1. My mother deposited 60,000 yuan in the bank for a fixed period of one year with an annual interest rate of 2.25%. A year later, my mother got back () yuan from the bank.

2. There are 30 boys and 28 girls, and the number of girls is (), the ratio of girls to boys is (), the ratio of boys to girls is (), the ratio of boys to total numbers is (), and the ratio of total numbers to girls is ().

3. The number of A is twice that of B. A is () A, 50% B, 100% C, which is 200% more than B.

4. The salt content of a brine is 10%, and the ratio of salt to water is (). a、 1: 10 B、 1: 1 1 C、 1:9

5. Walter WANG deposited RMB 10000 in the bank for a fixed period of 3 years, with an annual interest rate of 2.7%. When due, how much principal and interest should Wang Gang get? 4. The school distributed 200 seedlings, the teacher planted 10%, and the rest were distributed to Class A, Class B and Class C at 5: 4: 3. How many trees are classified as C?

6.0.8×[7.9-(2+5)] 0.64×25×7.8+2.2 (3 1.8+3.2×4)÷5 194-64.8÷ 1.8×0.9

7. Uncle Zhang has raised 200 geese, and the number of geese belongs to ducks. How many ducks do you have? Uncle Zhang has raised 200 geese, the number of which is less than that of ducks. How many ducks do you have? 3.37.9 Subtract 5 times of 3.8 and divide the difference by 0.9. What is the quotient? 4. Three times a number minus half of 12. 12 equals 10.44. Find this number. 5,4.6 Subtract the product of 1.2 and 1.5, and divide the difference by 3.5. What is the quotient? 6. The number of A is 3.5 times that of B, and the sum of A and B is 5.4. What are the numbers a and b?

Uncle Ba deposited 2000 yuan in the bank for 2 years, with an annual interest rate of 2.70%. How much interest tax does Uncle Zhang have to pay after tax? How much money can Uncle Zhang get in the end?

9. There are 20 questions in a math contest, and he gets 5 points for each correct answer. If he answers a wrong question, he will not only get no points, but also deduct 2 points backwards. Xiaoming got 86 points in this competition. Q: How many questions did he answer correctly?

10. Two cars, A and B, set off from two stations at the same time and walked in opposite directions. Five hours later, they met on the road. The speed of car A is 85km/h, car B is 80km/h, and car B stops on the way1.5h.. How many kilometers is it between the two stations?