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Little Light had a book. He read 18 pages on the first day, which was two-fifths of the book. How many pages were left?

Little Light had a book. He read 18 pages on the first day, which was two-fifths of the book. How many pages were left?

2024-09-18 15:30
1 answer

This book was left: Two-fifths of the book is 18 pages, 2/5 = 9 pages (with two decimals) Therefore, there were still nine pages left in the book.

Three fifths of a book has been read, and there are 15 pages left. The number of pages read is a fraction of the number of pages not read

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.

1 answer
2024-09-18 15:44

A book has 170 pages. Xiaowen has read two-fifths of it. How many pages are there left?

Xiaowen had read two-fifths of the book, which meant that Xiaowen had read 170 pages divided by 2 = 85 pages. There were still 170 - 85 pages = 85 pages that he had not read.

1 answer
2024-09-10 12:51

I have read two-fifths of a book, and there are still 135 pages left to read. I want the number of pages in the whole book.

Suppose the book has x pages. It was known that two-fifths of the book had been read, and the remaining pages were 135. Therefore, he read this book in total: 135/(2/5 + 1) = 625/7/5 = 1275 pages. Since the total number of pages in the book is x, there are: x = 1275 pages. Therefore, the total number of pages in the book was: x = 1275 pages.

1 answer
2024-09-18 16:15

Xiao Hong read a book and read 15 pages a day. After four days, she still had three-fifths of the book left. How many pages was this book?

Let's say the book has $x$pages. Reading 15 pages a day, it would take Xiaohong $x$days to finish reading this book. The remaining pages were three-fifths of the book, which was $025x$. According to the question, it would take Xiaohong four days to finish reading this book. Therefore, we can write the equation: $$ x + 025x = 025 \times (x+4) $$ Solve this equation: $$ x = 30 $$ So this book has 30 pages.

1 answer
2025-02-28 21:53

Little Lin had read one-tenth of the book on the first day, and four-fifths of the first day on the second day. There were still 123 pages left. How many pages were there in this book?

Kobayashi read one-tenth of the book on the first day. On the second day, he saw four-fifths of the first day, which was 4/5 × 1/10 = 8/10. Therefore, the remaining pages were 1-8/10 = 2/10 of the entire book. There were 123 pages left. Therefore, this book had a total of 123 + 2/10 = 123 + 2 × 1/10 = 123 + 2/5 = 125 pages.

1 answer
2025-03-08 00:37

He had clearly read four-fifths of the story book, but there were still 16 pages left. How many pages was this book?

He had clearly read four-fifths of the storybook, and there were still 16 pages left to write the equation: He had clearly read 4/5 of the storybooks, and there were 16 pages left. 1 + 4/5 = 9/5 books Because I have read 4/5 storybooks, each storybook has: 4/5/1 = 8/15 pages Therefore, this book had: 9/5 × 8/15 = 96/15 pages It was about six pages.

1 answer
2025-03-07 23:53
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