2. Use a wire with the length of 12.4 decimeter to form an isosceles trapezoid. It is known that the two waists of this trapezoid are 6.4 decimeters long and the area is 9 square decimeters. What is the height of this trapezoid? (Equation solving)
There are several geese and ducks in the river, among which the number of ducks is four times that of geese. I also know that there are 27 geese in Abby Mallard. How many geese and ducks are there?
4. A forest farm should plant 2000 trees, with an average of 350 trees per day in the first three days. The rest are required to be planted in two days. How many trees should be planted on average every day?
The distance between a and b is 480 kilometers. A car travels from A to B at a speed of 60km/h and returns at a speed of 40km/h.. What is the average speed of this car back and forth?
6. The road team built a section of road. In the first 8 days, the average daily150m, and the remaining 3000m will be repaired in 4 days. How many meters does this road repair team repair on average every day?
7. A train traveled 272 kilometers in 4 hours. According to this calculation, ①. How many hours does it take to drive 23 12 km? ② How many kilometers did this train travel in 15 hours? (Answer in two ways)
8. This clothing factory used to make a 2.5-meter cloth. After adopting the new cutting method, each suit saves 0.5 meters. How many sets of cloth can you make now from the original 60 sets of clothes?
9. The engineering team built a 54-kilometer-long highway, and 6.3 kilometers were built in the first seven days. At this rate, how many days will it take to finish the rest?
10, A and B are 480 kilometers apart. Two cars, A and B, start from A and B at the same time and drive in opposite directions. After six hours of meeting, car A travels 45 kilometers per hour, and car B travels how many kilometers per hour?
13 engineering team is going to build a 4.8km long canal, which is scheduled to be completed in 15. Actually, it is 0.08 kilometers more than originally planned every day. How many days did it actually finish?
14, Grade 6 students collect tree species. 1 class of 45 people, each collecting 0. 13 kg, 2 classes of * * 36 people collecting 6. 15 kg. How many kilograms of tree species did Class Two collect?
15, four giant pandas ate 169. 12 Jin of bamboo leaves in two weeks. How many kilograms of bamboo leaves does each giant panda eat every day?
16, clothing factory makes school uniforms. Now every 2 meters of cloth is used, which is 0.2 meters less than the original. How many sets of cloth can 880 sets of school uniforms make?
17, a barrel with a weight of 9.2 kg. Half poured, and the barrel weighs 5.6 kilograms. How much does this bucket weigh?
18, Xiaoming's new room is going to be paved with square bricks. If you use a square brick with an area of 0.09 square meters, you need 160. If you use a square brick with a side length of 0.4 decimeter, how many pieces do you need?
19. A steel mill planned to produce 54,000 tons of steel throughout the year, and the task was completed two months ahead of schedule. How many tons is the actual monthly output more than planned?
20. The school bought 4 desks and 9 chairs for 89 1 yuan. It is known that the desk of 1 costs the same as six chairs. How much is each chair and table?
23. A canal was originally planned to be built 0.45 km per day and completed in 30 days. The actual daily work efficiency is 1.2 times of the original plan. How many days does it actually take to complete this task?
24. A farm tool factory produces 2,500 small farm tools. In the first five days, it produces 180 pieces every day, and the rest should be completed in eight days. How many farm tools should be produced every day?
25. The school canteen returned 26 bags of flour, 20kg each. The returned rice weighs 80 kilograms, less than twice the weight of flour. How many kilograms of rice were returned?
26. A construction site needs 47 tons of sand, which was transported six times by a 4.5-ton truck, and the rest was transported by a 2.5-ton truck. How many times will it be transported?
27. Trapezoidal orchard has a bottom of 240m, an upper bottom 180m and a height of 60m. If each fruit tree covers an area of 9m2, how many fruit trees are there in this orchard?
28. A passenger train and a freight train set off from two cities, A and B, and met for four hours. It is known that the speed of passenger trains is 90 kilometers per hour, which is 1.5 times that of freight trains. What's the distance between the cities of A and B?
30. A workshop of the fitness factory binds a batch of exercise books. If you bind 600 books per hour, you can finish the task in 8 hours. If you bind 800 books per hour, how many hours can you finish the task ahead of schedule?
