Little Light read two-fifths of the book and counted exactly 80 pages. How many pages were there in the book? (Writing)

2024-09-18 15:38

1 answer

2024-09-18 19:05

Assuming that the book has x pages, then Little Light has read 2/5x pages. Because Little Light counted 80 pages, there were: 2/5x + 80 = x Solve the equation: x = 50 Therefore, the book had a total of 50 pages.

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?

1 answer

2024-09-18 15:30

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.

Xiao Hong had already read 40 pages of the book, which was exactly two-fifths of the book. How many pages were left?

1 answer

2024-09-18 15:45

If Xiao Hong had already read 40 pages of a book, which was two-fifths of the book, then Xiao Hong had already read 20% or 0.2 times the book. How many pages are there in the book? You can divide the number of pages by the number of pages in the book: (100% - 02) / 100% = 90% Therefore, Little Red only had 10 pages left.

A book had 170 pages. Xiaowen had read two-fifths of it. How many pages were left?

1 answer

2024-09-03 19:47

Xiaowen had read two-fifths of the book, which meant that Xiaowen had read 2/5 * 170 = 48 pages. Therefore, there were still 170 - 48 = 122 pages that he had not read.

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

1 answer

2024-09-10 12:51

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.

Zhang Bin was reading a book. He had already read 39 pages, and there were still two-fifths left. How many pages were there in this book?

1 answer

2024-09-18 15:22

This book had: 39 + 2/5 = 39 + 06 = 406 pages. Because the number of pages in a book must be an entire number, the decimals needed to be rounded to the nearest whole number. Therefore, the book had a total of 40 pages.

Little Cong read a book and read 15 pages a day. After four days, there were still three-fifths of the book that he had not read. How many pages was this book?

1 answer

2024-09-15 14:43

Suppose the book has x pages: Little Cong read 15 pages a day for four days, a total of 4×15=60 pages. The total number of pages in the book is x, so: 60÷(1+3/5)=x÷5 The solution was:x=60×5 div3 =600 div3 =200 pages. Therefore, the book had a total of 200 pages.

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.

Xiao Ming has a book with a total of 240 pages. He has already read two-fifths of the book. How many pages are left?]

1 answer

2024-09-18 15:27

Xiao Ming had a book with a total of 240 pages and had already read two-fifths of the entire book, so he had already read 240 × 2/5 = 96 pages. Therefore, there were still 240 - 96 = 144 pages left.

Little Ming was reading a 30-page book, and he had already read two-fifths of it. How many pages were left?

1 answer

2024-09-18 15:33

Xiao Ming had already read two-fifths of a 30-page book, so there were 30 - 2/5 = 30 - 04 = 296 pages left. Therefore, there were 296 pages left in the book.

He had read two-fifths of a story book on the first day and one-fourth of the book on the second day. There were still 70 pages left. How many pages were there in the book?

1 answer

2024-09-18 15:21

Suppose the book has x pages. On the first day, he read two-fifths of the book, which was 2/5x pages. The next day, he read a quarter of the book, which was x/4 pages. Because there were still 70 pages left, there were: 2/5x + x/4 - 70 = 0 To simplify it: 5x/4 - 70 = 0 Solution: x = 400 Therefore, the book had a total of 400 pages.