I need more context to answer this question. Please provide me with more details about the story and how Xiaoxiao read the book so that I can better answer your questions.
Assuming that there were still x pages left, the number of pages that had been read would be 420 - x. According to the question, the number of pages that have been read is the remaining three-quarters, so the following equation can be written: 420 - x = 3/4 (420 - x) To simplify it: x = 396 Therefore, there were still 396 pages left.
If the number of pages seen is x, the remaining pages are 200-x. According to the meaning of the question, the equation can be listed: x = 60% (200-x) To simplify it: x = 60% × 200 - 60% × x To solve the equation: 120 - 30% × x = 200 30% × x = 80 x = 240 Therefore, the number of pages he had seen was 240.
The storybook has a total of 100 pages. The number of pages that have been read is four times that of the number of pages that have not been read. The known number of pages seen = the number of pages seen + the number of pages left, which was 4 unseen pages = the number of pages seen + the number of pages left. Transferring the items would yield 5 pages remaining = 4 pages viewed, which meant that the remaining pages = 4 pages viewed divided by 5. Since the story book has a total of 100 pages, 4 pages viewed/5 = 8 pages remaining. Thus, there were still eight pages left.
If a book has been read three-fifths of the way and there are 15 pages left, then the number of pages read is the number of pages not read: Number of pages seen/number of pages not seen = 3/5/4/5 = 3/4 Therefore, the number of pages that had been read was four-thirds of the number of pages that had not been read.
Xiao Ming had already read 80 pages, so the number of pages he had read accounted for 2/3 of the total number of pages. The remaining pages were 150 - 80 = 70 pages. Therefore, the remaining pages accounted for 1/3 of the total number of pages.
If the remaining 75% of the pages of a book were read, it meant that 75% of the pages had not been read. Then, the number of pages that were read would be 25%+80% = 3/4. The number of pages left is a fraction of the number of pages seen. It can be calculated in a similar way: the number of pages left is 1 -the number of pages seen = the number of pages left-the number of pages seen = 75% x the number of pages left divided by the total number of pages. Therefore, the remaining pages were 75% of the total number of pages. The answer was that the remaining pages were 75% of the number of pages read divided by the total number of pages.
It was wrong to say that the number of pages that had been read was 1/7 of the number that had not been read. This was because when reading a novel, one would usually mark the number of pages in the process of reading, such as marking the number of pages at the end of each page or using a bookmark to record the parts that had been read. Therefore, the number of pages read and the number of pages not read may be different, but their ratio should be the same.
Xiao Ming read 39 pages and there were 52 pages that he did not read. The percentage of pages that Xiao Ming read in the total number of pages in this book is: 39 pages/52 pages = 7385% Therefore, the number of pages that Xiao Ming read accounted for 7385% of the total number of pages in the book.
Assuming that the number of pages that Little Ding Ding had read was x, the remaining pages were 170-x. According to the conditions in the question, the number of pages seen is 10 pages more than the remaining pages. The following equation can be listed: x = (170 - x) + 10 To simplify it: 2x = 180 x = 90 Therefore, the number of pages that Little Ding Ding had read was 90, and the remaining pages were 170-90=80. Therefore, Little Ding Ding still had 80 pages left to read.
Suppose the book has x pages. Since he had already read 8 pages, the remaining pages were x - 8. In addition, the number of pages in the book was four times the number of pages read, which meant that the remaining pages were 4x. According to the meaning of the question, we can list the equation: x - 8 = 4x Solve the equation: 2x = 8 x = 4 Therefore, this book had a total of four pages.