3 1. Jingjing read a story book on page 129. She has been reading it for 7 days, reading 12 pages every day, and the rest read 15 pages every day. How many days can she finish it?
32. For two barrels of oil, the weight of barrel A is 1.8 times that of barrel B. If you take out 1.2 kg from barrel A, the weight of two barrels of oil will be equal. How many kilograms are there in each barrel?
33. A billboard is triangular, with a base length of12.5m and a height of 6.4m.. If you want to paint a billboard with 0.4 kg of paint per square meter (only one side), how many kg does it take to paint this billboard?
36. Both parties process the same machine parts. Party A processed 280 parts, 40 less than the number of parts processed by Party B in five days. How many parts does Party B process on average every day?
37. The sports group bought 4 soccer balls and 20 skipping ropes, which cost 238.4 yuan. It is known that every skipping rope 2.8 yuan. How much is each football?
39. The experimental primary school has 108 students, among whom the number of boys is 1.4 times that of girls. How many boys and girls are there in the science and technology group?
40. There are three times as many people skipping rope as kicking shuttlecock in sports competitions. It is known that kicking shuttlecock is 20 times less than skipping rope. How many people jump rope and kick shuttlecock respectively?
4 1. Adail bakery makes a birthday cake, and each cake needs 0.32kg of flour. Master Wang collected 5 Jin of flour to make cakes. How many birthday cakes can he make at most?
42. The fruit shop sent 495 kilograms of apples, which were packed in cartons. How many cartons do you need if each carton contains 25 kilograms?
43. There are 39 three-wheeled motorcycles and two-wheeled motorcycles in the motorcycle field. These two kinds of motorcycles have 96 wheels. How many kinds of motorcycles are there?
How many basketballs and volleyballs did the school buy *** 19, each basketball 35 yuan and each volleyball 20 yuan, * * * was handed over to 440 yuan, and how many basketballs and volleyballs did the school buy?
The floor of Xiaoxiao bedroom is 4.5 meters long and 3.2 meters wide. Decoration to buy two kinds of floor tiles, one is a square brick with a side length of 0.3 meters per 3 yuan dollar, and the other is a square brick with a side length of 0.4 meters per 4 yuan dollar.
If the whole room is paved with square tiles with a side length of 0.3 meters, how many tiles do you need at least?
(2) If the whole room is paved with square tiles with a side length of 0.4m, how many tiles do you need at least?
Which kind of ceramic tile is cheaper to choose?
The bedroom of the wise old man is 4.2 meters long and 3.5 meters wide. He plans to cover the room with a square brick with a side length of 70 cm. If the price of each square brick is 8.5 yuan, how much will it cost?
There is a piece of land where 100 chrysanthemums are planted, and each chrysanthemum occupies a square with a side length of 40 cm. If the Chinese rose is replanted, each Chinese rose occupies a square with a side length of 20 cm. How many Chinese roses can be planted in this land?
The age of the father and the age of the son add up to 60. As we all know, a father is three times as old as a son. How old is my son in five years? (Equation solving)
There are 25 boys and 0/5 girls in Class One, Grade Five. Under the democratic selection of the whole class, * * * produced 10 class cadres. What percentage of class cadres are there?
In the activity of "making badges", Mr. Wang bought two pieces of cardboard, each 4 cm long and 3 cm wide. If each badge is 8 cm long and 6 cm wide, will these two pieces of cardboard be enough for the whole class?
There are two restaurants in the commercial street, Star and Moon. The picture below shows the operation of Children's Day at 8 pm. Can you calculate from the chart that the restaurant is crowded?
6 m 4 m
In order to encourage residents to save water, a water supply company in a city stipulates that each household needs less water15t (including15t) and charges per ton 1.2 yuan; If it exceeds 15 ton, 5 yuan will be charged for each ton. The naughty family paid the water fee in 28 yuan last month. Do you know how many tons of water naughty bag used last month?
Xiao Ming has read 500 pages of books and has already read 150 pages. How many pages did he read? How many pages are left to read?
At the same time, two cars, A and B, set off from two places 420 kilometers apart. Car A travels 36 kilometers per hour and car B travels 34 kilometers per hour. When will the two cars meet? How many kilometers did car A travel when they met?
