Teacher An wanted to read a 580-page novel. She had been reading for four days and had 252 pages left. How many pages did she read on average every day?

Xiaoling read a 300-page novel and finished reading 80 pages in the first four days, so Xiaoling had 300 - 80 = 220 pages left. Because Xiaoling needed to read 220 pages to finish reading, she needed to read 220/7 = 32 pages every day. Therefore, Xiaoling needed to finish reading the remaining 220 pages in the next 7 days, which meant that she needed 220/32 = 6 days. Therefore, Xiaoling needed to read 32 pages a day for the remaining six days to finish the novel.

Ya-chan reads a 114-page book, on average, 12 pages a day. After a few days, there are still 18 pages left. You can calculate it by the following steps: 114 pages/12 pages/day = 9 days Since Ya-chan needed 9 days to finish reading the book, he needed to read it from the 1st day to the 9th day, a total of 9 days. In these nine days, Ya-chan needed to read 12 pages a day, so in total, he would read: 12 pages/day x 9 days = 108 pages However, there were still 18 pages left, so Ya-chan had to read the remaining 18 pages every day: 18 pages/day = 1 page In other words, Ya-chan needed to read an extra page of the remaining 18 pages every day to finish the book.

Xiao Xiao read a 150-page book for four days and read two-fifths of the book. Xiaoxiao reads 1/5/4 = 1/10 of the book every day The book had 150 pages, so Xiaoxiao still needed to read pages 1 - 1/5 - 1/10 = 4/5. And because Xiaoxiao had already read two-fifths of the book, there were still four to five pages left. Hence, Xiao Xiao still needed to read 2/5 pages.

When Xiao Ming read page A of the storybook every day for 12 days, he had read a total of 12 × page A. Therefore, when Xiaoming reads a 480-page storybook, he still has 480 - 12 × a pages left. To calculate the remaining pages, he needed to know how many pages Xiao Ming read in the end and how many pages he read every day. If we assume that the last page that Xiao Ming read was 480 pages and he reads page a every day, then we can write the following equation: 480 - 12 × a = Remaining pages By solving this equation, we can get: Remaining pages = 480 - 12 × a = 480 - 12a Therefore, after reading page A for 12 days, Xiao Ming still had 480 - 12A pages left.

You can use the following formula to calculate the number of days it will take Xiao Ling to finish reading this novel: Days = total page count/page count for the first 4 days + 1(add 1 day later) Total pages = 290 pages The number of pages read in the first 4 days = 20 pages/day × 4 days = 80 pages/day Therefore, the total number of pages that Xiao Ling needed to read was 290, and she had read 80 pages a day for the first four days, totaling 480 pages. Next, Xiao Ling needs to read 30 pages/day in the next day, so she still needs to read 480 pages/30 pages/day = 16 days Therefore, Xiao Ling needed 16 days to finish reading this novel.

The average number of pages per day could be obtained by calculating the total number of pages per day and the remaining pages. Little Min had read the 120-page storybook for five days and was left with 35 pages. Therefore, the number of pages Little Min read every day was: 35 pages/5 days = 7 pages/day Therefore, Little Min read an average of seven pages a day.

If a book has 252 pages and has been read for 8 days and there are 12 pages left, then the total number of pages in the book is 252 - 12 = 240 pages. The number of pages he read every day should be 240/8 = 30 pages. Therefore, you should read 30 pages a day.