Bài 4 trang8 SGK toán lớp 5 phần (b)

Những hằng đẳng thức đáng nhớ. 1. 9b^2 – 4a^2 2. 27x^3 + 1 3. 8x^3 - y^3

Cho 500 mL dung dịch bạc nitrat 1M (d = 1,2g/ml) vào 300ml dung dịch HCl 2M (d = 1,5g/ml). Tính nồng độ mol/l của các chất sau khi pha trộn và nồng độ % của chúng? Giả thiết thể tích chất rắn không đáng kể.

giúp e vs ạ hứa vote 5s + trlhn

BT2 Tìm số có ba chữa số giống nhau sao cho số đó chia hết cho 2 và chia 5 dư 1 BT3 tìm số dư mỗi số sau khi chia cho 2 và 5 A/ 8963 b/ 4789 c/ 4500 d/ 3915 BT 4 Chứng tỏ rằng với mọi số tự nhiên n thì A) Tích ( n+3 )(n+ 6 ) chia hết cho 2 B) Tích n (n+ 5 )chia hết cho 2 BT5 có bao nhiêu số tự nhiên nhỏ hơn 100 và chia 5 dư 3 MONG LÀM GIÚP HỨA CHO 5 * VÀ CTLHN NẾU ĐÚNG

cho mình hỏi cách làm cho mấy cái mascot như thế này chuyển động trong video

tính bằng cách thuận tiện nhất ; 56000 : 25 : 4 =

lm mik vớillllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll

Xét sự đơn điệu của hs y=3/x^2+1

indicate the word whose underlined part is pronounced differently from that of the others . 1.​A. achieved​B. advanced​C. required​D. replied 2..​A. rusty​B. punctual​C. universal​D. subject to indicate the word whose main stress position is placed differently from that of the others . 3. A. resort​B. expedition​C. environment​D. affordable 4.​A. cucumber​B. delicious​C. tomato​D. nutritious Mark letter A, B, C, or D to indicate the correct preposition or adverb particle that completes the sentence. 5. Craftsmen have to find ________ the domestic and international markets so that they needn’t depend on the middlemen for their sales. A. in ​B. about​C. out​D. out about 6.​“Quang ganh” is two baskets hung from either end of a bamboo pole _________ the shoulders. A. across​B. on​C. at​D. above Mark letter A, B, C, or D to indicate the word OPPOSITE in meaning to the underlined word. 7. I can’t concentrate on my work because of the noise caused by my children. ​A. focus​B. abandon​C. neglect​D. allow Mark the letter A, B, C, or D to indicate the correct word or phrase to complete each of the sentences. 8. To become a novelist, you need to be​ _______ A. imagine​B. imagination​C. imaginative​D. imaginably 9. _________ you study for these exams, _________ you will do. ​A. The harder / the better​B. The more / the much ​C. The hardest / the best​D. The more hard / the more good 10. Common eating habits than can lead to ________ are: eating too last, eating when not hungry, eating while standing up, and skipping meals. A. gain weight​B. weight gain​C. put on weight​D. be heavy 11.​“It’s nearly Tet holiday already” ​- “__________” ​A. How time flies!​B. Thanks a million ​C. Don’t make me laugh!​D. No such luck Make letter A, B, C or D to indicate the part that is incorrect. 12.​Tom used to going to a lot of parties when he was a student. ​A​B​C​D 13.​He said that he has done his homework since 7 o’clock. A​ B​ C​ D Read the following passage A, B, C or D to indicate the correct word that best completes each blank. ​Some people believe that soon schools will no longer be necessary. They say that (14) _______ the Internet and other new technologies, there is no longer any need for school buildings, formal class, or teachers. Perhaps this will be true one day, but this is hard to (15) _______ a world without schools. In fact, we need to look at how we can use new technology to make schools better, not to eliminate them. We should invent a new kind of school that is (16)​_______ to libraries, museums, science centers, laboratories, and even companies. ​14.​A. despite​B. because of​C. thought​D. because ​15.​A. know​B. realize​C. imagine​D. consider ​16.​A. limited​B. linked​C. contributed​D. addressed