The road repair team has built a road, which has been built for kilometers, that is, more than kilometers. What is the total length of this road?
A triangular wheat field with a bottom of 90 meters and a bottom height of 1.5 times. The average yield of wheat per square meter is 0.45 kg. How many kilograms of wheat are harvested in this land?
Seven classes in Grade Three and Grade Four * * * collected tree species 155 kg, with an average of 20 kg in Grade Three and 25 kg in Grade Four. How many classes are there in grade three?
Xiaoqing walks 29 kilometers at 6 o'clock, and Liang Xiao walks 4.4 kilometers per hour. Which of them is faster?
Xiaoya's height 1 .53m, Xiaohong's height 1 m and Xiaoding's height1m 56cm. Who is the tallest among them? Who is the shortest?
A batch of fruits is sold on the first day and the next day. How much fruit is left in this batch?
There are tons of apples in the fruit shop, less than tons of pears. How many tons are there in two kinds of fruits?
There are tons of apples and pears in the fruit shop. How many tons of two kinds of fruits?
Pave a long road. It has been paved for several kilometers. How many kilometers are the rest less than those already paved?
Chickens and rabbits live in the same cage. 100 heads, 360 feet. How many chickens and rabbits are there respectively?
A stamp collector bought 34 stamps from 2 yuan and 5 yuan, just using 98 yuan. How many stamps did he buy each?
A quiz has ***20 questions. Get 5 points for answering a question correctly and 3 points for answering a question incorrectly. Xiaoming scored 60 points, so what did he do wrong?
52 students went boating, 1 a * * * took 1 1 a boat, including 6 people in a big boat and 4 people in a small boat. How many big boats and small boats are there?
A transportation team transports 1 0,800 glass bottles, and the freight for each piece is 0.9 yuan according to the contract. If a glass bottle is damaged, it will not only be free of freight, but also compensate 8 yuan. As a result, the transportation team got the freight 1, 593.3 yuan. How many glass bottles were damaged during transportation?
Two engineering teams, Party A and Party B, built a highway with a length of 1 0,400 meters. They started construction at both ends at the same time. Team A repairs 80 meters every day, and each team B.
Repair 60 meters a day, how many days can it be completed?
There is a document of 5700 words. As time is tight, two typists A and B are arranged to start typing at the same time. A points 100 words, b points 90 words. How long will it take to complete the recording of this document?
The railway line from Beijing to Hohhot is 660 kilometers long. A train leaves Hohhot at a speed of 48 kilometers per hour. Another train departs from Beijing with a speed of 72 kilometers per hour. The two trains left face to face at the same time. When did they meet?
Naughty walks 70 meters per minute, smiling walks 50 meters per minute, and the distance from naughty home to smiling home is 840 meters. They both started from home at the same time. How far did Xiaoxiao go when they met?
Great Wall Travel Agency has two preferential schemes A and B: A: One-day tour for adults 160 yuan and children 160 yuan; B: group ticket for more than 5 people (including 5 people) 100 yuan.
1. In the background of "Great Wall Travel Agency launches two preferential schemes, A and B", answer the following questions:
(1)3 adults and 2 children, which scheme saves money by buying tickets?
(2) One adult and seven children, which scheme saves money?
(3) What about seven adults and three children?
Jinghua Travel Agency has launched two preferential schemes, A and B, with 10 parents bringing five children. Which scheme saves money? A, group of 5 people (including 5 people), each 300 yuan. B, every adult 400 yuan, every adult 200 yuan.
I hope 54 people from Class 5 (2) in primary school will go to play. Please complete the table below and tell us how to rent a boat to save money. The maximum number of passengers per ship is 10, and the maximum number of passengers per boat is 18 yuan. The maximum number of passengers per boat is 4, and each boat is in 8 yuan.
A primary school actively carries out activities to protect the mother river. The school organized 130 teachers, parents and students to plant trees outside Canada by bus. The bus is limited to 42 people, and each car rents 200 yuan every day. Passenger cars are limited to 24 people, and the daily rent for each car is 150 yuan. Complete the table below and explain how to rent a car to save money.
The expenditures of Xiaoming's family in August accounted for about 10% of the total expenditures, and the expenditures on catering and fruits accounted for about 10% of the total expenditures. What percentage do these two expenditures account for?