Who gave me 50 to simple disjunctions,

123+256= 523+597=

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1. On the first day of the solution of the equation calculation problem with the answer, as much as possible
2. A workshop can make 500 class a parts or 250 class B parts every day, and each class A and class B parts will form a set of products. Now, if we want to make the most complete set of products within 30 days, how many days should each class A and class B parts be made?
3. An applied problem of equation in grade one of junior high school According to the diagram, one triangle needs three matchsticks, and two triangles need five matchsticks. Let's build n triangles. How can you express the number of matchsticks needed by N triangles with the algebraic formula of N? Now there are 2009 matchsticks. How many such triangles can you build? 2100? (list the equation and solve it, without listing the process,
4. Ask for an application problem of equation in grade one of junior high school Suppose that the average speed of a is x km per hour and that of B is y km per hour 2.5x=2.5y+8 (1) x+y=8 (2) From (2), x = 8-y Substituting (1) into the solution, y = 2.4 x=5.6
5. Ask an applied problem of the equation of grade one in junior high school Xiao Ming goes to school by Zhang Mi's house. The distance between them is 2km. Wang Hua takes 10 minutes less to go to school by bike than Zhang Mi does by foot. If Wang Hua's speed is 15km / h and Zhang Mi's speed is 6km / h, how long does it take each of them to go to school? Be sure to use the equation solution!
6. Junior one application problems, not necessarily with the equation solution Zhang Qiang deposits 2000 yuan and 1000 yuan in the bank in two forms, and withdraws them after one year. After deducting the interest income tax, he can get 43.92 yuan of interest. It is known that the sum of the interest income tax of the two deposits is 3.24%, and how much is the annual interest rate of the two deposits (interest tax rate is 5%)
7. The application of equations, Under the same field management and land conditions, the yield per unit area of Yujiang No.1 and Yujiang No.2 is 20% lower than that of No.1, but the rice of No.2 is better and the price is higher than that of No.1. The national purchase price of No.1 is 1.6 yuan / kg Q: when the national purchase price of rice No. 2 is what, the benefits of planting rice No. 1.2 in two fields with the same soil quality and area under field management are the same?
8. The application of column equation This year, the age sum of her parents is seven times that of Xiaofang. In another 10 years, the age sum of her parents will be four and a half times that of Xiaofang. How old is Xiaofang this year? Solving practical problems with a series of equations in the first year of junior high school It's better to have a process
9. Application of equation in grade one of junior high school, Monthly water consumption yuan / m3 The part not exceeding 6 cubic meters is 2 yuan / cubic meter The part exceeding 6 cubic meters but not exceeding 10 cubic meters is 4 yuan / cubic meter The part exceeding 10 cubic meters is 8 yuan / cubic meter (table above) If the household shared 15 cubic meters of water in March and April (the water consumption in April exceeded that in March), and paid a total water fee of 44 yuan, how many cubic meters of water did the household use in March and April?
10. Application problems of the first series of equations in elementary school (solving process) Class 1 of Grade 7 first arranged 35 people to clean up, 15 people to pull the grass, and then 10 more people to support them. As a result, the number of cleaning people is twice that of pulling the grass. How many people are there to support cleaning and pulling the grass?
11. A simple calculation problem A simple method to calculate the problem, I want to take off the formula Oh! 101 times 99 minus 199 thank you very much!
12. Grade 5 Volume 1 300 calculation questions
13. 5x + 8 (10-x) = 62. Write a practical problem and answer it
14. According to 30 / X-30 / 1.5x = 1, please write a practical problem closely related to life
15. In connection with the actual life, write an application problem, so that the equation is 75 / x = 90 / X-5
16. In connection with the actual life, make up a practical problem, so that the equation listed is 90 / x = 130 / x + 20
17. Solve equation 5.5x = 11 and verify it Solve the equation and verify it
18. How to solve the equation with 3.5x-7.5 = 11
19. X + 1 / 2-5 / 6 x = 4 / 5
20. How to solve the equation 4.25 + 1.5x = 6.5