1, Grade 6 students collected 180 cans, of which 1/3 was collected by Class 1 and 2/5 by Class 2. How much do you charge for each class? (60、72)

2. Xiaohong weighs 42kg, Xiaoyun weighs 40kg, and the weight of Xiao Xin is equivalent to 1/2 of the total weight of Xiaohong and Xiaoyun. How much does Xiao Xin weigh (4 1)

Students from three classes in Grade Six help the library to make up books. Class one has repaired 54 books, class two has repaired 5/6 of class one, and class three has repaired 4/3 of class two. How many repair books are there in Class Three? (60)

4. Xiaoli has more 12 color pictures than Xiaolan, which is exactly equivalent to 3/ 10 of Xiaolan's pictures. How many color pictures does Xiaolan have? How many sheets does Xiaoli have? (40、52)

5. There are11students in the sixth grade, which is equivalent to 3/4 of the students in the fifth grade. How many people are there in the fifth and sixth grades? (259)

6. Xiao just bought a bag of flour and ate 15 Jin, which is exactly 3/4 of this bag of flour. How many kilograms is left in this bag of flour? (20)

7. There are 30 people in bright primary school Art Group, biology group13 and model airplane group 4/5. How many people are there in the model airplane group? (8)

8. There are 2400 geese on a farm. The number of geese is 3/4 of that of ducks, and the number of ducks is 4/5 of that of chickens. How many chickens are raised on the farm? (4000)

9. Five students have the same amount of deposits. If each student donates 16 yuan to Project Hope, the money left by five students is exactly equal to the original three people's deposits. What is the initial deposit per person (40 pounds)

The following is for reference.

(2)

1. A cuboid bunker is 4m long, 2m wide and 0.5m deep. If the yellow sand weighs 1.4 tons per cubic meter, how many tons does it weigh?

2. A cuboid with a bottom area of 30 square decimeters and a height of 3 meters. How many cubic decimeters is its volume?

Our school will paint the classroom, which is 8 meters long, 7 meters wide and 3 meters high. After deducting the area of doors, windows and blackboards, it is known that 5 yuan painting costs per square meter. How much does it cost to paint a classroom?

A commodity box is a cube with a side length of 6 cm. What is the maximum area of a box with a trademark?

5. How many cuboid blocks with a length of 8cm, a width of 12cm and a height of 5cm can be sawed into cubes with a length of 2cm?

6. A rectangular piece of wood with a square bottom is 5 meters long. Cut into 4 sections to increase the surface area by 36 square meters. What is the volume of this cuboid?

7. A rectangular iron plate with a length of 40 cm and a width of 30 cm, the four corners are cut into squares with a side length of 4 cm, and then welded into a box without a cover. How many liters is its volume?

8. As we all know, a rectangular tin tank with a length of 18 decimeter and a width of 10 decimeter can hold 1620 liters of water. How deep is this tank?

9. Rectangular plastic box with liquid medicine, 0.6m long, 0.25m wide and 0.5m deep. If you put the whole box of medicine into a small bottle with a capacity of 400ml each, how many bottles can this box hold at least?

10, a cubic billet is 6 decimeters long and forged into a square cuboid steel with a cross section of 3 centimeters. How many meters is steel?

1 1. A cuboid oil drum with a bottom area of 18 square decimeter can hold 43.2 kilograms of oil. If each liter of oil weighs 0.8 kg, what is the height of the oil drum?

12. In a glass jar with a length of 25 cm and a width of 20 cm, there is a cubic iron block with a length of 10 cm. At this time, the water depth is 15 cm. If the iron block is taken out of the jar, how many centimeters is the water depth in the jar?

13, a cuboid oil tank with a square bottom and a side length of 6 decimeters measured from the inside. It contains 144 liters of oil. As we all know, the depth of the oil inside is half that of the oil tank. How many decimetres is this oil tank?

14. One room 1200 wooden floor, 40 cm long, 20 cm wide and 2 cm thick. How many square meters is this room? How many cubic meters of wood does it take to spread out this room?

15 ... It takes 1000 to pave an auditorium with rectangular bricks with a length of 0.2m and a width of 0.1m.. How many bricks do you need if you use 0.0 1 m2 square bricks instead?

16. Make an uncovered cuboid oil drum with iron sheet. The length and width are 4 decimeters and the height is 6 decimeters. How many square decimetres is the iron sheet? Put gasoline in a barrel, and each liter of oil weighs 0.82 kg. How many kilograms of gasoline can this barrel hold?

17, there are 24 students in Class 3, Grade 5 in Shengli Primary School who meet the standard, and the number of students who fail to meet the standard 12. What percentage of students in this class have reached the standard?

18, there are 83 students in Class A and Class B, 86 students in Class B and Class C, and 85 students in Class C. How many students are there in each class?

19, 2 cows and 4 sheep graze 27kg a day, 6 cows 15 sheep graze 90kg a day, 1 cow 1 sheep graze how many kilograms a day?

20, 4.5 liters of oil, 3.5 liters of milk * * * weighs 7.88 kilograms, and 3 liters of oil and 3 liters of milk * * * weighs 5.94 kilograms. How many kilograms is a liter of oil and a liter of milk?

2 1, 4 basketballs and 3 volleyballs * * cost14/kloc-0 yuan, 5 basketballs and 4 volleyballs * * cost 180 yuan. How much is basketball and volleyball each?

