1. Application of Olympic Mathematics for Grade Four Pupils
1. Gardeners plant trees along one side of the highway, planting trees every 6 meters, and planting 36 trees in a row. How far is it from the first tree to the last tree? 2. Install street lamps on both sides of the street with a total length of 2 kilometers (both ends should be installed), and install one lamp every 50 meters. A * * *, how many street lamps should be installed? 23, a piece of wood length 10 meters, on average, it is divided into five sections. It takes 8 minutes to saw the next section, and how many minutes does it take to see the next section?
48 students are playing games on the playground. Everyone forms a square with equal people on both sides. There are people at all four vertices. How many students are there on each side?
5. How many pots do you need to put beside the pentagonal pool, so that there are 4 pots of flowers on each side?
6. In order to welcome Children's Day, the school held a group gymnastics performance. The fourth-grade students line up in a square, with 15 people standing on both sides of the outermost layer. How many students are there in the outermost layer? How many people are there in the whole phalanx?
7. The big clock in the square strikes five times at five o'clock and once every eight seconds. 12 knock 12 how long does it take?
The total length of bus lines No.8 and No.5 is 12km, and the distance between two adjacent stops is 1km. How many stations are there?
9. There are 16 high-voltage telephone poles from Wangcun to Licun. The average distance between the poles is 200 meters. How far is it from Wangcun to Licun?
10, and the circumference of the circular skating rink is 150. If a lamp is installed every15m along this circle, how many lamps should be installed in a * * *?
2. Fourth-grade primary school students' Olympic mathematics application problems
Xiaohong, Xiaohua, Xiaoming and Xiao Juan often do good things for the class. In math class, the teacher found that the triangle that dropped the nail yesterday was nailed. Ask four of them after class: Xiaohong said, "I didn't nail it."
Xiaohua said, "It's a little red nail."
Xiao Ming said, "Not me."
Xiao Juan said, "It's Xiaohua."
In order not to let the teacher know, only one of the four of them answered the truth, but the math teacher soon knew who nailed the triangle and praised it. Can you guess who nailed the triangle?
In order not to let the teacher know, only one of the four of them answered the truth, but the math teacher soon knew the person who nailed the triangle and praised him. Can you guess who nailed the triangle?
There are three bags, one containing sugar and the other two containing stones. They read:
Bag A: "This bag contains stones."
Bag B: "This bag is filled with sugar."
Bag C: "The stone is in bag B."
Of the three bags, only one is correct. Which bag has sugar?
3. Four students, A, B, C and D, guess which one of them was rated as the top three. A said, "If I am tried, then B is also tried." B said, "If I am tried, then C is also tried." C said, "If D didn't score, then I didn't score either." In fact, only one person didn't comment, and A, B and C were all right. Q: Who hasn't been rated as a top three student?
3. Fourth-grade primary school students' Olympic mathematics application problems
1. The school is going to distribute exercise books to 15 classes, each class has 144 copies, and 40 copies are reserved for later use. How many exercise books should schools buy? 2. A tree seedling 16 yuan, buy 3 trees and get 1 tree. How much cheaper is it to buy three at a time?
3. Shampoo per bottle 15 yuan. The mall will hold a promotion, and buy 2 bottles for free 1 bottle. Buy two bottles at a time. How much cheaper is each bottle?
4. The school has built a new flower bed with a length of 35 meters and a width of 15 meters. If you can plant 15 Chinese rose flowers per square meter, how many Chinese rose flowers can you plant in this flower bed?
An elephant in the park eats 350 kilograms of food a day, and the breeder has prepared 5 tons of food, which is enough for the elephant to eat for 20 days?
6. Students in a school 1028, sixth-grade graduates 189, and 208 freshmen. How many students are there in the school now?
7. When Xiao Chen calculated the division formula, he took the divisor 30 as 36, and the calculated quotient was 5. What should be the correct result?
8. Plant 75 peach trees around the circular pond and plant 2 pear trees between every two peach trees. How many pear trees can you plant?
9. There are two types of vans, one can take 12 people, and the rent for each van is 120 yuan. Car B 18 people, and the rent per car 160 yuan. There are 58 people in the tour group. What's the cheapest way to rent?
10. In order to celebrate New Year's Day, the pedestrian street is covered with lanterns. From one end of the street to the other, a red lantern is hung every 10 meter (both ends are hung). The pedestrian street is 600 meters long. If red lanterns are hung on both sides of the street, how many red lanterns will a * * hang?
4. Fourth-grade primary school students' Olympic mathematics application problems
1. Two cars, A and B, leave from two places at the same time. Car A travels 60 kilometers per hour and car B travels 55 kilometers per hour. When they met, car A traveled 45 kilometers more than car B. How many kilometers are the two places apart? 2. Both cars of Party A and Party B travel from East Station to West Station at the same time. Car A travels12km more than car B. After driving for 4.5 hours, car A arrives at the West Railway Station and immediately returns along the original road. Meet car b at 3 1.5 km west station. How many kilometers does car A travel per hour?
3. Two cars, Party A and Party B, set off from A and B at the same time, and meet for the first time at a distance of 85km from AT. After meeting, the two cars move on and return immediately after arriving at the station. The second meeting was at a distance of 65 kilometers from B. We calculated the distance between AB and an automobile shop.
A bus and a truck run in opposite directions from the east and the west at the same time. Buses travel 56 kilometers per hour and trucks travel 48 kilometers per hour. The two cars met at a distance of 32 kilometers from the midpoint. What's the distance between east and west?
The distance between a and b is 480 kilometers. Two cars A and B leave from two opposite stations at the same time. Car A travels 35 kilometers per hour and car B travels 45 kilometers per hour. A swallow flies to car B at the same time with car A at a speed of 50 kilometers per hour. When it meets car B, it turns back and flies to car A, when it meets car A, it goes back to car B, and so on. How many kilometers did the swallow fly before two cars met?
5. Fourth-grade primary school students' Olympic mathematics application problems
1. Grandpa Wang's four cows produce 896 kilograms of milk every week. How much milk does an average cow produce every day/kloc-0? 2. Four vehicles delivered 960 bags of cement in three times. How many bags of cement does each car transport at a time?
3.( 1) Every classroom in Shui Bo Primary School has three windows, and each window is equipped with 12 pieces of glass. How many pieces of glass have been installed in 9 classrooms?
(2) Liu Yang Primary School has 12 classrooms, each classroom has 3 windows, and each classroom is equipped with 324 pieces of glass. How many pieces of glass are installed in each window on average?
Xiaohong bought 2 boxes of mung bean cakes, each box is 1 kg. There are 20 pieces in each box. How many grams does each piece weigh on average?
5. A bus starts from Zhang Cun. If you drive at a speed of 60 kilometers per hour, it will take 4 hours to reach Lizhuang. It only took three hours to get there. How many kilometers does this car actually travel per hour on average?
6. Baita Village plans to build a canal. If16m is built every day,18m can be completed. I built 24 meters on the first day. According to the progress of the first day, how many days can it be completed?
7. Hong Guang Hotel bought 100 towels, each 6 yuan. How many towels can I buy if I buy a towel with this money of 8 yuan?
8. A pack of A4 copy paper, 25 sheets a day, will be used up in 20 days. How many days can I use less than five cards a day?
9. A professional beekeeper raised 24 boxes of bees this year. Last year, 5 boxes of bees brewed 375 kilograms of honey. According to last year's honey output, how many Jin of honey can be brewed this year?
10, Dongdongjia raised 135 trees on 15 square meters of land. According to this calculation, how much land is needed to raise 990 trees?