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A book had a total of 170 pages. He had already read 90 pages. How many pages were left?

2024-09-07 17:18
A book had a total of 170 pages. He had already read 90 pages. How many pages were left?
1 answer
2024-09-07 20:58

There were 170 pages in a book. He had already read 90 pages, so there were still 80 pages left.

A comic book had a total of 19 pages. He had already read seven pages. How many pages were left?

1 answer
2024-09-16 10:50

This comic book had a total of 19 pages. He had already read 7 pages, so there were 19 - 7 = 12 pages left.

A book had a total of 90 pages. He had read three-fifths of it. How many pages were left?

1 answer
2024-09-16 11:35

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.

A book had a total of 150 pages, and Xiao Ming had already read 80 pages. How many pages have you read? How many of them were left?

1 answer
2024-09-16 10:54

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.

A book with a total of 240 pages. Xiaolan has already read 2/3 of the total pages of the book. How many pages are left to read and write?

1 answer
2025-03-10 03:12

Xiaolan had already read 2/3 of the total number of pages in the book, so she had already read (2/3) × 240 = 80 pages. The remaining pages were 240 - 80 = 160 pages. Therefore, there were still 160 pages left to read.

Xiao Ming had read 80 pages of a science and technology book, and there were 31 pages left. The pages that he had read and the pages that he had not read each accounted for a fraction of the total pages of the book.

1 answer
2024-09-11 02:54

The total number of pages in this book is 101. Xiao Ming has read 80 pages and has not read the remaining 31 pages. Therefore, the number of pages that Xiao Ming has read accounts for the total number of pages:80 pages/101 pages =08(copies) The number of pages that have not been read accounts for the total number of pages:31 pages/101 pages =03(copies) Therefore, there were 08 copies and 03 copies for those that Xiao Ming had seen and those that he had not seen.

Naughty was reading a storybook. He had already read 5/7 of the total number of pages. There were still 40 pages left. How many pages were there in this storybook?

1 answer
2025-03-10 03:16

Let's say this storybook has a total of $x$pages. Naughty had finished reading $5/7$of the total page count, which meant that he had $2/7$left. Therefore, Naughty still needed to read $40$to finish the total number of pages. According to the meaning of the question, mischievous still needs to look at $40$pages, so $x - 40$should be divided by $7$. Since $x$is the total number of pages,$x$should be greater than or equal to $40$. Therefore, we can write an equation: $$x \geq 40 + 40 \times 7 = 560$$ The solution to this equation is $x=567$. So this story book had a total of $567$pages.

Ding had read 300 pages of a book, which was 27 pages less than the number of pages he had not read. How many pages were left?

1 answer
2024-09-19 03:20

Assuming that the book has a total of n pages, then the ones that Ding has not read are n-300 pages. According to the question, Ding read 300 pages more than he did not. n - (n-300) = 300 To simplify it: 2n - 300 = 300 2n = 300 + 300 2n = 600 n = 300 Therefore, the book had a total of 300 pages. Little Ding had already read 300 pages, but he hadn't read 300-300=0 pages. Hence, there were still 0 pages left.

A book had a total of 200 pages, and he had already read 120 pages. What percentage of the book had he read?

1 answer
2024-09-18 14:33

A book has a total of 200 pages, and 120 pages have been read. The percentage of the book can be calculated by calculating the ratio of the number of pages in the book to the number of pages that have been read. The total number of pages in the book is 200, and the number of pages that have been seen is 120. Therefore, the ratio of the number of pages that have been seen to the number of pages in the book can be calculated as: 120 ÷ 200 × 100% ≈ 625% Therefore, he had read about 625% of the book.

A storybook had 72 pages. He had clearly read two-ninths of the book. How many pages had he read? How many pages were left?

1 answer
2024-09-18 15:27

He had clearly read two-ninths of the book, which was page 18. Therefore, there were still 64 pages left in the book.

A book had a total of 200 pages, and he had already read 40 pages. How many percent less had he read than he had not?

1 answer
2024-09-13 12:42

If a book has 200 pages and 40 pages have been read, then the number of unread pages is 160. The ratio of pages that have been read to the number of pages in the book is:40 pages/200 pages =02%. Therefore, the answer for those who have read less than those who have not read is:02%-100%=002%. In other words, it was about 2% less than those who did not study.

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