Little Fatty was reading a book. He had already read half of the book, but three pages were missing. There were still 90 pages left. How many pages were there in this book?
Lil 'Fatty had already read half of the book. Three pages were missing, which meant 1/2 - 1/2 + 3 = 2/3 pages. Therefore, Lil 'Fatty had already read 2/3 of the pages and there were still 90 pages left. This meant that the book had a total of 90/2/3 = 90/3 = 300 pages. Therefore, the book had a total of 300 pages.
He had already read three-quarters of the book and there were still twenty-four pages left. How many pages were there in the book?
He had already read 3/4 of the book, which was 1/2 of the pages, so the remaining pages should be twice the number of pages in the book, which was 24 pages. The total number of pages in the book = 1/2 × 120 pages. Therefore, the book had a total of 120 pages.
Xiao Lin was reading a book. He had already read 180 pages, and there were still 5/6 left. How many pages is this book?
This book had a total of 180 + 5/6 = 195 pages.
A book had a total of 170 pages. He had already read 90 pages. How many pages were left?
There were 170 pages in a book. He had already read 90 pages, so there were still 80 pages left.
Zhang Bin was reading a book. He had already read 39 pages, and there were still two-fifths left. How many pages were there in this book?
This book had: 39 + 2/5 = 39 + 06 = 406 pages. Because the number of pages in a book must be an entire number, the decimals needed to be rounded to the nearest whole number. Therefore, the book had a total of 40 pages.
There were 360 pages in a science book. Little Ding Ding had already read more than half of the pages. How many pages were left?
Little Ding Ding had already read more than half of the pages, so there were still 360 - 10 - 50 = 190 pages left.
A comic book had a total of 19 pages. He had already read seven pages. How many pages were left?
This comic book had a total of 19 pages. He had already read 7 pages, so there were 19 - 7 = 12 pages left.
Xiao Ming was reading a storybook. He had already read 40% of the book, and there were still 90 pages left. How many pages does this book have?
This book has a total of $90+40%<<20>>= 1620$pages. Of which, 40% of the pages were already read by Xiao Ming, and the remaining 90 +80=170 pages were unread.
Xiao Ming was reading a storybook. He had already read 40% of the book, and there were still 90 pages left. How many pages does this book have?
This book has a total of $90+ 40%$ $×$pages. Substituting 40% into the above formula: $90+04×$ $×$pages = $90+04×$ $×$ (100-90) = $90+04×$ $× $10 = $90+04×$ $× $100 = $90+40=130$pages Therefore, the book had a total of 130 pages.
A book had a total of 90 pages. He had read three-fifths of it. How many pages were left?
A book of 90 pages, three-fifths read, then there was still: 90 - 3/5 * 90 = 90 - 36 = 54 pages. Therefore, there were still 54 pages left.
Zhang Ming was reading a storybook. He read 30 pages a day. After three days, there were still 8 pages of the book left. How many pages were there in this storybook?
Let's say this storybook has a total of $x$pages. According to the topic, 30 pages per day meant $30/div2 = 15$per hour. Zhang Ming read $15$pages per hour in $3$days so he read $3/30 = 90$pages in total. The remaining pages are $8/5 of the book, so there are: $$ 90 - \frac{8}{5} = \frac{16}{5} $$ Because the question requires the number of pages in the book, you need to multiply this result by $x$pages to get: $$ x \times \frac{16}{5} = \frac{16}{5} \times x = 96 $$ Solve this equation to get $x = 56$. So this story book had a total of $56$pages.