Current location - Training Enrollment Network - Books and materials - Urgent for 20 primary school equation application problems (not obscure)! ! ~~
Urgent for 20 primary school equation application problems (not obscure)! ! ~~
1. The combined age of Party A and Party B is 29 years old. It is known that Party A is three years younger than Party B. How old are Party A and Party B?

2. The circumference of rectangle is 240m, and its length is 0.4 times of 65438+ width. Find the area of a rectangle.

3. Guangshui Cinema has 32 rows of seats, with an average of 38 people in each row; After the expansion, it increased to 40 rows, 584 more people than before. How many people can sit in each row on average after the expansion?

4. There are 84 hectares of grain crops in ji yang Village, which is more than four times of 2 hectares of cash crops. How many hectares of cash crops are there?

Wang Lan has 64 photos, and Jiang Lei gave her 12. At this time, the number of photos of Wang Lan and Jiang Lei is equal. How many original photos of Jiang Lei are there?

6. This grain store delivered 480 packages of rice and flour, and the number of packages of rice was three times that of flour. How many bags of rice and flour?

7. Aunt bought four bars of soap and two towels with 2.8 yuan. It is known that each bar of soap is 0.26 yuan, and how much is each towel?

8. Grandpa is 7 1 year old this year, five years older than Xiaohua. How old is Xiaohua this year?

9. The distance between Station A and bilibili is 255 kilometers. A bus leaves from Station A and a truck leaves from bilibili. They meet 2.5 hours later. The bus speed is 48 kilometers per hour, and the truck speed is how many kilometers per hour?

10. The store sent 500 Jin of fruit, including 8 baskets of apples, and the rest were pears, with 300 Jin of pears. How many kilograms does each basket of apples weigh?

1 1. There are 960 students in Dongjie Primary School, which is 26 times less than before liberation. How many students were there before liberation?

12. A basket of apples weighs 45.5 kilograms. After taking out half of it, it weighs 24.5 kilograms. How much does this basket weigh?

13. Make a rectangle with 120 cm long iron wire. If its length is 38 centimeters, how many centimeters is its width?

14. Wang Ma bought 2 kilograms of apples and paid 5 yuan money. How much is a catty of apples to get back to 0.6 yuan?

15. The store delivered 8 baskets of apples and 10 baskets of pears, each weighing 820kg. Each basket of apples weighs 45 kilograms. How many kilograms does each basket of pears weigh?

16. The school bought back 4 volleyballs and 5 basketballs at a cost of 476 yuan. How much is volleyball for each basketball 56 yuan?

17. The school spends more money on basketball than volleyball, 84 yuan. Buy back five basketballs, each 56 yuan, volleyball and each 49 yuan. How many volleyballs did the school buy back?

18. The school feeding group raised 25 rabbits this year, 8 fewer than last year's three times. How many rabbits were raised last year?

19. It takes 365 days for the earth to go around the sun, which is four times less than that of Mercury 13. How many days does it take for Mercury to go around the sun?

20. The cloth is 36 meters, just cut into 10 adult clothes and 8 children's clothes. People's clothes are 2.4 meters each and children's clothes are 2.4 meters each.

2 1. Li Hui bought a pencil and an exercise book and spent 0.48 yuan. Exercise books cost twice as much as pencils. What is the unit price of pencils and exercise books?

Xiao Qiang's mother is four times older than Xiao Qiang, while Xiao Qiang is 27 years younger than his mother. How old are they?

23. There are two bags of rice. The weight of bag A is three times that of bag B. If you put 5 kilograms of rice in bag B, the two bags of rice are equally heavy. How many kilograms are there in each bag?

24. Dad weighs 66kg, which is 24kg lighter than Xiaojun. How much does Xiaojun weigh?

In 2004, the population of Asia was about 3.9 billion, 400 million more than the total population of Europe. What's the population of Europe?

26. In the 2004 Athens Olympic Games, China won 32 gold medals, three less than the seven in the 1988 Seoul Olympic Games. 1988 how many gold medals did China win?

27. A double-decker bus has 5/kloc-0 passengers, and the number of passengers in the lower deck is twice that in the upper deck. How many passengers are there on the upper floor?

28. In a cage, there are 8 chickens and 8 rabbits. Count their feet. There are 20 chickens. How many chickens and rabbits are there in the cage?

