The first is the tax issue.
It is the duty of citizens to pay taxes according to law. According to the provisions of China's tax law, the monthly salary and salary income of citizens does not exceed 929 yuan, and the part exceeding 929 yuan is the monthly taxable income. The tax is calculated cumulatively according to the following table:
Monthly taxable income tax rate
Not more than 5% of 500 yuan.
Exceeding 500 yuan to 2000 yuan 10%.
The portion exceeding 2,000 yuan to 5,000 yuan is 15%.
…… ……
Someone's salary this month 150 438+0 yuan. What is his salary this month?
Analysis: To solve this problem, we must first understand the meaning of the problem and look at the chart, from which we must understand that taxes are calculated and accumulated by sections. Because 500× 5%
500×5%+( -929-500)× 10%= 150. 1
Solution, =2680
That is, this person earns 2680 yuan this month.
Second, the issue of fares.
In May, a concert hall decided to hold a special concert for students during the summer vacation. Admission tickets are divided into group tickets and retail tickets, of which group tickets account for the total number of votes. If you buy tickets in advance, there will be different degrees of discount. May group tickets 12 yuan each, group tickets sold. Each retail ticket 16 yuan, * * * sells half of the retail tickets. If each group ticket is sold 16 yuan in June, and all the remaining tickets are planned to be sold in June, how much should retail tickets be priced to make the ticket revenue of these two months even?
According to the meaning of the question, you must
To solve this problem, you must:
A: The retail ticket for June should be 19.2 yuan each.
Third, the issue of sales profit.
Example 3 An enterprise produces a product, the cost of each product is 400 yuan, and the price is 565,438+00 yuan, and m pieces are sold this quarter. In order to further expand the market, the company decided to reduce the sales price by 4% in the next quarter, and expected the sales volume to increase by 10%. To keep the sales profit (sales price-cost price) unchanged, how much should the cost price of each product be reduced?
Analysis: The key to solve this problem is to understand the meaning of decreasing and increasing percentages. Assuming that the cost price of each product is reduced by X yuan, the reduced cost of each product is () yuan, and the sales price is 5 10( 1-4%) yuan. According to the meaning of the question,
[5 10( 1-4%)-()]( 1+ 10%)m =(5 10-400)m
X= 10.4 is obtained by solving.
A: The cost price of this product should be reduced by 10.4 yuan.
Fourth, the problem of scheme design.
A milk processing factory has 9 tons of fresh milk. If you sell fresh milk directly in the market, you can make a profit of 500 yuan per ton. Made into yogurt for sale, the profit per ton can reach 1200 yuan; Made into milk tablets for sale, the profit per ton can reach 2000 yuan. The production capacity of this factory is: if it is made into yogurt, it can process 3 tons a day; The processed milk tablet can be processed 1 ton every day; However, due to personnel restrictions, the two processing methods cannot be carried out at the same time, and due to temperature conditions, all milk must be sold or processed within 4 days. Therefore, the factory has designed two feasible schemes:
Option 1: make as many pieces of milk as possible and sell the rest directly;
Option 2: Make part of it into milk slices and the rest into yogurt for sale, which will be completed in exactly 4 days.
Which scheme do you think is the most profitable? Why?
Analysis: This problem seems complicated and has many restrictions, but it can be easily solved if it is decomposed into the total profit of Scheme I and Scheme II respectively.
If the scheme 1 is selected, the total profit =4×2000+(9-4)×500= 10500 (yuan).
If the second scheme is selected, it is assumed that X tons of yogurt and 9-x tons of milk slices will be processed within 4 days. According to the meaning of the question, you will get.
The solution gives x=7.5.
The total profit is1200× 7.5+2000×1.5 =12000 yuan.
Comparing the total profits obtained by Scheme I and Scheme II, it can be seen that Scheme II is more profitable.
Verb (abbreviation for verb) water conservancy
According to Beijing Daily, the per capita water resources in Beijing are only 300 cubic meters, which is only the national average and the world average. How many cubic meters of water resources is per capita in China? How many cubic meters of water resources is per capita in the world?
According to the meaning of the question, the solution is 2400 cubic meters and 9600 cubic meters.