Little Red was reading a fairy tale book. Every day, she would read 15 pages. After four days, she still had 3/5 of the book left. How many pages was this fairy tale book?
Little Red read a fairy tale book for 15 pages a day. After four days, she still had 3/5 of the book left. Assuming that this fairy tale book has a total of x pages: Little Red read a total of 4x15 = 60 pages in four days. The remaining pages are 3/5 of the book, so there are: 60 pages/(3/5) = 120 pages. Therefore, this fairy tale book had a total of 120 pages.
Little Red read a book and read 15 pages a day. After four days, she still had 3/5 of the book left. How many pages was this book?
Little Red reads a book 15 pages a day, and after 4 days, there is still 3/5 of the book left. We can assume that this book has x pages. According to the question, Little Red had read a total of $4/times 15 = 60$pages in 4 days. The remaining pages are 3/5 of the book, so there are: $$ 60\div 3/5=24 $$ Therefore, the book had 24 pages.
Little Red read a book and read 15 pages a day. After four days, she still had 3/5 of the book left. How many pages was this book?
Assuming that the book has a total of $x$pages, then Little Red has read $x/times 15$pages in 4 days. The remaining pages are 3/5 of the book's worth, so there are: $$x <times 15><times 3/5>= Total pages $$ Solve this equation: $$x = \frac{total pages}{15} = \frac{1200}{15} = 80$$ Therefore, the book had a total of 80 pages.
Little Ming was reading a fairy tale book. He had planned to read 12 pages a day, but he actually read eight more pages a day. In the end, he finished reading it two days earlier. How many pages does this book have?
Let's say the book has $x$pages. The original plan was to read $12$pages a day, so it would take $x$Mum $12$days to read the entire book. In fact, it would take an extra $8$a day to read the entire book, so it would take $x$Mum $12$ + $2$days. Because Xiao Ming finished the book two days earlier, he actually spent $x$Mum $12$ + $2$ - $1$days to finish the book. We can solve this problem by using the exponential sequence sum formula: $$x \div 12 + 2 - 1 = \frac{x \times (12+2)}{12}$$ The solution is $x=300$. Therefore, the book had a total of $300$pages.
Little Red read a book and read 15 pages a day. After four days, there were still three-fifths of the book that she had not read. How many pages was this book?
Little Red reads 15 pages a day for 4 days and still has 3/5 of the book left. She can write the following equation: Remaining pages/pages per day = 3/5 of the book Solve the equation: Remaining pages = 3/5 x pages of the book Substituting the remaining pages into the original book's page count, he obtained: 3/5 x pages of the book = 15 pages Therefore, this book had: 15 pages × 3/5 = 15 pages/3/5 = 150 pages
How many pages was this fairy tale book? One of them had been read for two days, reading 12 pages a day, leaving 18 pages. The other book had the same number of pages.
Lili is reading a 90-page fairy tale book. How many pages are there left? I read eight pages a day, and he has been reading for nine days.
When Little Red was reading a book, 5/7 of the pages she had read was equal to 3/5 of the pages she had not read. Little Red had already read 210 pages. How many pages were left?
According to the description of the question, 5/7 of the pages that Little Red had read was equivalent to 3/5 of the pages that she had not read. The number of pages Little Red has read = the number of pages she has not read x 5/7 = 210 pages x 3/5 = 350 pages Therefore, Little Red had 210 pages- 350 pages = 80 pages left. Therefore, Little Red still had 80 pages to read.
Little Light read a book. On the first day, he read six pages. After that, he read four more pages every day. On the third day, he read two-fifths of the book and continued to read.
Xiao Hua reads a book on the first day, reads six pages, then reads four more pages every day, and on the third day, he reads two-fifths of the book. According to the question description, Little Light read four more pages every day than the previous day, so the total number of pages per day was the total number of pages on the previous day plus four pages. Therefore, after Little Light read six pages on the first day, the number of pages he read every day was the number of pages from the previous day plus four pages, which was six pages + four pages = ten pages. From the second day onwards, Little Light read four more pages a day than the previous day. Therefore, the number of pages he read every day was the number of pages from the previous day plus four pages, which was 10 pages + 4 pages + 4 pages = 16 pages. By analogy, we can find that when Little Light reads to the n-th day, the number of pages Little Light reads every day is the number of pages from the previous day plus 4 pages, which is n-pages + 4 pages. Therefore, by the third day, Little Light had read 2/5 of the book, which was 32 pages + 4 pages = 36 pages. Therefore, after the third day, Little Light still had 16 pages left to read. The total number of pages in the book was 36, so Little Light needed to read another 16 pages to finish reading.
How many pages were there in the book that made Little Red read three more pages than Little Light every day, and Little Red finished reading it five days earlier than Little Light?
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Little Cong read a book and read 15 pages a day. After four days, there were still three-fifths of the book that he had not read. How many pages was this book?
Suppose the book has x pages: Little Cong read 15 pages a day for four days, a total of 4×15=60 pages. The total number of pages in the book is x, so: 60÷(1+3/5)=x÷5 The solution was:x=60×5 div3 =600 div3 =200 pages. Therefore, the book had a total of 200 pages.