2. Repair a section of road. The full length 1/4 was repaired on the first day, and 90 meters was repaired on the second day. At this time, there is still150m to be repaired. How long is this road?
There is a pile of yellow sand on the construction site, which is 23% used and just 60 tons used. How many tons is this pile of yellow sand?
4. Sound travels in the air for about 3 seconds 1 km, and the speed of light is about 300,000 km per second. What is the speed of sound?
5. A wheat experimental field, originally planned to produce 8 tons of wheat per hectare, actually produced several tons of wheat per hectare?
6. The staff canteen planned to burn 5 tons of coal in April, but actually burned 4.8 tons. What percentage was saved?
7.4250 kg of flour can be ground with 5000 kg of wheat to get the flour yield of wheat.
8. Wheat flour yield is 80%. How many kilograms of wheat does it take to grind 640 kilograms of flour?
9. There are 50 students in Class 6 (1), and one day there are two students on leave, so what is the attendance rate that day?
10, arbor day * * * planted a number of trees, 485 trees survived, 15 trees did not survive. Seek the survival rate of this tree planting.
1 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?
12. Two cars, A and 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 later, the distance between the two cars is still 37 kilometers.
13, master and apprentice * * * processed 208 machine parts, and the number of parts processed by master was four times that of apprentice. How many parts did the master and apprentice process respectively?
14. 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?
15, grade five, bought a batch of notebooks for three excellent students. If each student is awarded 5 copies, there are still 3 copies. 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?
16. There are 80 sheep on the hillside, among which the white sheep is four times that of the black sheep. How many black sheep and white sheep are there on the hillside?
17. 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)
18, trapezoidal wheat field, covering an area of 540m2, height18m, upper bottom 20m, and lower bottom 20m?
19. Two cars, A and B, set off from two places 750 kilometers apart at the same time, face to face and meet in five hours. Car A travels 80 kilometers per hour, and how many kilometers does car B travel per hour?
20. 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?
2 1, the students went for a spring outing, and there were already 45 people in the car; There are still four groups waiting for the next bus, each with 9 people. How many people went for a spring outing?
22.A * * * There are 150 people going for a spring outing, and 54 people have already left. The rest will be transported by two cars. How many people can each car carry on average?
23. There are 18 boys in the dance team, and the number of girls is twice that of boys. How many boys and girls are there in the dance team?
24. The students made flowers, Xiaojun made 63 flowers, and Xiaohong made 18 fewer flowers than Xiaojun. How many flowers did they make together?
25. I bought 25kg Chinese cabbage for the first time and175kg Chinese cabbage in the canteen for the second time. How much does it cost to buy Chinese cabbage in the canteen at 6 cents per kilogram?
26. Xiaohua showed Xiaogang a book. Xiaohua read 132 pages in 4 days and Xiaogang read 96 pages in 3 days. Who reads fast? Why?
27. Mom bought three T-shirts for Xiaoming, each 23 yuan. She paid the shop assistant 100 yuan. How much should she get back?
28. Sporting goods stores used to have 72 basketballs, but they sold 60 and bought 45. How many basketballs are there now?
29. The students visited the Observatory. There are nine girls, and the number of boys is three times that of girls. Is a 40-seat car enough?
30. There are 24 boxes of chess in the school activity room. The number of boxes of military flags is twice that of chess, and there are 12 boxes of checkers. How many boxes are there less than the flag?