2. It takes 7 minutes. Make a birthday cake with 5 grams of cream and 250 grams of flour. One day, the bakery used 90 grams of cream. According to this calculation, how many kilograms of flour was used?
There are 200 literary books in the school library, which is just 2.5 times the number of science and technology, and story books are 8 times that of literary books. How many are these three books?
4. A car travels 60 kilometers in 0.75 hours, and travels at this speed for another 4.5 hours. How many kilometers did you walk before and after?
5. String some beads according to 2 red, 3 white and 6 black to make a string of 200 beads. What color is the last bead? How many red, white and black beads are there?
6. Two poplars and three camphor trees were planted on one side of the road, and a total of 90 camphor trees were planted. How many poplars have been planted? What if a * * * planted 88 camphor trees?
7. How many different ways can you form a rectangle with a length and width of 30 meters? What is the largest area in square meters?
8. There is a math, Chinese, English and moral book in the schoolbag. Take out one or several books at will. A * * * How many different results are there?
9. Thirty-four students are playing table tennis singles and doubles, just using 12 table tennis tables. Can you figure out how many tables there are in table tennis singles and doubles?
10, the radio and TV station is the platform shared by 1 bus and No.2 bus. 1 bus stops at the platform every 12 minutes and No.2 bus stops at the platform every 15 minutes. At 7: 20 in the morning, two buses stopped at the same time. When is the next stop at the same time?
1 1. The school organized 348 students to go for a spring outing and prepared to rent 48-seat and 36-seat cars. How can I rent a car without a room?
12. laying underground cables on Zhongyuan road, 34 meters have been laid, and 250 meters have not been laid. How long is this cable?
13. Repair a section of road. On the first day, the whole length 1/4 was repaired, and on the second day, it was 90 meters. At this time, there is still150m left. How long is this road?
14. Sound travels in the air about 1 km for 3 seconds. The speed of light is about 300,000 kilometers per second. What is the speed of sound?
15, a wheat experimental field, originally planned to produce 8 tons of wheat per hectare, how much wheat did it actually produce per hectare?
16, the staff canteen planned to burn 5 tons of coal in April, but actually burned 4.8 tons of coal. What percentage was saved?
17, 4250 kilograms of flour can be ground with 5000 kilograms of wheat, and the flour yield of wheat can be obtained.
18, the flour yield of wheat is 80%. How many kilograms of wheat does it take to grind 640 kilograms of flour?
/kloc-Class 0/9 and Class 6 (1) have a total of 50 people, two of whom take a day off. What was the attendance rate that day?
20. On Arbor Day, * * * planted a batch of trees, and 485 trees survived, but none survived 15 trees. Seek the survival rate of this tree planting.
2 1. Miss Wang went to the sporting goods store and bought five small footballs. She paid 100 and got back 32.5. How much is each small football?
22. Two cars, Party A and Party B, leave from two places 255 kilometers apart at the same time. Car A travels 52 kilometers per hour and car B travels 57 kilometers per hour. A few hours have passed, and the distance between the two cars is still 37 kilometers.
23. The master and the apprentice * * * processed 208 machine parts, and the number of parts processed by the master was four times that of the apprentice. How many parts did the master and the apprentice each process?
24. Wang Fang's deposit is 2.2 times that of Li Li. If Lili deposits 75 yuan in the bank again, the deposits of the two people will be equal. How much did each of them save?
25. In the fifth grade, buy a batch of notebooks for miyoshi students. If each student is awarded five books, there are still three books. If each person sends 6 copies, it will be less 12 copies. How many "three good" students did you choose in the fifth grade? How many notebooks did you buy?
There are 80 sheep on the hillside, among which the number of white sheep is four times that of black sheep. How many black sheep and white sheep are there on the hillside?
27. Two baskets of oranges were sold in the shop. The first basket weighs 26 kilograms and the second basket weighs 29 kilograms. The second basket sold 9 yuan more than the first one. What is the average price of oranges? (Solve in two ways)
28. A trapezoidal wheat field, covering an area of 540 square meters, with a height of18m, an upper bottom of 20m and a lower bottom of 20m?
29. Two cars, A and B, set out from two places 750 kilometers apart at the same time and met face to face for five hours. Car A travels 80 kilometers per hour, and how many kilometers does car B travel per hour?
30. Two cars leave from the same place at the same time. After driving for 4.5 hours, car A lags behind car B 13.5 km. It is known that car A travels 35 kilometers per hour. How many kilometers does bus B travel per hour?