1. Home appliances going to the countryside is an important measure for China to cope with the current international financial crisis, benefit farmers and strengthen agriculture, promote industrial production, promote consumption and stimulate domestic demand. According to the national regulations, farmers will get a subsidy of 13% of the sales price when they buy home appliances to the countryside. On May 1 this year, a shopping mall sold 20 mobile phones of some household appliances to farmers. It is understood that these 20 mobile phones were sold from a shopping mall.
A.B. C. D。
2. The unit price of this drink is less than that of this drink 1 yuan. Xiaofeng bought two bottles of this drink and three bottles of this drink. It took 13 yuan to buy a * *. If the unit price of this beverage is RMB/bottle, then the following equation is correct ().
A.B. C. D。
3. Zoo ticket price: 50 yuan for adults and 30 yuan for children. One day, the zoo sold 700 tickets and got 29,000 yuan. Suppose you sell X children's tickets, which of the following equations can be listed according to the meaning of the question? ( )
a . 30x+50(700-x)= 29000 b . 50x+30(700-x)= 29000
c . 30x+50(700+x)= 29000d . 50x+30(700+x)= 29000 .
Second, cooperation in asking questions and exploring new knowledge
Question 2:
According to Ningde. The success of the Third Cross-Strait Tea Expo in Ningde City has enhanced the popularity and market competitiveness of tea in eastern Fujian. In the first quarter of this year, the price per kilogram of tea green (newly picked tea) was 10 times that of the same period last year. Ye Liangliang, a tea farmer, planted tea trees due to frost this year. In the first quarter, the yield of tea green was 198.6 kg, which was 87.4 kg lower than the same period last year.
Question 3:
If a person finishes it alone, it will take 60 hours to sort out a batch of books. At present, some people spend an hour tidying up, plus 15 people to work with them for another two hours, just finishing tidying up. Assuming everyone's work efficiency is the same, how many people will arrange the ranking first?
Question 4:
A middle school plans to organize ninth grade teachers and students to hold a graduation party in Shaoshan. The following is a conversation between monitor Li and Xiao Fang and Xiao Ming about renting a car:
Teacher Li: "Ping An Passenger Transport Company has buses No.60 and No.45 for rent. The rent of bus No.60 is more expensive than that of bus No.45, 200 yuan. "
Xiao Fang: "The eighth-grade teachers and students of our school rented four 60-seat buses and two 45-seat buses to Shaoshan yesterday in this passenger transport company, and the rent was 5,000 yuan a day."
Xiaoming: "The five 60-seat and 1 45-seat buses rented by our ninth-grade teachers and students are just full."
According to the dialogue above, answer the following questions:
(1) What is the daily rent for 60 and 45 buses of Ping An Passenger Transport Company?
(2) According to the car rental scheme proposed by Xiaoming, how much does it cost for ninth-grade teachers and students to rent a car in this company for one day?
Third, independent induction, formation methods
Students' independent induction: how to solve problems with equations?
Consolidation exercise:
1. Please read the following poem: "There are crows, countless crows. Three live in a tree, five have nowhere to go, five live in a tree and one is idle. Please count carefully. What is the geometry of a crow? "In the poem, the crow is a bird and the tree is a tree.
2. When the price tag of a commodity is lost, the salesman only knows that "its purchase price is 80 yuan, and after it is sold at a 30% discount, it can still make a profit of 5%". Do you think the price that the salesperson should indicate on the tag is RMB?