29. Qiang Qiang has 14 toffee, two more than Lili. How many toffee does Lili have?

30. Make a rectangle with a line 72 cm long, so that the length is twice the width. What is the length and width of this rectangle?

3 1. Grandpa's family planted 4 times as many longan trees as litchi trees, 48 more than litchi trees. How many longan trees are there?

32. Two cars started from two stations 345 kilometers apart at the same time and met three hours later. One car travels 55 kilometers per hour, and how many kilometers does the other car travel per hour?

33. A building is 29.2 meters high, and the first floor is ready to open a shop. It is 4 meters high, and the 9 th floor above is a residential building. What is the height of each floor of the house?

34. The length of a rectangular painting is twice the width. Xiaofang uses 1.8m battens as a picture frame. What is the length, width and area of this painting?

35. Build a 360-meter-long road, 80 meters a day. After several days of repair, there are still 40 meters left. How many days have you been repaired?

36. Master and apprentice process a batch of parts at the same time, 450 pieces in 5 hours, 50 pieces per hour for master and how many pieces per hour for apprentice?

37. A rectangle and a square have the same area. The side length of a square is 6 cm, and the length of a rectangle is 10 cm. What is its width?

38. There are 90 more peach trees planted in the orchard than apricot trees, and the number of peach trees is three times that of apricot trees. How many peach and apricot trees are there?

39. The school bought four pairs of badminton rackets and eight pairs of table tennis rackets, and * * * paid 357.6 yuan. Badminton rackets are 25.4 yuan each. How much are table tennis rackets?

40. There are two baskets of apples. The weight of the first basket is 1.8 times that of the first basket. If you take 6 kilograms from the first basket and put it in the second basket, the two baskets are equal in weight. How many kilograms do the first and second baskets of apples weigh?

4 1 .The Forbidden City covers an area of 720,000 square meters, which is less than that of Tiananmen Square 1.6 million square meters. What is the area of Tiananmen Square?

Tongxin County in Ningxia is a "thirsty" area, with an average annual evaporation of 2325mm, which is more than 8 times of the average annual precipitation 109mm. What is the average annual precipitation in Tongxin County?

43. Cheetah is the fastest animal in the world, and its speed can reach 1 10km, which is more than 30km more than that of elephant. How many kilometers per hour can an elephant reach at the earliest?

44. Asia is the largest continent in the world, with an area of 44 million square kilometers, which is 865,438+200,000 square kilometers more than that of Oceania. What is the area of Oceania?

45. The average of three numbers is 13.5, A is four times that of B, and C is 4.5 more than A. What is three?

46. Backstreet Grain Store originally had 986 bales of rice, and 65 bales were delivered. After selling a batch the next day, there were 792 bags left. How many bags were sold the next day?

47. Buy six notebooks from the stationery store tomorrow, pay them to 3 yuan and return to 0.3 yuan. How much is each notebook?

48. The distance between Party A and Party B is 380 kilometers. As mentioned above, the bus and truck set off from two opposite places and met halfway after 4 hours. It is known that the bus speed is 45 kilometers per hour, and how many meters per hour is the truck?

49. There are 240 fruit trees planted in the orchard, of which peach trees are twice as many as pear trees and apricot trees are three times as many as pear trees. How many are there in each of these three trees?

50. The fertilizer plant plans to produce 7,200 tons of fertilizer. It has been produced for four months, with an average of 1.200 tons of fertilizer per month, and the rest is 800 tons per month. How many months will it take to complete the production?

5 1. The construction site needs 106 tons of sand. 1. Automobile transportation 15 times, each time 2.4 tons. The rest are transported by cart, 5 tons each time. How many times will it take to complete?

52. Grade five students planted 40 trees in one class, 32 fewer than in Class Two. How many trees were planted in the second class?

53. A factory has a batch of coal. The original plan was to burn 5 tons a day for 45 days. In fact, it burns 0.5 tons less every day. How many days can this batch of coal burn?

54, a batch of cloth, originally can make 540 sets of clothes, each set of clothes with cloth 1.2 meters, after technical transformation, each set of clothes saves an average of 0.2 meters, how many sets of clothes can be made now?

There are several geese and ducks in the river, among which the number of ducks is four times that of geese. It is also known that there are 27 geese in Abby Mallard. How many are there in each goose and duck?

