Concrete analysis of specific problems of equal amount relationship

Example 3: A train runs from Station A to bilibili at a speed of 90 kilometers per hour, and a truck runs from bilibili to Station A at a speed of 75 kilometers per hour. After four hours of meeting, how many kilometers is the railway between Station A and bilibili?

1. The combined age of Party A and Party B is 29 years old. It is known that Party A is three years younger than Party B. How old are Party A and Party B?

2. The school library bought 240 story books, which is equivalent to three times of science and technology books. How many science and technology books did it buy?

3. The circumference of a rectangle is 240m, and its length is 1.4 times as wide. Find the area of a rectangle.

4. In triangle ABC, angle A is twice as big as angle B, and the sum of angles A and B is smaller than that of angle C 18 ... Find the degrees of the three angles. What triangle is this?

5. Guangshui Cinema has 32 rows of seats with an average of 38 people in each row; After the expansion, it increased to 40 rows, 584 more people than before. How many people can sit in each row on average after the expansion?

6. The height of floret 160 cm is higher than that of Xiaolan 15 cm. How many centimeters is Xiaolan tall?

7. There are 84 hectares of food crops in ji yang Village, which is more than four times of 2 hectares of cash crops. How many hectares of cash crops are there?

8. The canteen sent a batch of coal. It was originally planned to burn 2 10 kg per day, which can last for 24 days. This batch of coal can burn for 28 days after improving the furnace. Q: How many kilograms are saved on average every day compared with the original plan after improving the cooker?

9. Wang Lan has 64 photos, and Jiang Lei gave her 12. At this time, the number of photos of Wang Lan and Jiang Lei is equal. How many original photos of Jiang Lei are there?

10, the grain store shipped 480 bags of rice and flour, and the number of bags of rice was three times that of flour. How many bags of rice and flour were shipped?

1 1. Aunt bought four bars of soap and two towels to go to 2.8 yuan. It is known that each bar of soap is 0.26 yuan, and how much is each towel?

12. Grandpa is 7 1 years old this year, five years older than Xiaohua. How old is Xiaohua this year?

13. The distance between the two stations is 255 kilometers. A bus leaves from Station A and a truck leaves from bilibili. They meet 2.5 hours later. The bus speed is 48 kilometers per hour, and the truck speed is how many kilometers per hour?

14. It takes 15 days to transport a pile of soil and transport 36 cars every day. Now it needs to be transported five days in advance. How many more cars do you have to transport every day?

15, the average of three numbers is 13.5, A is four times that of B, and C is 4.5 more than A. What are these three numbers?

16. The circumference of a rectangle is 240m, and its length is 1.5 17 times its width. What is the area of this rectangle?

17. In triangle ABC, angle A is three times that of angle B, and angle C is greater than the sum of angle A and angle B 12 ... Find the degrees of the three angles.

18. The circumference of a triangle with a difference of 5 cm on each side is 120 cm. What is the shortest side? What is the longest?

19. In order to celebrate New Year's Day, Teacher Zhang led the students to make small red flowers. Teacher Zhang makes four more flowers per hour than Liu Ye. Teacher Zhang made 90 in three hours. How many red flowers do Liu Ye bloom every hour?

20. The store brought 500 Jin of fruit, including 8 baskets of apples, and the rest were pears, with 300 Jin of pears. How many kilograms does each basket of apples weigh?

2 1. There are 960 students in Dongjie Primary School, which is 12 times that before liberation. How many students were there before liberation?

22. There are 960 students in Dongjie Primary School, which is 26 less than 12 times before liberation. How many students were there before liberation?

23. The area of a triangle is 960 square decimeters, and its base is 40 decimeters. What is its height?

24. A basket of apples weighs 45.5 kilograms. After taking out half of it, it weighs 24.5 kilograms. How much does this basket weigh?

25. Use120cm long iron wire to form a rectangle. If its length is 38 centimeters, how many centimeters is its width?

26. Wang Ma bought 2 kilograms of apples and paid 5 yuan money. How much is a catty of apples to get back to 0.6 yuan?

27. The store delivered 8 baskets of apples and 10 baskets of pears, each weighing 820kg. Each basket of apples weighs 45 kilograms. How many kilograms does each basket of pears weigh?

The shop sent eight baskets of apples and pears, each weighing 724 kilograms. Each basket of pears weighs 46 kilograms. How many kilograms does each basket of apples weigh?

29. The school spent 476 yuan to buy back four volleyballs and five basketballs. How much is volleyball for each basketball 56 yuan?

30. The school spends more money on basketball than volleyball, 84 yuan. Buy back five basketballs, each 56 yuan, volleyball and each 49 yuan. How many volleyballs did the school buy back?