1. The sales of Zhong Bai Warehouse in the first quarter of this year was 2.7 million yuan, and the sales in the second quarter increased by 20% compared with the first quarter. What is the sales volume in the second quarter?

270×( 1+20%)

=270× 1.2

= 3.24 million yuan

2. During the 11th period, all the books in Xinhua Bookstore were 25% off. Why are 100,000 books 15 yuan? How much are 20 100,000 books?

15×20×85%

=300×85%

=255 yuan

3. To build a 2500-meter-long road, Team A built 40% of the total length and Team B built 36% of the total length.

Question1; How many meters did Team A repair?

2500× 40% =1000m

Question 2; How many meters did Team B repair?

2500×36%=900 meters

Question 3; How many meters did Team A repair more than Team B?

2500×(40%-36%)

=2500×4%

= 100 meter

Question 4; How many meters are left to be repaired? Every question in this problem should be calculated comprehensively.

2500×( 1-40%-36%)

=2500×24%

=600 meters

4. The original price of a book is 80 yuan, with a price increase of 25%. What's the current price?

80×( 1+25%)

=80× 1.25

= 100 yuan

A book has 240 pages, of which 20% has been read. How many pages have you missed?

240×( 1-20%)

=240×80%

= 192 page