56. The construction team will build a 4.8-kilometer canal, which is scheduled to be completed in 15 days. In fact, 0.08 km more than originally planned is repaired every day. How many days did it actually take you to finish the task?

57. Xiaogang walks 60 meters from home to school every minute, 10 minutes. If he walks 15 meters per minute, how many minutes will it take to get to school?

The highest bit of 123.58÷0.25 is ().

1 hour 30 minutes = () hours 1.2 hours = () minutes.

The counting unit of 1.23 is () 1.20 accurate to () digits.

The remainder of 7.3÷0. 18=40 is (), and the remainder of 730÷ 18=40 is ().

Four decimal places, rounded to 1.200. The minimum value of this four-digit decimal is (), and the maximum value is ().

After the decimal point is removed, the decimal of a two-digit number is 2.97 larger than the original. This two decimal places is ().

5 kg of milk powder plus 8 kg of water, each kg of milk powder plus () kg of water, each kg of water can soak () kg of milk powder.

A ÷0.25= B ×4 means A ○ B ○ A ○ 1.2 = B × 1.2 means A ○ B.

A ×0.9= B ÷0.9 means A ○ B a ○1.1= b× 0.8 means a b.

On a large piece of paper with a length of 25m and a width of16m, a small square paper with a length of 3m at most can be cut out ().

Firstly, an equation with the total amount as the equivalent relationship is established.

Example: Two trains run in opposite directions from two places 536 kilometers apart at the same time and meet four hours later. The local train is 60 kilometers per hour. How many hours is the express train?

Scheme 1: 4-hour express +4-hour slow train = total distance.

Solution: the speed of the express train is x kilometers per hour.

4X+60×4=536

4X+240=536

4X=296

X=74

Solution 2: (X+60)×4=536

X+60=536÷4

X= 134-60

X=74

A: The express train runs 74 kilometers per hour.

practice

The parachute falls from a height of18000m at a speed of10m per second. At the same time, a hot air balloon rose from the ground. Twenty minutes later, the parachute balls met in the air. How many meters does the hot air balloon rise per second?

Two water inlet pipes, A and B, inject water into a pool that can hold 8 tons of water. A tube injects 400 kilograms of water every minute. How many kilograms per minute can B pipe fill the pool in 8 minutes?

The distance between the two cities is 600 kilometers, and buses and trucks start from both places at the same time. The bus travels 70 kilometers per hour and the truck travels 80 kilometers per hour. How many hours do two cars meet?

The distance between the two places is 249 kilometers, and a train travels from A to B at a speed of 55 per hour. 5 kilometers, how many hours have you walked, and there are still 27 kilometers to B?

Buy 5 notebooks and 3 pencils at a cost of 10.4 yuan. How much is each known pencil in 0.9 yuan per notebook?

The garment factory needs to make 984 sets of clothes, and has already made 120 sets. /kloc-how many sets will be made every day for the rest of 0/2 days?

Nine workers in a production team have to produce 1926 parts, and each person can produce 20 parts per hour. After working for 5.5 hours, the remaining tasks must be completed within 4 hours. How much must everyone produce per hour?

⑧ The motor factory plans to produce 65,438+0,980 motors, and has produced 45 motors every day for four consecutive days. Due to the improvement of technology, the output of 1.5 motors will be increased every day. How many days does it take to actually complete the task?

Second, the equation is established with the total amount as the equivalent relationship.

Example: There are 6,800 bales of grain in two granaries, A and B. A is three times as much as B. How many bales are there in each granary?

Solution: Warehouse B has X bales of grain, so Warehouse A has 3 bales of grain.

Number of packages in granary A+number of packages in granary B = total number of packages in granary B.

X+3X=6800

4X=6800

X= 1700

3X=3× 1700=5 100

Inspection: 1700+5 100=6800 packages (total number of packages in warehouses A and B).

Or 5 100÷ 1700=3 (warehouse a is three times that of warehouse b).

Answer: A raw grain is 5 100, and B raw grain is 0 1700.

practice

The school bought a *** 135 table tennis and basketball. The table tennis I bought is eight times as big as basketball. How many balls are there?

There is an upper and lower bookshelf with 240 books in it. There are twice as many books on the upper shelf as on the lower shelf. How many books are there on each shelf?

The library has purchased 235 books on literature and science, and the number of books on literature and art is twice that of books on science and technology, with 25 books. How many books did you each buy?

