2. Yuhong Primary School originally planned to plant apricot, peach and pear trees *** 1500. After planting trees, when 3/5 of the total apricot trees and 30 peach trees are planted, 15 pear trees will be temporarily transported. At this time, the number of the remaining three trees is just equal. How many trees were originally planned to be planted?
1.a = 8.8+8.98+8.998+8.9998+8.99998, and the integer part of a is _ _ _ _.
2. The divisor of1995 * * is _ _ _.
3. The equation "Melissa Zhou× Hao Hao+Math = 1994" means the product of two numbers. When one number is added, the total is 1994. In the formula, the three Chinese characters "Xue, Hao and Shu" each represent three different numbers, among which "Shu" stands for _ _ _ _.
4. As shown in figure 1, the seven Chinese characters "Hao, Gang, Companion, Help, Hand, Reference and Seeking" represent the seven numbers 1 ~ 7. It is known that the five sums obtained by adding three numbers on three straight lines and three numbers on two circles are all equal. The "good" in the middle of the picture stands for _ _ _.
5. Uncle Agan, a farmer, wants to build a rectangular chicken nest with 20 pieces of metal nets with a length of 2m and a width of 1.2m against the wall (as shown in Figure 2). In order to prevent chickens from flying out, the height of the henhouse should not be less than 2 meters. In order to maximize the area of henhouse, the length of BC should be 100 meter.
7. Xiao Hu and Xiao Tu calculate the product of two digits of A and B. Xiao Hu misread the single digit of A, and the calculation result is1274; Xiao Tu misread the ten digits of a number, and the calculation result was 8 19. One number is _ _ _ _.
In 8. 1994 "World Cup" football match, teams A, B, C and D were divided into the same group. In the group stage, each of the four teams will play a game with the other three teams. According to the regulations: the winning team in each game can get 3 points; The losing team gets 0 points; If the two sides draw, each team will get 1 point. Known:
(1) The total scores of the four teams in three games are divided into four consecutive odd numbers;
(2) Team B ranked first in total score;
(3) Team D only tied with the other team twice, one of which was tied with Team C. ..
According to the above conditions, it can be inferred that the total score of team _ _ _ ranks fourth.
9. There are 2 16 bricks piled on an open space (as shown in Figure 3), and this brick pile has two sides against the wall. Now cover the surface of this brick pile with lime, and there are _ _ _ _ _ blocks of lime-coated bricks.
10. 90% employees of an enterprise in a southern city are shareholders, 80% employees are "ten thousand households" and 60% employees are wage earners. Then, at least _ _% of the "ten thousand households" in this enterprise are shareholders; At least _ _ _ _ _ _ (fill in a score) of the wage earners are "ten thousand households".
1 1. There is a bug on the square paper (Figure 4). It starts from a point O on the straight line AB and crawls along the horizontal or vertical line on the square paper. The length of each paragraph on a square paper is 1 cm. After climbing a few short sections, the bug is still on the straight line AB, but it does not necessarily return to the O point. If a bug crawls more than 2 cm, there are _ _ _ kinds of crawling routes; If the bug crawls more than 3 cm, the crawling route of the bug is _ _ _ _.
12. Natural numbers are arranged as follows according to certain rules:
According to the arrangement law, 99 ranks in the _ _ _ row and the _ _ _ column.
Third, the application question (1 question 5 points, the second to sixth questions 7 points each. ***40 points. )
1. As shown in Figure 5, AF=2FB, FD=2EF, and the area of right triangle ABC is 36 square centimeters. Find the area of parallelogram EBCD.
2. Limin Store buys a batch of mosquito-repellent incense from a grocery company, and then sells it at a price increase of 40% per bag according to the net profit it hopes to obtain. However, when 90% of the mosquito-repellent incense was sold at this price, the summer passed quickly. In order to speed up the capital turnover, the store sold all the remaining mosquito-repellent incense at a preferential price of 30% off the price. So the actual net profit is less than the expected net profit 15%. According to the regulations, no matter what the price, after selling this batch of mosquito-repellent incense, business tax 300 yuan should be paid (taxes and money used to buy mosquito-repellent incense as the cost). How much did it cost to buy this batch of mosquito-repellent incense at Limin Store?
3. After Miss Li transferred 1 girls from the math interest group to the English interest group, the remaining students
4. The gardener should plant trees at the edge of a circular flower bed with a circumference of 300 meters. They first dug a hole every 3 meters along the edge of the flower bed. When they finished digging 30 holes, they were suddenly told that they would plant a tree every 5 meters instead. In this way, how many holes will they have to dig to complete the task?
A college student who learns from Lei Feng's group works in a restaurant for half an hour every day, and each student can earn 3 yuan money. By165438+1October 1 1, they had earned 1764 yuan. The team plans to earn 3000 yuan before February 9, 2008 and donate it to Project Hope. So the team must add one person in a few days. Q: This extra person has to work in the restaurant every day from the date of 165438+ 10, so that he can earn exactly 3000 yuan before the date of 65438+February 9?
6. There is a male athlete and a female athlete practicing long-distance running on the circular track, and the running speed is constant. Male athletes run a little faster than female athletes. If they start from the same starting point and run in the opposite direction at the same time, they will meet every 25 seconds. Now, they start from the same starting point and run in the same direction at the same time. 13 minutes later, the male athlete caught up with the female athlete. How many laps did the female athlete run when she caught up? (The number of laps is rounded off)
Four, short answer questions (***5 points)
Is the sum of all the numbers in the multiple of 1.555555 odd? (3 points)
2. If yes, please give examples; If not, please explain why. (2 points)
Five, drawing questions (***9 points)
1. The picture on the right is a right trapezoid. Please draw a line segment and divide it into two quadrangles with the same shape and equal area. (Please indicate the data and symbols indicating the position of the line segment or write a diagram). (4 points)
2. The following five figures have two characteristics: (1) consists of four connected squares with the same size; (2) Every small square has at least one common edge with another small square. We call the graph with the above two characteristics "Tetris".
If a Tetris rotates on a plane, which is the same as another Tetris (such as B and E in the above picture), then these two Tetris are only one kind.
In addition to the above four kinds, there are several Tetris. Please draw them all.