BÀI TẬP VỀ PHÉP NHÂN SỐ NGUYÊN Bài 1: Thực hiện phép tính a) 125. ( -8 ) b) ( - 12500 ) . ( - 8 ) c) (-2).(-4) . (-10) d) (-2 - 3) . (- 3 – 7 ) e) (-3+8) . (-2) f) (-3 -15 ) : 9 g) (13 - 17).(-10) + (-7)2 h) 72 - 24.(10 + 3). i) 512.(2-128) -128.(-512) j) 27.( -17) + (-17).73 k) 26. (- 125) – 125. (- 36) l) (-25).8.(-4).(-125).3 Bài 2: Tìm số nguyên x, biết: a) 2x- 9= -8 b) -3.|x-1|=-27 c) (x -1). 5 = - 25 d) 2x - ( - 27 ) = 15 e) 2.| x | = 8 f) – 3x – 2 = - 20 g) 5 – (10 – x) = 7 h) 3x + 21 = 15 i) 4x – 13 = - 29 j) -7|x| = - 35 Làm giùm e bài 1i) và bài 1k) 2b) 2f) 2g) 2j) e cảm ơn nhiều ạ

Mọi ngươid giúp em với ạ, ảnh ko mờ đâu

1. I ____________ a lot when I was younger. a. use to swim​​​b. used to swim ​ c. used to swimming ​d. didn't used to swim 2. People__________ so often, or they just didn't travel at all. a. used to travel ​​b. used not to travel c. didn't used to travel ​​d. didn’t use to travel 3. My brother__________ his leg in a car accident when he was 20. a. broke ​​​b. used to break ​​c. uses to break ​d. breaks 4. _________long hair when you were a teenager? a. Used you to have ​​b. Did you used to have c. Did you use to have ​d. Are you used to having 5. My Grandpa never__________ coffee. He always drank tea. a. uses to like ​​​b. used to like ​​c. didn't use to like ​​d. is used to like 6. She________ as a teacher for many years before she became a writer a. didn't use to work​​ b. used to worked ​​c. used to work ​d. worked 7. There______ a bus station there. When was it built? a. used to be ​​​b. usedn't to be ​c. didn't use to be ​​d. used not being 8. Dominic _________ to bed late on Fridays and Saturdays. a. usually goes ​​​b. uses to go ​​c. doesn't use to go ​​d. is used to go 9. What kind of music ________when she was a child? a. Nancy used to like ​​​ b. used Nancy to like c. did Nancy used to like​​d. did Nancy use to like 10. He _______several books a month, but he doesn't have time any more. a. usually reads ​​b. used to read ​c. used to reading ​d. didn't use to read

Dạng năng lượng tương tác giữa Trái Đất và vật là

Choose the correct answer 1. „I‟m a big fan of U2‟ Derek said.  Derek said he __________ a big fan of U2. A. was B. has been C. had been 2. „We‟re watching TV‟ said the twins.  The twins said they ________ TV. A. watched B. were watching C. had watched 3. „You‟ve been annoying me all day!‟ my mum said.  My mum said I ________ her all day. A. annoyed B. was annoying C. had been annoying 4. „The dog ate my homework!‟ said Ivan.  Ivan said the dog ________ his homework. A. was eating B. had eaten C. has eaten 5. „At one o‟clock, I was having lunch‟ said Molly.  Molly said she _______ lunch at one. A. had been having B. has had C. is having 6. „You‟ll get wet without an umbrella‟ Dad said.  Dad said I ____ wet without an umbrella. A. will be getting B. got C. would get 7. „You must give me your essays‟ Mrs. Vine said.  Mrs Vine said we ______ give her our essays. A. were having to B. had to C. would have to

4)Dùng 400kg than để đốt lò chạy máy. Sau khi kết thúc, thấy còn 15kg than vẫn chưa cháy hết a)Viết phương trình hóa học b) Tính hiệu xuất của phản ứng

Hãy trình bày những đặc điểm cơ bản của khí hậu Bắc Mĩ.

Một người thực hiện công 400J khi kéo một cái bàn đi 10m. Nếu người ấy kéo cái bàn đi 25m thì sẽ thực hiện một công là bao nhiêu. Biết rằng lực kéo không thay đổi.

Cho tam giác abc đều nội tiếp 0 và 1 điểm m nằm trên cu g nhỏ bc

Cho tam giác ABC vuông tại A, biết AB=9, BC= 15 a) Tính AC b)gọi M ,N lần lượt là trung điểm của AB,AC.Tính MN C)Tính diện tích tam giác ABC