Party A, Party B and Party C donated money to the disaster area ***270 yuan. Party A's donation is three times that of Party B and twice that of Party C. How much did they each donate?

⑤ The distance between Wharf A and Wharf B is 379.4 kilometers, and the speed of Ship A is 3.6 kilometers faster than that of Ship B, and the two ships are facing each other at the same time. Three hours after the departure, the distance between the two ships is still 48.2 kilometers. What is the speed of the two ships?

Thirdly, the equation is established by taking the phase difference as the equivalent relationship.

For example, the chemical fertilizer plant used 420 tons of water in March and 380 tons in April, which saved more water than in March. How much is 60 yuan to pay for these two months?

Solution: the water fee per ton is X yuan.

Water fee in March = water fee saved in April.

420X-380X=60

40X=60

X= 1.5

Water fee paid in March 1.5×420=630 (RMB).

The water fee paid in April is 1.5×380=570 (RMB).

Answer: 630 yuan pays the water fee in March and 570 yuan pays the water fee in April.

Exercise:

Xinhua Bookstore sells 90 packages of Class A books and 68 packages of Class B books. I bought 1 100 a book to compare with B fast food. How many books are there in each package?

A basket of apples is 30 kilograms heavier than a basket of pears, and the number of kilograms of apples is 2.5 times that of pears. How many kilograms are apples and pears?

Two square plots, the side length of the first plot is twice as long as that of the second plot, and their perimeters are 56 cm apart. What are the side lengths of these two plots?

Liang Xiao bought 20 pens from 0.5 yuan and 1.2 yuan, and returned 404 yuan to 20 yuan. How many pens did he buy?

The supermarket sent 20 baskets of eggs and 230 Jin of duck eggs. How many kilograms are eggs heavier than duck eggs?

The difference between the number A and the number B is 100, and the number A is four times more than the number B. How to find the number A and the number B?

Two pools * * * store 60 tons of water, and pool A uses 6 tons. After 8 tons of water was injected into Pool B, the water in Pool B was 4 tons less than that in Pool A. How many tons were stored in the two pools?

Master and apprentice are making a batch of parts together. The apprentice made 30 pieces every day, but the master only did it for 6 days because of something, which was 3 days less than the apprentice and 12 more parts than the apprentice. How many pieces does master make every day?

Pet-name ruby Chinese cabbage bought in the canteen is 20 kg less than radish, and radish is 70 kg less than Chinese cabbage. How many Jin did you buy in the Chinese cabbage and radish canteen?

Fourthly, take the equivalence in the problem as the equivalence relation, and establish the equation.

Example: There are two barrels of oil, and the weight of barrel A is twice that of barrel B. Now, 25.8kg is taken out of barrel A, and the remaining two barrels of oil have the same weight. How many kilograms are there in each barrel?

Solution: b barrel oil x kg, a barrel oil 2X kg.

Oil remaining in barrel A = oil remaining in barrel B.

2X-25.8=X-5.2

2X-X=25.8-5.2

X=20.6

2X=20.6×2=4 1.2

Answer: The oil in barrel A weighs 4 102kg, and the oil in barrel B weighs 20.6kg.

Exercise:

A factory has 148 tons of steel, and B factory has 1 12 tons. If a factory uses 18 tons a day and a factory uses 12 tons a day, how many days later will the remaining steel of the two factories be equal?

A two-story bookshelf, there are three times as many books in the upper layer as in the lower layer. If you put 90 books upstairs downstairs, the books on the two floors are equal. How many books are there upstairs and downstairs?

There are 54 people in Workshop A and 48 people in Workshop B. How many people need to be transferred from Workshop A to Workshop B in order to make the two workshops equal?

There are three times as many bags of rice as of flour in the supermarket. After buying 180 bags of rice and 50 bags of flour, the remaining bags of rice and flour are equal. How many bags of rice and flour are there?

A school has people who suffer from living on campus. If there are 6 people living in each dormitory, there will be 34 more people; If there are 7 people living in each dormitory, there will be 4 more dormitories. How many people live on campus? How many dormitories are there?

The flour stored in warehouse A is three times that stored in warehouse B. If 900kg is transported from warehouse A and 80kg is transported from warehouse B, the flour stored in the two warehouses is equal. How much is the raw powder in each warehouse?

