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B1.50: Không đặt tính hãy so sánh a) a= 53 . 571 và b= 57 . 531 b) a= 25 . 26261 và b= 26 . 25251

vẽ đậu mầm cute / not cute NL : Ko có dì

Vẽ sơ đồ mạch điện gồm nguồn điện, bóng đèn, công tắc, dây dẫn điện. khi đóng công tắc hãy xác định chiều của dòng điện chạy trong mạch điện đó

Bài 1 tính nhanh a}1/21+2/21+3/21+4/21+5/21+......+17/21+18/21+19/21+20/21 b}1/10+20/100+300/1000+4000/10000 c} 4/3x7 + 4/7x11 + 4/11x5 + 4/15x19 + 4/19x23 + 4/23x27 BÀi 2 tính nhanh a} 4823+1560+5177+8440 b} 10556+8074+9444+926+1000 c} 576+789+467+111 Bài 3 tính nhanh 21,251+6,058+0,749+1,042 1,53+5,039+12,47+5,691

Read the following passage and choose the best answer to each of the question. Choose the letter A, B, C or D to answer these following questions My future house will be located on a wide lake. It will be quiet and peaceful. There will be wide roof to protect my house from the sun and rain. I will grow a lot of flowers around my house. Every morning, I will water them and arrange some flowers in my house. Inside my house, there will be a modern robot to make the house clean and tidy. There will be modern and convenient appliances, too. Maybe I might buy a boat to travel around. I will order food and drink online. They might deliver them by helicopters. 31: Where will the house located? A. on the moon B. in the sky C. on a lake D. in the field 32: What will protect the house from sun and rain? A. a wide garden B. a big robot C. a large energy D. a wide roof 33: Will there be any robots in the house? A. Yes, it is B. Yes, there will C. No, it isn’t D. No, there won’t 34: Why might the author buy a boat? A. to travel around B. to go fishing C. to sleep D. to buy food 35: How can he buy food and drink? A. by bike B. by boat C. at market D. online Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. 36: Although The Haunted Theatre is frightening, children love it. A. The Haunted Theatre is frightening, but children love it. B. The Haunted Theatre is frightening, because children love it. C. The Haunted Theatre is frightening, so children love it. D. The Haunted Theatre is frightening, for children love it. 37: A film is more exciting than a play. A. A play is more interesting than a film B. A play is as boring than a film C. A play is not as interesting than a film D. A play is not as interesting as a film 38: I have to do homework so I won’t watch TV tonight. A. I won’t watch TV tonight because I have to do homework. B. I won’t watch TV tonight but I have to do homework. C. I won’t watch TV tonight and I have to do homework. D. I won’t watch TV tonight or I have to do homework. 39: This program is funnier than that program. A. This program is more boring than that program. B. This program is not as funny than that program. C. That program is funnier than this program. D. That program is more boring than this program. 40. They began living here in 2020. A. They have started living here since 2020 B. They have living here since 2020 C. They have lived here since 2020 D. They have lived here in 202

viết 3 câu có: S+V - - - viết 3 câu có :S+V+O - - - 3 câu có:S+V+O+ chứa thông tin

A=1 B=6-4√x+2x/9-x với x>9,x≠9 Tìm các giá trị của x để B>A

Làm giúp mình và giải thích những câu chưa làm nha!

a) dung dịch dung dịch HCl 0,01 m và h2 SO4 0,05 m tính nồng độ ph b) dung dịch NaOH 0,02m và ba(oh)2 0,04m tính nồng độ pH c) 200 ml dung dịch chứa 7,3 g HCl tính nồng độ pH d) hòa tan 4,6 gam na vào 200 ml nước tính nồng độ ph