1. 15.48×35- 154.8× 1.9+ 15.48×84=

2. Solve the equation.

5×(2x+7)-30=3×(2x+7) x=

The number at 106 to the right of the circular decimal point of 3.0.37 205 is.

4. A row of telephone poles, the distance between two telephone poles used to be 35 meters, but now it is 45 meters. If one position of the starting point does not move, at least one pole does not need to move.

The speed of a ship in still water is18km, and it takes 4 hours to travel 80km along the river. The current velocity of this river is.

6. Students go for a spring outing, 78 people bring kettles, 77 people bring fruits, and 48 people bring both kettles and fruits. Some students took part in the spring outing.

7. As shown in the figure, E, F and G are parallelograms respectively.

In ABCD, the midpoints of AD, BC and DC are parallel.

The area of the quadrangle is twice that of the shaded part.

8. The smallest four digits that can be divisible by 3, 4 and 5 at the same time is.

9. In a game, the perfect score is 100, and everyone can do it four times, so that Xiao Wang's average score is 85, so his score in any game can't be lower than 0.

10. In the fifth-grade math contest, the product of Xiaoming's ranking times his age and contest results is 2 134, and Xiaoming's ranking name and score are points.

1 1. There is a six-digit □2002□ divisible by 88. This six-digit number is.

12. Make a formula with four numbers: 5, 5, 5, 1, and the result is 24. The formula is.

13. There are six classes in Grade Five, and the number of students in each class is equal. Choose 16 students from each class to participate in the Young Pioneers activities, and the rest are equivalent to the original four classes.

14. The sum of five consecutive odd numbers is 95, of which the largest is and the smallest is.

The sum of 15. 1+2+3+4+5 ... +2007+2008 is. (odd or even)

16. Seven of the eight rooms have lights on. If you toggle the switches in four rooms at the same time, you can (or can't) turn off the lights in all rooms, and toggle the switches in five rooms at a time, you can (or can't) turn off the lights in all rooms.

17. On New Year's Eve, lanterns are hung brightly. You can count them all on the count of three. On the count of five and five, there is one left, on the count of seven and seven, there are three missing on the count of eight and eight. Please guess for yourself that there is at least one lantern.

18. Four students, A, B, C and D, made different fouls in the basketball match. Four referees, A, B, C and D, talked: A said, "A fouled four times, and B fouled three times." B said, "C fouled four times and B fouled twice." C said, "D fouled twice, C"

19. Party A, Party B and Party C work in Nanjing, Suzhou and Xi 'an respectively. Their occupations are workers, farmers and teachers. It is known that Party A does not work in Nanjing, Party B does not work in Suzhou, Party C works as a worker in Suzhou, Party C works as a teacher in Nanjing, and Party B is not a farmer. So, Party A is working.

20. As shown in the figure, in trapezoidal ABCD, DE=3EC.

BC=3FC, and the area of quadrilateral AECF is14m2.

Find the area of trapezoidal ABCD is square meters.

I can't get the image. There are two figures.

Olympic Mathematics Examination Paper for Grade Five (2)

1. Simplified calculation: 20 points.

1746+ 1747+ 1748 7.8 1×48+78. 1×4. 1+0.78×90

38×29+84×7 1+46×29 34÷ 17+29÷ 17+27÷ 17+46÷ 17

Second, interesting figures: (10)

Yi Liu

Qingliuyi

+Celebrate June 1 day.

1 9 9 4

Fourth, solve the problem. (65 points)

1. If the number A subtracts three times the number B, the difference is 5 1. The sum of the number A plus twice the number B is 1 1 1, so the number A= () and the number B= ().

2. A math contest has 65,438+00 questions. Answer one question correctly, 10; Do a wrong question, deduct 2 points; If he made a mistake, Xiao Ming got 76 points, and Xiao Ming did the problem correctly ().

3. There are 222 cars in Station A, 78 cars in bilibili, 22 cars from Station A to bilibili and 26 cars from bilibili to Station A every day. After () days, the number of cars in Station A is five times that of bilibili.

4. A row of telephone poles. The distance between the two poles used to be 35 meters, but now it is 45 meters. If one position of the starting point does not move, at least one pole does not need to move.

5. It takes 42 seconds for a train to cross a bridge with a length of 22 1 m and 36 seconds for a tunnel with a length of 172 m at the same speed. The conductor is () meters long and the speed of the train is () meters.

6. The sum of four numbers A, B, C and D is 175, A plus 4, B minus 4, C times 4, and D is divided by 4, so four numbers are equal, then A = (), B = (), C = () and D = ().

7. Party A bought 4 kilograms of apples and 3 kilograms of pears, Party B bought 3 kilograms of apples and 2 kilograms of pears, and Party C bought 3 kilograms of apples and 4 kilograms of pears. Party A spent 3.45 yuan more than Party B, and Party B spent less 2.9 yuan than Party C, so Party A spent () yuan and Party B spent () yuan.

8. A natural number divided by 3 is 1, divided by 5 is 2, and divided by 7 is 3. The smallest natural number is ().

1, in 1, 2,3 ... 499,500, the number 2 appears () times in a * * *.

2. The canteen has ***35 1 bags of rice and flour. If we add 20 bags of rice and reduce 50 bags of flour, the number of bags of rice is more than that of flour 1. There used to be () bags of rice and () bags of flour.

3,279 is the sum of four numbers A, B, C and D. If A subtracts 2, B adds 2, C divides 2 and D multiplies 2, then these four numbers are all equal, so A is (), B is (), C is () and D is ().

Comparing the ages of the two brothers, the elder brother said, "When I was your age this year, you were only 5 years old." The younger brother said, "When I reach your age this year, you will be 17 years old." My brother is () years old and my brother is () years old.

Party A said to Party B, "My age is three times that of you." Party B said to Party A, "My age in five years is the same as that you were 1 1 years ago." Party A is () years old and Party B is () years old.

6. The distance between A and B is 265,438+0 km. At 9 o'clock in the morning, A and B set off from A and B respectively and walked in opposite directions. A returns immediately after arriving at B, B returns immediately after arriving at A, and they meet for the second time at noon 12. At this time, A walked 9 kilometers more than B, and A walked () kilometers more every hour.

7. A ship is sailing between two docks. It takes 4 hours to sail downstream and 5 hours to sail upstream. The speed of water is 5 kilometers per hour. The ship is sailing at a speed of 100 km per hour in calm water.

8. The total length of railway bridge is1200m. It takes 75s for the train to cross the bridge and 15s for the train to cross the roadside pole, so the total length of the train is () meters.

9. Snails climb from a dry well net, climbing 1 10 cm during the day and dropping 40 cm at night. If they want to climb to the wellhead during the day of the fifth day, the well must be at least () cm deep.

10, Teacher Zhou gave the students exercise books, and each student gave seven more. If each student has two more and one student can't get one, then there are () students and () exercise books.

1 1, Wang Fei traveled 240 kilometers at a speed of 40 kilometers per hour, and traveled at a speed of 60 kilometers per hour when returning from the original road. The average speed of going back and forth in Wang Fei is () kilometers per hour.

12, "IMO" is the abbreviation of International Mathematical Olympiad. Write these three letters in three different colors. There are five different colors. According to the above requirements, you can write "IMO" in different colors in ().