There are several boxes of oranges. The weight of box A is 1.8 times that of box B. If box B 1.2 kg is taken out of box A, the two boxes are equal in weight. How many kilograms are there in each box?

Correspondents need to ride bicycles to deliver letters to a certain place within the specified time. He arrived 24 minutes early at 15 km/h and late at 12 km/h 15 minutes. What is the stipulated time? How far is it for him to go to a place?

One train travels from A to B at a speed of 50 kilometers per hour, and another train travels from A to B at a speed of 60 kilometers per hour one hour later. As a result, two trains arrived at B 3 at the same time. How many kilometers is it between A and B?

Attending the first-class sugar per kilogram 16.60 yuan, and the second-class sugar is 8.80 yuan per kilogram. The average price of 80 kg of Grade A sugar mixed with some Grade B sugar is 14.00 yuan per kg. How many kilograms of B sugar do you want?

5. Establish an equation with a larger quantity or multiple as the equivalent relationship.

Example: two baskets of apples, each with the same number. After selling 150 apples in the first basket and 194 apples in the second basket, the remaining apple baskets in the first basket are three times as large as those in the second basket. How many apples are there in each basket?

Solution: At first, there were X in each basket.

The remaining quantity of basket A = 3 times that of basket B..

X- 150=(X- 194)×3

X a 150=3X a 582

2X=432

X=2 16

A: It turns out that the first basket contains apples 2 16.

Exercise:

The plan to build the canal requires 70 people to dig and 50 people to carry soil, but in fact, the number of people digging is three times that of people carrying soil. How many people are transferred from people who carry soil and dig?

The electric power company has 1240 employees, which is six times that of five years ago. There are 40 employees. How many employees were there in the power company five years ago?

There are two piles of coal, a pile of 32 tons and b pile of 57 tons. After that, pile A increased by 4 tons per day, and pile B increased by 9 tons per day. In a few days, there will be twice as much coal in pile B as in pile A.

Two factories, A and B, use the same raw materials to produce the same products. A factory 720 tons, B factory 540 tons. The two factories produce at the same time, using 20 tons a day. How many days later, the remaining raw materials in factory A are twice as much as those in factory B?

There are two engineering teams, a team with 240 people and b team 168 people. Due to work needs, the number of team A is adjusted to twice that of team B. How many employees should team B transfer to team A?

Brothers and sisters have their own money. If my brother gives my sister 20 yuan the same money, if my sister gives my brother 25 yuan, my brother's money is twice as much as my sister's. How much money do brothers and sisters have?

Brother and sister have equal deposits. If the elder brother gives the elder sister 160 yuan, then the elder sister's deposit is three times that of the elder brother. What about the sum of brother and sister's deposits?

Brother is 5 years old, and brother 18 years old. A few years later, my brother was twice as old as my brother.

Father is 45 years old and son 15 years old. A few years ago, the father's age was 1 1 times that of his son.

The original money for attending A is four times that of B. If A gives B 40 yuan, A's money is three times that of B. How much is A and B respectively?

Sixth, choose the solution method according to the conditions in the topic.

There are 300 peach trees, and 30 apricot trees are twice as many as peach trees. How many apricot trees are there?

Two quantities are known.

300×2+30=600+30=630 (tree) A: There are 630 apricot trees.

There are 300 peach trees, which is twice as many as apricot trees. How many apricots are there?

Unknown double quantity

apricot tree

Peach (tree)

Scheme 1: (300-30)÷2=270÷2= 135 (tree)

Solution 2: Suppose there are X apricot trees.

2X+30=300

2X=270

X= 135

Exercise:

It takes 365 days for the earth to go around the sun, which is four times more than that of Mercury. It takes 13 days. How many days does Mercury go around the sun?

A factory plans to produce 480 machines this year, 30 less than twice that of last year. How many machines did it produce last year?

The smallest bird in the world is a hummingbird. A hummingbird weighs 2. 1g, and a sparrow weighs 50 times more than a hummingbird. How many grams does a sparrow have?

The first man-made earth satellite launched by China weighs173kg, which is twice as heavy as the first man-made earth satellite launched by the United States and weighs 0.38kg.. How many kilograms did the first man-made earth satellite launched by the United States weigh?

A factory burned 50 tons of coal this year. Last year, China burned 65,438+00 tons less coal than this year. How many tons were burned last year?

1. The combined age of Party A and Party B is 29 years old. It is known that Party A is three years younger than Party B. How old are Party A and Party B?

