Xiaoqiang read a story book. It is known that he read 1 / 3 of the whole book on the first day, 3 / 10 of the rest on the second day, and then read 14 pages every day for five days After reading, how many pages are there in this book? It has to be 90 pages emergency
So this book has 90 pages
On the first day, I saw 1 / 3 of them,
The next day I saw the remaining 3 / 10, the formula: (1-1 / 3) × 3 / 10
If the total proportion is 1, then the remaining proportion after two days is: 1-1 / 3 - (1-1 / 3) × 3 / 10, which is the proportion of the following three days
Total number of pages viewed in the next three days: 14 × (5-2)
Use the total number of pages read in the next three days / the proportion read in the next three days = the number of pages in the whole book
A story book has 16 pages. Xiaohua said that I read 1 / 80 of the whole book on the first day. He read the remaining 1 / 5 on the second day. How many pages did Xiaohua read on the second day
160 pages, one eighth
The next day I read 160x (1-1 / 8) X1 / 5 = 160x7 / 8X1 / 5 = 140x1 / 5 = 28
Xiaohua read a story book, the first day read 30 pages, the next day read the remaining quarter, there are 60 pages left. How many pages of this book?
It's better not to use equations
NEXT: Li Li read a 96 page story book. On the first day, he read one eighth of the book. He asked: what page should I read the next day? Li Li read seven sixths of the first day the next day. How many pages did she read the next day? How many more pages did she read than the first day?