Tính nhanh \(-\)37 \(\times\) 54 \(-\)37 \(\times\) 45 \(-\) 37
Những câu hỏi liên quan
37×7+37×3gạch dưới 74×25-74×10
\(\dfrac{37\cdot7+37\cdot3}{74\cdot25-74\cdot10}=\dfrac{37\cdot\left(7+3\right)}{74\cdot\left(25-20\right)}\)
\(=\dfrac{37\cdot10}{74\cdot15}=\dfrac{370}{1110}=\dfrac{1}{3}\)
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Đặt thừa số trung trên tử là:37.(3➕7).
Dưới mẫu là:74.(25-10).
Tính đươc kết quả và thu gọn.kết quả:1
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Xem thêm câu trả lời
Bài 1: Tính hợp lý
a) ( - 68 + 42 ) - ( 5042 - 6068 ) - (-2)0
b) 29 × ( 19 - 37 ) - 19 ×(29-37)
c) (-15) × 24 + 15 × (-75) - 15
d) 1 phần 5 + 4 phần 7 - 11 phần 35
e) ( 13 × 95 - 73 ) - ( 13 × 45 + 27 ) - (-1)2021
a) Ta có: \(\left(-68+42\right)-\left(5042-6068\right)-\left(-2\right)^0\)
\(=-68+42-5042+6068-1\)
\(=6000-5000-1\)
\(=999\)
b) Ta có: \(29\cdot\left(19-37\right)-19\cdot\left(29-37\right)\)
\(=29\cdot19-29\cdot37-29\cdot19+19\cdot37\)
\(=-29\cdot37+19\cdot37\)
\(=37\cdot\left(-29+19\right)\)
\(=37\cdot\left(-10\right)=-370\)
c) Ta có: \(\left(-15\right)\cdot24+15\cdot\left(-75\right)-15\)
\(=\left(-15\right)\cdot24+\left(-15\right)\cdot75+\left(-15\right)\cdot1\)
\(=\left(-15\right)\cdot\left(24+75+1\right)\)
\(=-15\cdot100=-1500\)
d) Ta có: \(\frac{1}{5}+\frac{4}{7}-\frac{11}{35}\)
\(=\frac{5}{35}+\frac{20}{35}-\frac{11}{35}\)
\(=\frac{14}{35}=\frac{2}{5}\)
e) Ta có: \(\left(13\cdot95-73\right)-\left(13\cdot45+27\right)-\left(-1\right)^{2021}\)
\(=13\cdot95-73-13\cdot45-27-\left(-1\right)\)
\(=13\left(95-45\right)-\left(73+27\right)+1\)
\(=13\cdot50-100+1\)
\(=551\)
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Bài 1: Tính hợp lý
a) ( - 68 + 42 ) - ( 5042 - 6068 ) - (-2)\(^0\)
= -26 - (-1026) - 1
= - 26 + 1026 - 1
= 1000 - 1
= 999
Mấy câu còn lại c hơi làm biếng, sr :<<
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11 tháng 11 2021 lúc 21:43
Quan sát các mẫu vật xác định vị trí gọi tên các cơ quan của cây và hoàn thành bảng sau
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Mô tả?
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mẫu vật xách định là cái nào
go87f8o
III : Make the correct choice : 1. You can hear BBC news ______ all over the world. a. shows B. announcements C. receipts D. programs 2. Television can make things _____ because it presents information is an effective way. a. memory B. memorial C. memorable D. memorably 3. Do you understand this _____? ‘200 WOMEN GIVEN WRONG DIAGNOSIS’ a. report B. headline C. news D. advert 4. Children often prefer looking at _____ to reading books. a. newspapers B. comics C. articles D. commercials 5. In...
Đọc tiếp
< III >: Make the correct choice :
1. You can hear BBC news ______ all over the world.
a. shows B. announcements C. receipts D. programs
2. Television can make things _____ because it presents information is an effective way.
a. memory B. memorial C. memorable D. memorably
3. Do you understand this _____? ‘200 WOMEN GIVEN WRONG DIAGNOSIS’
a. report B. headline C. news D. advert
4. Children often prefer looking at _____ to reading books.
a. newspapers B. comics C. articles D. commercials
5. In Britain, there are some ‘terrestrial’ _____ on TV such as BBC1, BBC2, ITV1,...
a. programs B. series C. channels D. cables
6. ‘Is the paper published every day ?’ ‘No, it _____ out once a week.’
a. turns B. goes C. produces D. comes
7. Editorial _____ in ‘The Guardian’ tended to support the government in this matter.
a. comments B. complaints C. commands D. comedies
8. A _____ is a film with factual information, often about a problem in society.
a. series B. soap opera C. documentary D. drama
9. There was a report _____ The Independent _____ this new law.
a. on/ for B. in/ to C. in/ about D. on/ in
10. _____ is a system connecting millions of computer worldwide.
a. The television B. The Internet C. The media D. The phone
11. The scheme allows students from many countries _____ with each other.
a. communicate B. to communicate C. communicating D. communicates
12. _____ the storm warnings, we did not go out last night.
a. Since B. In spite of C. Because of D. The result
13. This is the fifth time you _____ me the same question.
a. ask B. asked C. are asking D. have asked
14. When I arrived at the party, Lucy _____ home.
a. has already gone b. had already gone C. already went D. already was going
15. English people spent 18 hours per week _____ TV.
a. watching B. to watch C. watch D. for watching
16. I’ve lived in a small house near the coast _____ 1990.
a. from B. since C. in D. for
17. She left home in 1993 and _____ since.
a. hasn’t seen B. didn’t see C. hasn’t been seen D. wasn’t seen
18. It’s time we _____ this old car and bought a new one.
a. will sell B. have sold C. had sold D. sold
19. Since Mr. Hassan _____ president, both taxes and unemployment _____.
a. has become/ increased B. became/ increased
c. became/ have increased D. has become have increased
20. _____ all my warnings, he tried to fix the computer himself.
a. Although B. In spite of C. Because D. Instead of
21. Some television programs _____.
a. may make children to be violent. B. make children be violent.
c. may make children violent. D. make children being violent.