2. The circumference of rectangle is 240m, and its length is 0.4 times of 65438+ width. Find the area of a rectangle.

3. Guangshui Cinema has 32 rows of seats, with an average of 38 people in each row; After the expansion, it increased to 40 rows, 584 more people than before. How many people can sit in each row on average after the expansion?

4. There are 84 hectares of grain crops in ji yang Village, which is more than four times of 2 hectares of cash crops. How many hectares of cash crops are there?

Wang Lan has 64 photos, and Jiang Lei gave her 12. At this time, the number of photos of Wang Lan and Jiang Lei is equal. How many original photos of Jiang Lei are there?

6. This grain store delivered 480 packages of rice and flour, and the number of packages of rice was three times that of flour. How many bags of rice and flour?

7. Aunt bought four bars of soap and two towels with 2.8 yuan. It is known that each bar of soap is 0.26 yuan, and how much is each towel?

8. Grandpa is 7 1 year old this year, five years older than Xiaohua. How old is Xiaohua this year?

9. The distance between Station A and bilibili is 255 kilometers. A bus leaves from Station A and a truck leaves from bilibili. They meet 2.5 hours later. The bus speed is 48 kilometers per hour, and the truck speed is how many kilometers per hour?

10. The store sent 500 Jin of fruit, including 8 baskets of apples, and the rest were pears, with 300 Jin of pears. How many kilograms does each basket of apples weigh?

1 1. There are 960 students in Dongjie Primary School, which is 26 times less than before liberation. How many students were there before liberation?

12. A basket of apples weighs 45.5 kilograms. After taking out half of it, it weighs 24.5 kilograms. How much does this basket weigh?

13. Make a rectangle with 120 cm long iron wire. If its length is 38 centimeters, how many centimeters is its width?

14. Wang Ma bought 2 kilograms of apples and paid 5 yuan money. How much is a catty of apples to get back to 0.6 yuan?

15. The store delivered 8 baskets of apples and 10 baskets of pears, each weighing 820kg. Each basket of apples weighs 45 kilograms. How many kilograms does each basket of pears weigh?

16. The school bought back 4 volleyballs and 5 basketballs at a cost of 476 yuan. How much is volleyball for each basketball 56 yuan?

17. The school spends more money on basketball than volleyball, 84 yuan. Buy back five basketballs, each 56 yuan, volleyball and each 49 yuan. How many volleyballs did the school buy back?

18. The school feeding group raised 25 rabbits this year, 8 fewer than last year's three times. How many rabbits were raised last year?

19. It takes 365 days for the earth to go around the sun, which is four times less than that of Mercury 13. How many days does it take for Mercury to go around the sun?

20. The cloth is 36 meters, just cut into 10 adult clothes and 8 children's clothes. People's clothes are 2.4 meters each and children's clothes are 2.4 meters each.

2 1. Li Hui bought a pencil and an exercise book and spent 0.48 yuan. Exercise books cost twice as much as pencils. What is the unit price of pencils and exercise books?

Xiao Qiang's mother is four times older than Xiao Qiang, while Xiao Qiang is 27 years younger than his mother. How old are they?

23. There are two bags of rice. The weight of bag A is three times that of bag B. If you put 5 kilograms of rice in bag B, the two bags of rice are equally heavy. How many kilograms are there in each bag?

24. Dad weighs 66kg, which is 24kg lighter than Xiaojun. How much does Xiaojun weigh?

In 2004, the population of Asia was about 3.9 billion, 400 million more than the total population of Europe. What's the population of Europe?

26. In the 2004 Athens Olympic Games, China won 32 gold medals, three less than the seven in the 1988 Seoul Olympic Games. 1988 how many gold medals did China win?

27. A double-decker bus has 5/kloc-0 passengers, and the number of passengers in the lower deck is twice that in the upper deck. How many passengers are there on the upper floor?

28. In a cage, there are 8 chickens and 8 rabbits. Count their feet. There are 20 chickens. How many chickens and rabbits are there in the cage?

29. Qiang Qiang has 14 toffee, two more than Lili. How many toffee does Lili have?

30. Make a rectangle with a line 72 cm long, so that the length is twice the width. What is the length and width of this rectangle?

3 1. Grandpa's family planted 4 times as many longan trees as litchi trees, 48 more than litchi trees. How many longan trees are there?

