Chen Ming read a storybook and read an average of 11 pages a day for the first three days. He read an average of 18 pages a day for the next four days. How many pages did Chen Ming read on average in the past seven days?
Suppose the book has a total of x pages, and Chen Ming has read a total of y pages in these seven days: - Chen Ming read 11*3=33 pages in the first three days - In the next three days, Chen Ming read a total of 18*3=54 pages - In seven days, Chen Ming read a total of y*7=497 pages Therefore, Chen Ming read an average of 497/7=74 pages a day in the past seven days.
Lili finished reading a storybook in 8 days. She read 150 pages in the first 3 days. For the next 5 days, I read 42 pages a day. How many pages do I read on average every day?
Lili spent 8 days to finish reading a storybook. She read 150 pages in the first 3 days and 42 pages a day in the next 5 days. So she read a total of $150/times 3 + 42/times 5 = 2220$pages. And the total time she spent was $8$days, so she read an average of $2220 / 8 = 265$pages per day. So Lili read an average of 265 pages a day.
Zhang Ming read a storybook and read 30 pages a day. Three days later, there were still 58 pages left. How many pages does this storybook have?
Assuming that this storybook has a total of $x$pages: - The number of pages Zhang Ming read every day was $30. - The number of pages required to read the book in 3 days was $30,000. - The remaining page count was $58. Therefore, we can write an equation to solve this problem: $$ 30x + 58 = x $$ By solving this equation, one could obtain: $$ x = 58 - 30 = 28 $$ Therefore, this storybook had a total of 28 pages.
A storybook had 600 pages. Ling Ling read 34 pages a day on average. Could he finish the book in 17 days?
No. Ling Ling read an average of 34 pages a day. It would take her 17 days to finish a 600-page story book. But because the storybook had 600 pages, it would take 17 days for Lingling to finish reading half of the storybook, which was 150 pages. Therefore, Ling Ling needed to read 34 pages/2=17 pages every day to finish the 150-page storybook in the 17th day.
Little Ming read a book. He read 15 pages in the first 4 days and 6 pages a day in the next 5 days. How many pages did he read on average every day?
Xiao Ming read a book for the first 4 days and read 15 pages, then read 6 pages every day for 5 days. We can use the following formula to calculate the average number of pages seen per day: Average number of pages read per day = total number of pages/days Substituting the total number of pages and the number of days into the formula, we get: Average number of pages read per day = 15 pages/4 days = 3 pages/day Therefore, Xiao Ming read an average of three pages a day.
Xiao Ming read a book. He read 72 pages in the first 4 days and 29 pages a day for the next 6 days. How many pages did he read on average every day?
If Xiaoming reads 72 pages in the first 4 days, then Xiaoming's total page count in the first 4 days is 72 pages. Reading 29 pages every day for the next 6 days would mean that the total number of pages for the next 6 days would be 29 pages x 6 days = 171 pages. Therefore, Little Ming's total page count in the last six days was 171 pages. Little Ming read 171 pages per day for the next 6 days, 6 days = 27 pages. Therefore, Xiao Ming read an average of 27 pages a day.
Xiao Ming read a 480-page storybook and read page A every day for 12 days. How many pages are left?
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.
Xiao Dong read a storybook. He read 68 pages in the first four days and 72 pages in the next three days. How many pages does Xiao Dong read on average every day?
Assuming that the total number of pages Xiao Dong read every day was constant, then the average number of pages he read every day could be calculated by calculating the total number of pages in the first 4 days and the last 3 days. The total number of pages read in the first four days was 68, so Xiao Dong had read a total of 68 pages in these four days. The total number of pages he read in the next three days was 72 pages, so Xiao Dong read a total of 72 pages in these three days. Therefore, Xiao Dong had read a total of 68 + 72 + 10 + 2 = 190 pages in these 8 days. Divide the total number of pages by the total number of pages you read every day to get the answer to how many pages Xiao Dong reads on average every day: 190/8 = 225 pages The answer was 225 pages because Xiao Dong read an average of 225 pages a day.
A storybook, read an average of 15 pages a day. After reading for 12 days, the remaining pages are more than 2/7. How many pages are left?
There was a total of $12/15 - 1/15 = 165$pages left in the storybook. After reading the remaining two-sevenths, the remaining pages were two-sevenths of the original number. Therefore, he still needed to look at $165/div2/7 = 105$. Therefore, there were still 60 pages left.
Lili read a storybook. She read 78 pages in the first 3 days and 40 pages a day in the next 4 days. how much of this book
Assuming the book has a total of n pages, Lili read 78 pages in the first 3 days, then there are still n - 3 × 78 = n - 262 pages not read. In the next four days, she read an average of 40 pages a day. In these four days, Lili read a total of 40 × 4 = 160 pages. Therefore, Lili had read a total of n - 262 + 160 = 322 pages, just enough to finish the book. So this book had 322 pages.
Xiao Ming planned to finish reading a storybook in 16 days, which was an average of 15 pages per day. Now it takes 10 days to finish reading. How many pages should I read on average every day?
Xiao Ming planned to finish reading a storybook in 16 days. On average, he would read 15 pages a day. 16 days x 15 pages/day = 280 pages Now he needed 10 days to finish the book, so how many pages did he need to read every day? Assuming that Xiao Ming can finish reading the book in 10 days, the total number of pages he needs to read every day is: 10 days x 280 pages/day = 3000 pages Therefore, Xiao Ming needed to read 3000 pages per day on average, divided by 10 days = 300 pages per day.