A math club has a secret way of keeping accounts. When the income is 360 yuan, it is recorded as + 200 yuan. When the income is 120 yuan, it is recorded as - 40 yuan. If the expenditure is 300 yuan, How do you keep accounts? How did you find out the secret?

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• 1. Party A's current deposit is 600 yuan and Party B's current deposit is 2000 yuan. From this month, Party A will deposit 500 yuan and Party B will deposit 200 yuan, List the functional relationship between the deposit amount of Party A and Party B Y1 Y2 and the monthly deposit X Yuan, draw the function image, and talk about the points that Party A and Party B have passed?
• 2. A: 15000 yuan a year, then 2000 yuan a year, B: 7000 yuan a year, then 600 yuan a year. Which income is higher? I'm very sleepy. I have to work out the formula Can we compare year by year
• 3. Xiao Li deposits 600 yuan and Xiao Wang deposits 2000 yuan. Starting this month, Xiao Li deposits 500 yuan and Xiao Wang deposits 200 yuan, In the first few months, Xiao Li's savings can surpass Xiao Wang's
• 4. At the beginning of last year, a's deposit was three times that of B. at the beginning of this year, compared with the beginning of last year, a had 500 yuan more and B had 2000 yuan more. At this time, a's deposit was two times that of B. at the beginning of this year, how many yuan did a deposit this year and how many yuan did B deposit?
• 5. Party A and Party B deposit 500 yuan and 800 yuan in the bank. After that, Party A deposits 50 yuan and Party B 120 yuan each month, and Party B deposits a few months later When Party A and Party B deposit in the bank, Party A will deposit 500 yuan and Party B will deposit 800 yuan. Then Party A will deposit 50 yuan and Party B will deposit 120 yuan every month. After a few months, Party B's deposit will be twice as much as Party A's?
• 6. Party A and Party B deposit in the bank, 500 yuan for Party A and 880 yuan for Party B. after that, 50 yuan for Party A and 120 yuan for Party B every month. After a few months, the deposit of Party B is twice that of Party A?
• 7. Set up an equation to solve the problem: after a deposit of 500 yuan in the bank and 880 yuan in the bank, a deposit of 50 yuan a month and a deposit of 120 yuan a few months later, B deposit is twice as much as a deposit
• 8. How to calculate the average monthly salary of the employees in the previous year? How to calculate the average monthly salary of employees in the previous year when reporting the individual payment base of social security? If it is 2011 now, is the average salary of employees in the previous year calculated by dividing the total salary of employees from January to December 2010 by 12 months?
• 9. Please write a sentence by listing numbers, giving examples, making comparisons and analogy I'll hand it in tomorrow! Don't write too long, write well,
• 10. Write sentences by listing numbers and making comparisons Write each sentence with a number and a comparison, and the two methods appear in the same sentence For example, a whale weighing nearly 40000 kg was found in China, about 17 meters long, with a tongue as heavy as dozens of fat pigs
• 11. A math club has a secret way of accounting, when the income of 300 yuan is recorded as - 240 yuan, when the use of 300 yuan is recorded as + 360 yuan, guess, when they use 100 yuan How much is it possible to record? Why?
• 12. Xiao Ming deposits 1000 yuan in the bank and takes out 500 yuan to donate to the disaster area one year later. Then he deposits the remaining 500 yuan and the due interest one year at a fixed time. If the annual interest rate of the deposit remains unchanged, he can take out 660 yuan in the later period and ask for the annual interest rate
• 13. Honghong family, water and electricity cost 500 yuan, the total expenditure of 1000 yuan, accounting for a few percent of the total expenditure
• 14. Xiao Ming's monthly living expenses are 1000 yuan and education expenses are 500 yuan, which account for two fifths of the total income, and how much of the total income does education expenses account for
• 15. Xiaoming's monthly living expenses are 1000 yuan and education expenses are 500 yuan. They account for 5 / 2 of the total income. How much of the total income does education expenses account for? Answer up to 8:30 this evening
• 16. There is a "secret" accounting method in the kingdom of mathematics. When they earn 300 yuan, it is recorded as - 240 yuan; when they spend 200 yuan, it is recorded as + 260 yuan June 8 expenditure 100 yuan, 20 account - 1200 yuan ① How much should be recorded in the account on June 8? Please explain the reason ② What is the actual revenue and expenditure on June 20?
• 17. A factory has a secret way of accounting. When they earn 300 yuan, it is recorded as - 240 yuan; when they use 300 yuan, it is recorded as 360 yuan. Guess how much yuan they may record when they use 100 yuan? When they earn 100 yuan, how much is it? Give me your reasons
• 18. A math club has a secret way of accounting, when the income of 300 yuan is recorded as - 240 yuan, when the use of 300 yuan is recorded as + 360 yuan How do they remember when they earn 100 yuan and when they spend 100 yuan? Writing rules thank you
• 19. A math club has a secret way of keeping accounts. When the income is 500 yuan, it is recorded as - 440. When the income is 200 yuan, it is recorded as + 260. Guess it, when they are in charge When they earn 50 yuan, how much is it? When they earn 80 yuan, how much is it? Tell me your reason
• 20. A math club has a "secret" accounting method. When they use 300 yuan, it is recorded as - 240; when they earn 300 yuan, it is recorded as + 360 Guess, when they use 100 yuan, how much is it? When they earn 100 yuan, how much is it? Explain your reason