2. It took 16.5 yuan to buy three pens. How much should it cost to buy the same five pens?
Class 3.4 1 bought two ropes 10m long to jump rope. A rope is 1.4m long. How many can you make at most?
4. 24 bags of milk per box, ***40.8 yuan; 22 bags of B milk per box, ***35.2 yuan, which is cheaper? How much is a pack cheaper?
A chicken farm has to transport 322kg eggs. If each wooden box can hold at most 15kg of eggs, how many such wooden boxes do you need?
6. In the 30 years of reform and opening up, China's financial expenditure on education increased from 7.505 billion yuan in 1978 to 71223.2 billion yuan in 2007. How many times has it increased? (Numbers are reserved as integers)
7. parallelogram wheat field, with a base height of 2 15m and a height of 17m. How big is this wheat field? How many kilograms of wheat are harvested on average per square meter?
8. Planting sunflowers in a parallelogram field with a bottom length of 90m and a height of 60m, if each sunflower covers an average area of 0.25m? How many sunflowers can this land grow?
9. The perimeter of the parallelogram iron sheet is 82cm, the length of a base is 16cm, and the height of this base is 20cm. What is the height of the other base?
1 1. The base of the triangle is 16 decimeter, which is 4 decimeters longer than the height. What is the area of this triangle?
12, a triangular wheat field, bottom 26 meters, height 13 meters, * * * 507 kg of wheat, how many kg of wheat per square meter on average?
13. A triangular billboard with a base of 2.8m and a height of1.8m.. If you need 0.48 kg of paint per square meter, how many kg of paint do you need to paint the front of this billboard? (Numbers are reserved as integers)
15, two right angles of a right triangle are 3cm and 4cm respectively, the hypotenuse is 5cm, and the height on the hypotenuse is.
How many centimeters?
17, a trapezoidal wheat field with an upper bottom of 35 meters and a lower bottom of 25 meters, with an area of 1 140 square meters and a height of how many meters?
18, a trapezoidal steel plate, with an upper bottom of 45 cm, a height of 28 cm, an area of 980 cm 2, and a lower bottom of how many cm?
20. Car A travels from place A to place B for 3.2 hours, with an average speed of 95 kilometers per hour; It took 3.8 hours to get from B to A, and how many kilometers per hour did you travel on average?
2 1, the school bought 700 books and planned to put them back in cartons. It is known that each container can hold at most 1 10 copies. How many cartons do you need to prepare?
22. This clothing factory makes a man's coat out of 2.5 meters of cloth. Now there are 42 meters of cloth. How many such men's coats can it make?
23. Grandma needs 0.85 meters of silk rope to knit a Chinese knot. Now there is 30 meters of silk rope. How many Chinese knots can she knit at most?
How many kilograms of soybean milk can be squeezed from 24.50 kilograms of soybeans and 120 kilograms of soybeans?
25. A car will drive from City A to City B at a certain speed, and it will take five hours to arrive. 3.5 hours after the bus leaves from City A, it is still 90 kilometers to City B. How many kilometers is it from City A to City B?
26. A rectangular food bag is 0.3 meters long and 0.2 meters wide. How many square meters of cloth do you need to make these 450 food bags?
27. Mom and Dad took Lan Lan (the height of Lan Lan is1.3m) to visit the Great Wall. One-way fare 12.4 yuan/person,1children under 0.4m are half price. Dad bought a round-trip ticket for three people. He paid the conductor 100 yuan. How much should he get back?
29. In the sports meeting for the elderly, Liu took part in the long-distance race, covering a distance of 1.5 km and taking 9.7 minutes, and won the first place. Li spends 2 minutes more than Liu. How many minutes does Li Run 1 km take on average?
30. Xiaoming buys 3kg pears and 3kg apples * * and pays 20. 1 yuan, while Xiao Fang buys 1kg pears and 3kg apples * * and pays 15. 1 yuan. How much are apples and pears per kilogram?
3 1, Xiaojun's car consumes 7 liters when driving 90 kilometers, and the bright car drives 1 1 liter. Whose car has low fuel consumption? (The number shall be kept to one decimal place)