A bookstore had a box of books. One half but 5 fewer books were sold on the first day. One third of the remaining part and 12 more books were sold on the second day. Finally, 20 books are left. How many book(s) did the bookstore have originally?
A bookstore had a box of books. One half but 5 fewer books were sold on the first day.
One third of the remaining part and 12 more books were sold on the second day. Finally,
20 books are left. How many book(s) did the bookstore have originally?
A bookstore had a box of books. One half but 5 fewer books were sold on the first day.
One third of the remaining part and 12 more books were sold on the second day. Finally,
20 books are left. How many book(s) did the bookstore have originally?
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A book store had a box of books. One half but 5 fewer books were sold on the first day. One third of the remaining part and 12 more books were sold on the second day. Finally 20 books are left. How many book(s) did the book store have originally?
Giúp mình với :
A book store had a box of books. One half but 5 fewer books were sold on the first day. One third of the remaining part and 12 more books were sold on the second day. Finally 20 books are left. How many book(s) did the book store have originally?
3. A stationery store had a batch of ball pens. One half and 7 more pens were sold on the first day. One half of the remaining part but 4 fewer pens were sold on the second day. Finally, 1 8 ball pens are left. How many ball pen(s) did the stationery store have originally?
Một cửa hàng văn phòng phẩm có một số bút bi. Một nửa và 7 chiếc bút nữa được bán trong ngày đầu tiên. Một nửa số bút còn lại nhưng ít hơn 4 chiếc được bán trong ngày thứ hai. Cuối cùng, cửa hàng còn lại 18 chiếc bút. Hỏi ban đầu cửa hàng có bao nhiêu chiếc bút bi?
4 điểm
A.70
B.68
C.66
D.64
The first and second shelves of a bookshelf contains 120 books altogether.
20 book were transferred from the first to the second shelf.
35 books from the second shelf were transferred back to the first one.
The two shelves now containedthe same number of book.
How many books were on rach shelf at first?
giúp mik bài này zới.
cảm ơn các bn nhìu
Hai kệ sách tất cả chứa 120 cuốn sách .
Chuyển 20 cuốn sách từ kệ thứ nhất sang kệ thứ hai.
Chuyển 30 cuốn sách từ kệ thứ hai sang kệ thứ nhất.
Hai kệ bây giờ có số sách bằng nhau.
Có bao nhiêu cuốn sách trên mỗi kệ lúc đầu?
Giải
Chuyển 20 cuốn sách từ kệ thứ nhất sang kệ thứ hai và chuyển 30 cuốn sách từ kệ thứ hai sang kệ thứ nhất tức là chuyền 10 cuốn sách từ kệ thứ hai sang kệ thứ nhất thì số sách ở hai kệ bằng nhau.
Suy ra lúc đầu kệ thứ hai hơn kệ thứ nhất là : 10+10=20 (cuốn sách)
mà tổng số sách ở hai kệ là 120 cuốn
=> Số sách ở kệ thứ nhất là : (120-20):2=100:2=50 (cuốn)
<=> Số sách ở kệ thứ hai là : 120-50=70(cuốn)
Vậy kệ thứ nhất có 50 cuốn sách và kệ thứ hai có 70 cuốn sách
Hai kệ bây giờ có số sách bằng nhau.
Chuyển 30 cuốn sách từ kệ thứ hai sang kệ thứ nhất.
Chúc bạn học tốt
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks.
Today there are libraries in almost every towns in the world. Even in areas (68)________there are no libraries, there are often mobile libraries which take books from one village to (69)________. But in the days when books were copied by hand (70)________than printed, libraries were very rare. The reason is simple: books took a very long time to produce, and there were far fewer copies of any given work around. The greatest library (71)________all, that in Alexandia had 54,000 books.
In the ancient world, this number (72)________considered huge. It was the first time that anyone had collected so many books from all around the world (73)________one roof. There are many theories about why these books were lost. (74)________is that the library accidentally burned down. Another is that one of the rulers of the city ordered the books to be burned. They were taken to various places and it took six months to burn them. (75)________happened, the collection there was priceless. Many of the library’s treasures were lost forever, some books were never recovered. We cannot even know exactly what the library contained.
Question 73
A. in
B. under
C. over
D.below
Đáp án là B. under one roof: dưới một mái nhà
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks.
Today there are libraries in almost every towns in the world. Even in areas (68)________there are no libraries, there are often mobile libraries which take books from one village to (69)________. But in the days when books were copied by hand (70)________than printed, libraries were very rare. The reason is simple: books took a very long time to produce, and there were far fewer copies of any given work around. The greatest library (71)________all, that in Alexandia had 54,000 books.
In the ancient world, this number (72)________considered huge. It was the first time that anyone had collected so many books from all around the world (73)________one roof. There are many theories about why these books were lost. (74)________is that the library accidentally burned down. Another is that one of the rulers of the city ordered the books to be burned. They were taken to various places and it took six months to burn them. (75)________happened, the collection there was priceless. Many of the library’s treasures were lost forever, some books were never recovered. We cannot even know exactly what the library contained.
Question 72
A. is
B. was
C. were place
D. has been
Đáp án là B. Câu này chia thì quá khứ vì “In the ancient world” . Be considered + adj: được cân nhắc
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks.
Today there are libraries in almost every towns in the world. Even in areas (68)________there are no libraries, there are often mobile libraries which take books from one village to (69)________. But in the days when books were copied by hand (70)________than printed, libraries were very rare. The reason is simple: books took a very long time to produce, and there were far fewer copies of any given work around. The greatest library (71)________all, that in Alexandia had 54,000 books.
In the ancient world, this number (72)________considered huge. It was the first time that anyone had collected so many books from all around the world (73)________one roof. There are many theories about why these books were lost. (74)________is that the library accidentally burned down. Another is that one of the rulers of the city ordered the books to be burned. They were taken to various places and it took six months to burn them. (75)________happened, the collection there was priceless. Many of the library’s treasures were lost forever, some books were never recovered. We cannot even know exactly what the library contained.
Question 69:
A. other
B. others
C. the other
D. another