22. There are 10 red balls, black balls * *, 7 red balls, white balls * *, and 5 black balls * * *. How many balls are there in each of the three kinds?

23. There are three people, A, B, C, A walks every minute 120m, B walks every minute 100m, and C walks 70m every minute. If three people start from the same direction and walk along a circular runway with a circumference of 300m at the same time, how many minutes can they meet again?

24. Party A, Party B and Party C borrow books from the library. Party A comes every six days, Party B comes every eight days and Party C comes every nine days. If we meet in the library on March 5, when will we go to the library next time?

25. The fifth-grade students in bright primary school are divided into groups of 786, all of whom have just finished their studies. How many students are there in Grade Five?

26. A car traveled192km in the first 3 hours and 58km/h in the last 2 hours. What is the average speed of this car?

27. A bottle of oil weighs 3.4 kilograms. Half of it is used, and the bottle weighs 1.9 kg. How many kilograms does the bottle weigh like crude oil?

28. Gardeners planted a tree every 4 meters on both sides of a highway, and planted 74 trees in a row. Now it's time to plant a tree every 6 meters. So, how many trees don't need transplanting?

three

1.The distance between A and B is 420km, and a bus is planned to travel from A to B for 7 hours. In fact, its speed is more than planned 10 km. How many hours will it actually arrive?

2. Xiao Qiang went back to school from home. If he walks 50 meters every minute, 12 minutes to go back to school. If he walks 10 meter per minute, he can go back to school a few minutes earlier.

3. The garment factory originally planned to make 120 suits, each with 4.8m cloth. After improving the cutting method. Each set saves 0.3 meters of cloth. How many sets of clothes can be made from the original cloth now?

4. A story book with 576 words per page and 25 pages. The second edition, with smaller words, only needs 18 pages. How many words are arranged on each page now than before?

A bus and a truck leave from A and B at the same time. Buses run 80 kilometers per hour and trucks run 60 kilometers per hour. Five hours later, two cars met. How many kilometers is the railway between A and B?

6. Both Party A and Party B type a 7000-word manuscript at the same time. Party A types 600 words per hour, and Party B types 200 words more than Party A. How many hours can you complete the task?

7. The distance between A and B is 630 kilometers. Two hours after the bus departs from A, the truck departs from B. It is known that the speed of the bus is 65 kilometers per hour and the speed of the truck is 60 kilometers per hour. A few hours after the bus left, the van met it.

8. Wang Fang's deposit is 2.2 times that of Li Li. If Lili keeps 75 yuan in the bank again, their deposits will be equal. How much money did they save?

9. 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?

10. 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)

1 1. Two cars leave from the same place at the same time. After driving for 4.5 hours, car A lags behind car B at 13.5 km. It is known that car A travels 35 kilometers per hour, and how many kilometers does car B travel per hour?

12. Processing a batch of parts, it was originally planned to process 80 pieces a day, just to complete the task. Due to the improvement of production technology, 100 pieces are actually processed every day, which not only completes the processing task four days in advance, but also processes more 100 pieces. How many parts did they actually process?

13. Both parties process a batch of hats, and Party A processes more than Party B every day 10. On the way, B rested for five days. After 20 days, A processed just twice as many hats as B. How many hats did they each process?

1, there are two workshops. If 10 people are transferred from workshop A to workshop B, the number of people in the two workshops is exactly equal. If 20 people are transferred from workshop B to workshop A, the number of people in workshop A is exactly three times that of workshop B. How many people are there in each workshop?

Method 1: Solve by equation method:

If there are x people in workshop B, there are x+20 people in workshop A; From the equation of the problem meaning sequence

(x-20)×3=x+20+20

3x-60=x+40

2x= 100

x=50

A There are 50+20 = 70 people.

Method 2: Use arithmetic:

B (20+20+20× 3) ÷ (3- 1) = 50 (person)

50+20 = 70 (person)

2. Two people, Party A and Party B, process parts. Party A processes 6 parts more than Party B every day, and Party B stops 15 days. After 40 days, the number of parts processed by Party B is exactly half that of Party A. How many parts have A and B processed respectively?

Suppose B processes X A and X+6 every day.

2*X*25=(X+6)40

X=24

B processed 1200 A and 2400 A.

3. The school sent 43.2 cubic meters of fine sand and laid it in the long jump pit with a length of 12 meters and a width of 7.2 meters. How many decimeters can be laid?

43.2 ÷12 ÷ 7.2 = 0.5m =5 decimeters

4. A cuboid pool can store 12.6 tons of water at most. It is known that the pool is 6 meters long and 3 meters wide. How deep is it? (1 m3 water weight 1 ton. Solve by equation)

Let the water depth be x meters.

6×2×X= 12.6× 1

x = 12.6÷ 12 = 1.05m。

5. There is a cuboid oil drum with a side length of 2 decimeters. Pour the oil in it into a 500 ml bottle and fill it with 60 bottles. How deep is the oil in this oil drum?

500ml = 0.5L。

0.5× 60 ÷ 2 2 = 7.5 decimeter

6. A rectangular iron sheet with a length of 50 cm and a width of 45 cm is punched into a box after cutting small squares with a bottom length of 10 cm from four corners. How many cubic centimeters can this box hold?

(50-2×10 )× (45-2×10 )×10 = 7500 cubic centimeters.