教我做please
2011-08-21 3:55 am
There are 6 Arts books in a bookcase.The number of Arts books in that bbookcase is 25% that of Scientific,and the number of Scientific fictions is 40% of the whole number of books.How many books are there in the bookcase?
回答 (2)
2011-08-21 4:39 am
✔ 最佳答案
6除25%除40%=24除40%
=60
There are 60 books in the bookcase.
最佳thx!
2011-08-21 4:37 am
Divide this question in steps. Find the number of arts book first, then find the number of scientific books.
1)Since 25% = 25/100 = 1/4
Therefore arts books x4 = the number of scientific books = 24 books.
2)Set up a equation now.
(Let the total number of the books in the bookcase be A.)
A x 40% = 24 (the number of scientific books)
So, A = 24/40%
Finish. There are 60 books in the bookcase.
1)Since 25% = 25/100 = 1/4
Therefore arts books x4 = the number of scientific books = 24 books.
2)Set up a equation now.
(Let the total number of the books in the bookcase be A.)
A x 40% = 24 (the number of scientific books)
So, A = 24/40%
Finish. There are 60 books in the bookcase.
參考: me?
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