32. Two cars started from two stations 345 kilometers apart at the same time and met three hours later. One car travels 55 kilometers per hour, and how many kilometers does the other car travel per hour?

33. A building is 29.2 meters high, and the first floor is ready to open a shop. It is 4 meters high, and the 9 th floor above is a residential building. What is the height of each floor of the house?

34. The length of a rectangular painting is twice the width. Xiaofang uses 1.8m battens as a picture frame. What is the length, width and area of this painting?

35. Build a 360-meter-long road, 80 meters a day. After several days of repair, there are still 40 meters left. How many days have you been repaired?

36. Master and apprentice process a batch of parts at the same time, 450 pieces in 5 hours, 50 pieces per hour for master and how many pieces per hour for apprentice?

37. A rectangle and a square have the same area. The side length of a square is 6 cm, and the length of a rectangle is 10 cm. What is its width?

38. There are 90 more peach trees planted in the orchard than apricot trees, and the number of peach trees is three times that of apricot trees. How many peach and apricot trees are there?

39. The school bought four pairs of badminton rackets and eight pairs of table tennis rackets, and * * * paid 357.6 yuan. Badminton rackets are 25.4 yuan each. How much are table tennis rackets?

40. There are two baskets of apples. The weight of the first basket is 1.8 times that of the first basket. If you take 6 kilograms from the first basket and put it in the second basket, the two baskets are equal in weight. How many kilograms do the first and second baskets of apples weigh?

4 1 .The Forbidden City covers an area of 720,000 square meters, which is less than that of Tiananmen Square 1.6 million square meters. What is the area of Tiananmen Square?

Tongxin County in Ningxia is a "thirsty" area, with an average annual evaporation of 2325mm, which is more than 8 times of the average annual precipitation 109mm. What is the average annual precipitation in Tongxin County?

43. Cheetah is the fastest animal in the world, and its speed can reach 1 10km, which is more than 30km more than that of elephant. How many kilometers per hour can an elephant reach at the earliest?

44. Asia is the largest continent in the world, with an area of 44 million square kilometers, which is 865,438+200,000 square kilometers more than that of Oceania. What is the area of Oceania?

45. The average of three numbers is 13.5, A is four times that of B, and C is 4.5 more than A. What is three?

46. Backstreet Grain Store originally had 986 bales of rice, and 65 bales were delivered. After selling a batch the next day, there were 792 bags left. How many bags were sold the next day?

47. Buy six notebooks from the stationery store tomorrow, pay them to 3 yuan and return to 0.3 yuan. How much is each notebook?

48. The distance between Party A and Party B is 380 kilometers. As mentioned above, the bus and truck set off from two opposite places and met halfway after 4 hours. It is known that the bus speed is 45 kilometers per hour, and how many meters per hour is the truck?

49. There are 240 fruit trees planted in the orchard, of which peach trees are twice as many as pear trees and apricot trees are three times as many as pear trees. How many are there in each of these three trees?

50. The fertilizer plant plans to produce 7,200 tons of fertilizer. It has been produced for four months, with an average of 1.200 tons of fertilizer per month, and the rest is 800 tons per month. How many months will it take to complete the production?

5 1. The construction site needs 106 tons of sand. 1. Automobile transportation 15 times, each time 2.4 tons. The rest are transported by cart, 5 tons each time. How many times will it take to complete?

52. Grade five students planted 40 trees in one class, 32 fewer than in Class Two. How many trees were planted in the second class?

53. A factory has a batch of coal. The original plan was to burn 5 tons a day for 45 days. In fact, it burns 0.5 tons less every day. How many days can this batch of coal burn?

54, a batch of cloth, originally can make 540 sets of clothes, each set of clothes with cloth 1.2 meters, after technical transformation, each set of clothes saves an average of 0.2 meters, how many sets of clothes can be made now?

There are several geese and ducks in the river, among which the number of ducks is four times that of geese. It is also known that there are 27 geese in Abby Mallard. How many are there in each goose and duck?

56. The construction team will build a 4.8-kilometer canal, which is scheduled to be completed in 15 days. In fact, 0.08 km more than originally planned is repaired every day. How many days did it actually take you to finish the task?

57. Xiaogang walks 60 meters from home to school every minute, 10 minutes. If he walks 15 meters per minute, how many minutes will it take to get to school?