________ 7. She last watched a film last Friday. => She has not __________________ => The last time _________________ 8. She has not met her father for two years. => It's two years ___________________ => The last time ____________________ 9."Don't forget to call on me when you are free" => She reminded __________________

word form: 1. she is so busy with..............activities that she has no time for entertainment (society) 2. the increase in population has led to................in many cities (crowd) 3. I found your performance last night.................interesting (surprise) 4. If you have a burn, quickly put the......................part under a running a cold tap (affect)