Taiyuan city in 2006-2007 school year eighth grade fourth evaluation mathematics examination paper answer.

Fill in the blanks. (**20 points, 2 points for each small question)

1. The dividend is 3320, the quotient is 150, the remainder is 20 and the divisor is ().

2.3998 is the sum of four consecutive natural numbers, of which the smallest number is ().

There is a two-digit number. Add a decimal point before one of its digits and then add it to the two-digit number to get 20.9. This two-digit number is ()

4. Fill in the smallest natural number, so that the last four digits of the product of 225×525× are all 0.

5. Fill in the brackets in the following formula to make the equation hold.

5×8+ 16÷4-2=20

6. From the nine numbers of 1, 2, 3, 4, 5, 6, 7, 8 and 9, three numbers are randomly selected to form a group, so that the average value is 5, and there are () methods.

7. The postal code of a place can be expressed by ABCCDD. It is known that the sum of these six numbers is 8, the sum of A and B is equal to 2 D, and A is the smallest natural number. This postal code is ().

8. The sum of two numbers is 444, and the large number is divided by the fractional quotient 1 1, and there is no remainder. The big number is ().

9. Fill in the following brackets with the numbers 5, 1 1, 14,15,2122, so that the equation can be established.

( )×( )×( )=( )×( )×( )

10. The cube has six faces, and each face is written with 1 number, namely 1, 2, 3, 4, 5, 6, and the sum of the two numbers directly opposite each face is 7( 1 and 6, 2 and 5, 3 and 4). The figure below is an expanded view of six faces of a cube. Please fill in the numbers in the blanks.

Second, judge. (Tick "√" in brackets means right, tick "×" means wrong, *** 10, 2 points for each small question)

1 1. Decimals greater than 0.9997 and less than 0.9999 are only 0.9998. ( )

12. A rectangular colored paper with a length of 2 1 cm and a width of15cm. Cut out the largest square first, and then cut out the largest square from the rest of the paper. At this point, the length of the paper is 6 cm. ( )

13. There are several hats in a box, except two, which are all red, blue and yellow. There are three hats in the box. ( )

14. The square nursery covers an area of 1 hectare, the length of each side is increased by 100 m, and the nursery area is increased by 3 hectares. ( )

15. Pencils 180, divided into several equal parts, each with no less than 7 pencils and no more than 25 pencils. * * * There are seven differences.

Third, choose. (Fill in the serial number of the correct answer in brackets, *** 10, 2 points for each small question)

Business cycle decimal 16.5 ÷ 7 means that the 200th place after the decimal point of this decimal point is ().

a、7 B、 1 C、2 D、5

17. Two ropes with the same length, the first one is cut in half, the second one is cut by 0.5m, and the remaining two ropes ().

A, the first length b, the second length

C, the same length d, not necessarily which one is longer.

18. Enclose the rectangles with a 38-cm-long iron wire so that their length and width are whole centimeters, and there can be () kinds of enclosing methods.

a、7 B、8 C、9 D、 10

19. The decimal point of the number moves one place to the right, which is 59.94 larger than the original number. This number is ().

a、6.66 b 1 1.66 c 66.6d 1 16.6

20. 100 cups are packed in a box, and the number of each box is different. If the box is not empty, at least () cups are needed.

a、 100 B、500 C、 1000 D、5050

Fourth, simple calculation and calculation. (Write the simple calculation process of 2 1 ~ 24 questions, ***25 points, 5 points for each small question)

2 1.395-283+ 154+246- 1 17

22.8795-4998+2994-3002-2008

23. 125× 198÷( 18÷8)

24.2772÷28+34965÷35

25. Three squares are stacked together, as shown in the figure. Found: ∠ 1 degree.

Fifth, solve the problem. (**35 points, 7 points for each small question).

26. My grandfather is 75 years old, and the ages of his three grandchildren are 17, 15 and 13 respectively. How many years will it take for the three grandchildren to be equal to my grandfather's age?

27. Wang Xue read a story book. On the first day, he read eight pages, and then read three more pages than the day before. On the last day, he finished reading 32 pages. How many days did she study?

28. The school bought some badminton and distributed it to all classes in the school. If every class has 16, it's just over; Give two classes less, each class gets 1, and the remaining 10. How many badminton players are there in the class?

There are 78 kinds of chrysanthemums, roses and tulips in the flower shop, of which chrysanthemums are twice as many as roses and roses are three times as many as tulips. How many flowers are there in each of these three kinds of flowers?

30. To transport 58 tons of goods from City A to City B, if it is transported by a large truck with a load of 5 tons, the freight rate is 150 yuan; Shipment by medium-sized truck with a load of 2 tons, freight 80 yuan; Shipment by van, load 1 ton, freight 50 yuan. How many trucks, medium trucks and small trucks do you need to ship the goods at once with the least money? (only fill in numbers, not formulas)

Large trucks (), medium trucks () and small trucks ()

Attachment: Reference answer:

Fill in the blanks. (**20 points, 2 points for each small question)

1.22 2.998 3. 19 4.225×525×( 16)

5.5×[(8+ 16)÷4-2]=20 6.8 7. 130022

8.407 9.(5)×(2 1)×(22)=( 1 1)×( 14)×( 15)

10.

Second, judge. (** 10, 2 points for each small question)

1 1.× 12.× 13.√ 14.√ 15.×

Third, choose. (** 10, 2 points for each small question)

16.B 17。 D 18。 C 19。 A 20. D

Fourth, simple calculation and calculation. (**25 points, 5 points for each small question)