22. I _____ away most of my old books when I moved house.
a. threw B. have thrown C. had thrown D. was throwing
23. You _____ whisper. Nobody can hear us.
a. needn’t to B. don’t have to C. mustn’t D. need to
24. The children _____ to the Botanical Garden.
a. were enjoyed taken b. were enjoyed taking C. enjoyed taking D. enjoyed being taken
25. So far this week there _____ three burglaries in our street.
a. are B. were C. have been D. had been
III : Make the correct choice : 1. You can hear BBC news ______ all over the world. a. shows B. announcements C. receipts D. programs 2. Television can make things _____ because it presents information is an effective way. a. memory B. memorial C. memorable D. memorably 3. Do you understand this _____? ‘200 WOMEN GIVEN WRONG DIAGNOSIS’ a. report B. headline C. news D. advert 4. Children often prefer looking at _____ to reading books. a. newspapers B. comics C. articles D. commercials 5. In...
Đọc tiếp
< III >: Make the correct choice :
1. You can hear BBC news ______ all over the world.
a. shows B. announcements C. receipts D. programs
2. Television can make things _____ because it presents information is an effective way.
a. memory B. memorial C. memorable D. memorably
3. Do you understand this _____? ‘200 WOMEN GIVEN WRONG DIAGNOSIS’
a. report B. headline C. news D. advert
4. Children often prefer looking at _____ to reading books.
a. newspapers B. comics C. articles D. commercials
5. In Britain, there are some ‘terrestrial’ _____ on TV such as BBC1, BBC2, ITV1,...
a. programs B. series C. channels D. cables
6. ‘Is the paper published every day ?’ ‘No, it _____ out once a week.’
a. turns B. goes C. produces D. comes
7. Editorial _____ in ‘The Guardian’ tended to support the government in this matter.
a. comments B. complaints C. commands D. comedies
8. A _____ is a film with factual information, often about a problem in society.
a. series B. soap opera C. documentary D. drama
9. There was a report _____ The Independent _____ this new law.
a. on/ for B. in/ to C. in/ about D. on/ in
10. _____ is a system connecting millions of computer worldwide.
a. The television B. The Internet C. The media D. The phone
11. The scheme allows students from many countries _____ with each other.
a. communicate B. to communicate C. communicating D. communicates
12. _____ the storm warnings, we did not go out last night.
a. Since B. In spite of C. Because of D. The result
13. This is the fifth time you _____ me the same question.
a. ask B. asked C. are asking D. have asked
14. When I arrived at the party, Lucy _____ home.
a. has already gone b. had already gone C. already went D. already was going
15. English people spent 18 hours per week _____ TV.
a. watching B. to watch C. watch D. for watching
16. I’ve lived in a small house near the coast _____ 1990.
a. from B. since C. in D. for
17. She left home in 1993 and _____ since.
a. hasn’t seen B. didn’t see C. hasn’t been seen D. wasn’t seen
18. It’s time we _____ this old car and bought a new one.
a. will sell B. have sold C. had sold D. sold
19. Since Mr. Hassan _____ president, both taxes and unemployment _____.
a. has become/ increased B. became/ increased
c. became/ have increased D. has become have increased
20. _____ all my warnings, he tried to fix the computer himself.
a. Although B. In spite of C. Because D. Instead of
21. Some television programs _____.
a. may make children to be violent. B. make children be violent.
c. may make children violent. D. make children being violent.
22. I _____ away most of my old books when I moved house.
a. threw B. have thrown C. had thrown D. was throwing
23. You _____ whisper. Nobody can hear us.
a. needn’t to B. don’t have to C. mustn’t D. need to
24. The children _____ to the Botanical Garden.
a. were enjoyed taken b. were enjoyed taking C. enjoyed taking D. enjoyed being taken
25. So far this week there _____ three burglaries in our street.
a. are B. were C. have been D. had been
1.Mực chất lỏng tăng lên chiếm bao nhiêu phần cột chất lỏng không khí ?
2 .Từ đó suy ra tỉ lệ thể tích oxi trong không khí ?
3.Không khí chứa những khí nào ? Thành phần là bao nhiêu ?
(Hóa học)
Mọi người giải nhanh giúp e vs ak.E đang cần gấp ak
cho hình chữ nhật ABCD,gọi M là Trung điểm của AB,AC cắt BD tại O.Lấy điểm N đối xứng O qua M.
a)CM tứ giác AONB là hình thoi
b)CM NO=BC;Tính diện tích hình chữ nhật ABCD khi AB=8cm,AN=5cm
c)Gọi P là giao điểm của tia CM và AN tính NP ÷AP
so sánh các cặp phân số sau
a)-251/21 và 21/251
b) 42/23 và 69/50
c) -81/84 và -75/88
cần gấp giúp mình với
Tìm và giải thích các hoán dụ trong các câu sau đây:
1: Cả trường đều vui vẻ trong ngày 26/3
2: Vở kịch có năm màn
3: Có nhiều khuôn mặt mới trong lớp học
4: Mỗi bữa nấu ba bò gạo
5: Nội các còn bỏ trống một số ghế bộ trưởng