Little Fatty was reading a book. He had already read half of the book, but three pages were missing. There were still 90 pages left. How many pages were there in this book?

2024-09-16 11:05

1 answer

2024-09-16 15:13

Lil 'Fatty had already read half of the book. Three pages were missing, which meant 1/2 - 1/2 + 3 = 2/3 pages. Therefore, Lil 'Fatty had already read 2/3 of the pages and there were still 90 pages left. This meant that the book had a total of 90/2/3 = 90/3 = 300 pages. Therefore, the book had a total of 300 pages.

Xiao Lin was reading a book. He had already read 180 pages, and there were still 5/6 left. How many pages is this book?

1 answer

2024-09-15 14:33

This book had a total of 180 + 5/6 = 195 pages.

He had already read three-quarters of the book and there were still twenty-four pages left. How many pages were there in the book?

1 answer

2024-09-10 17:44

He had already read 3/4 of the book, which was 1/2 of the pages, so the remaining pages should be twice the number of pages in the book, which was 24 pages. The total number of pages in the book = 1/2 × 120 pages. Therefore, the book had a total of 120 pages.

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

1 answer

2024-09-07 17:18

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

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.

There were 360 pages in a science book. Little Ding Ding had already read more than half of the pages. How many pages were left?

1 answer

2024-09-16 11:11

Little Ding Ding had already read more than half of the pages, so there were still 360 - 10 - 50 = 190 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.

Xiao Ming was reading a storybook. He had already read 40% of the book, and there were still 90 pages left. How many pages does this book have?

1 answer

2024-09-16 10:55

This book has a total of $90+40%<<20>>= 1620$pages. Of which, 40% of the pages were already read by Xiao Ming, and the remaining 90 +80=170 pages were unread.

Xiao Ming was reading a storybook. He had already read 40% of the book, and there were still 90 pages left. How many pages does this book have?

1 answer

2024-09-16 10:50

This book has a total of $90+ 40%$ $×$pages. Substituting 40% into the above formula: $90+04×$ $×$pages = $90+04×$ $×$ (100-90) = $90+04×$ $× $10 = $90+04×$ $× $100 = $90+40=130$pages Therefore, the book had a total of 130 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.

Zhang Ming was reading a storybook. He read 30 pages a day. After three days, there were still 8 pages of the book left. How many pages were there in this storybook?

1 answer

2024-09-16 18:02

Let's say this storybook has a total of $x$pages. According to the topic, 30 pages per day meant $30/div2 = 15$per hour. Zhang Ming read $15$pages per hour in $3$days so he read $3/30 = 90$pages in total. The remaining pages are $8/5 of the book, so there are: $$ 90 - \frac{8}{5} = \frac{16}{5} $$ Because the question requires the number of pages in the book, you need to multiply this result by $x$pages to get: $$ x \times \frac{16}{5} = \frac{16}{5} \times x = 96 $$ Solve this equation to get $x = 56$. So this story book had a total of $56$pages.