2. A machine plows 15 hectares in 3 hours. According to this calculation, how many hours does it take for five machines to plow 75 hectares?
There are 14 boxes of duck eggs in the shop. Sold 250kg, leaving 4 boxes and 20kg. How many kilograms are there in each box of duck eggs?
4. bright primary school donated books to mountain students, with 240 books in grade four, twice as many as in grade five, and more books in grade six than in grade five 120. How many books did he donate per grade on average?
The grain store delivered 20 bags of rice and 20 bags of flour, 90 kilograms of rice and 25 kilograms of flour each. How many kilograms more rice is brought in than flour? (Answer in two ways)
6. The length of the two ropes is 48.4 meters. After cutting 6.4 meters from the first rope, the second rope is 6 meters more than the remaining two of the first rope. How long are the two ropes?
7. Students in Grade Four and Grade Five collect tree species. In the fourth grade, they collected tree species 18.6 kg, and the fourth grade collected 2.5 kg less than the fifth grade. How many kilograms of tree species do the two grades collect?
8. A workshop used to consume 2450 kWh of electricity every month. After the energy-saving activities, the original electricity consumption for one year can now be increased by two months. How many kWh of electricity does this workshop save on average every month?
9. The students took part in tree planting activities. There are 96 students in Grade Four, each of whom planted 3 trees. There are 87 students in Grade Five, each of whom planted 4 trees. How many more trees were planted in the fifth grade than in the fourth grade?
10. The scores of six students in the first group in the math exam were 86, 79, 98, 100, 89 and 94 respectively. What is their average score?
1 1. A car travels for 3 hours 135km, and the speed of the plane is 28 times that of the car, which is 60km less. How many kilometers does this plane fly per hour?
12. A clothing factory produced 850 suits in five days. According to this calculation, how many suits are produced a month? (30 days a month)
13. The store delivered 8 baskets of apples, 12 baskets of pears, with 38kg apples and 42kg pears in each basket. How many kilograms of fruit did this shop send?
14. A construction site needs 240 tons of cement, which will be transported by five vehicles. Each car carries 3 tons at a time. How many times does it take to transport it? (There are two comprehensive solutions)
15. The distance between Party A and Party B is 750km. How many hours can a car travel at 50 kilometers per hour to reach Party B? (List the equations with unknowns and solve them again)
16. Xiaohua, Xiaolin, * * have 120 pencils, and Xiaogang and Xiaohong * * * have 20 pencils. How many pencils do they have on average?
17. A primary school needs to water 620 trees in the third and fourth grades. In the third grade, 40 trees should be watered every day for 8 days. The rest will be watered in the fourth grade. How many trees will be watered every day after five days?
18.3 loom weaves 336 meters in 4 hours. According to this calculation, how many meters does 1 loom weave in 8 hours? The distance between Party A and Party B is 560 kilometers. One car travels from Party A to Party B at a speed of 48 kilometers per hour, and the other car travels from Party B to Party A at a speed of 32 kilometers per hour. How many kilometers apart are the two cars five hours after they leave the two places?
19. A section of highway was originally planned to be completed in 20 days. Actually, it was built 45 meters more than originally planned, and the task was completed five days ahead of schedule. How many meters was originally planned to be built every day?
About 140 babies are born every minute in the world. About how many babies are born every hour?
2 1. Zhuanglin has a rectangular garden, which is120m long and 50m wide. What is the area of this garden?
22.3 The same truck carries 162 tons of apples, and each truck carries 6 tons at a time. How many times do these trucks need to carry apples?
23. A fairy tale has 165 pages, and Xiaohong read 60 pages in the first four days. According to this calculation, how many pages can you read in 7 days? How many days does it take to finish this book?
There used to be more than 600 kilograms of rice in the canteen. After eating for 4 days, there are still 340 Jin left. How many kilograms do you eat on average every day?
25. Li Xiaolin reads a story book. If you read 12 pages every day. 15 days just ended. If you want to read it in 10 days, how many pages do you need to read on average every day?
26. Young Pioneers from a primary school lined up to perform. There are 25 people in each column, which can be arranged in 12 columns. If each column is reduced by 10, how many columns can it be arranged?
27. Road builders repaired 950 meters in 25 days. According to this calculation, how many days will it take to repair the remaining 760m?
28. A corridor is 24 meters long. Put a pot of flowers every 3 meters. How many pots should I put at one end? Put flowerpots at both ends. How many flowerpots?
29. Four or five grades should plant 120 trees. There are 3 classes in Grade Five, and 28 trees are planted in each class. The rest are assigned to four classes in grade four. How many trees are planted in each class on average? Fill in the form and then answer.
30. The vegetable market delivered 120 baskets of radishes and10 baskets of cabbages, each with 40 baskets of radishes and 35kg of cabbages. How many Jin of radish and cabbage are shipped? How many kilograms is radish less than cabbage?
There used to be 64 chairs in the classroom, but now 28 chairs have been removed. The rest of the chairs are arranged in four rows. How many chairs are arranged on average?
32. If a piece of wood is sawed into 6 sections, it will take 15 minutes, and if it is sawed into 12 sections, how many minutes will it take?