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

1. It is reported that the severe impact of Typhoon Morakot No.8 caused direct economic losses of 993.7 million yuan to Wenzhou, which was rewritten as () million yuan, and the mantissa after omitting 1 100 million yuan was about () million yuan.

2. A decimal number has seven digits, millions and hundreds have five digits, and other digits have zero digits, which is called (), and this number is ().

3. 1 fillet = () right angle = () right angle.

4. How much can I fill in the right ()? ()×24 & lt； 100 53×()& lt； 302

At 5.4 o'clock, the angle between the hour hand and the minute is ()? ; At 6 o'clock sharp, the angle between the hour hand and the minute hand is ()? .

6. Let the quotient of 4□6÷46 be a two-digit number, and the smallest of □ can be filled in (). The quotient is a single digit, and □ can be filled in ().

7. put ">" in the last line. , "<, or" = ".

3654879 03654897 26900 100000270,000.

480÷ 12〇480÷30 18×500〇50× 180

8. The product of two numbers is 240. If one factor remains the same and the other factor decreases by 10 times, the product is ().

9. When A ÷ 15 = 14...b, the remainder b can be () and the dividend a is ().

10. A dictionary needs 39 yuan, and Mr. Wang Can can buy () such a dictionary at most for 376 yuan.

2. Judgment: Put "√" in brackets for the right and "×" for the wrong. (65438+ 0 points for each question, ***5 points)

1. The angle has nothing to do with the length of the side, but with the size of both sides. ………………………( )

2. In the integer bit sequence table, the advancing rate between any two counting units is 10. ……………( )

3. The obtuse angle must be greater than the right angle, and the angle greater than the right angle must be obtuse. …………………………( )

4. Rectangle is a special parallelogram. ………………………………………………( )

5. When two numbers are divided, the divisor is multiplied by 10, and the divisor is divided by 10, and the quotient remains unchanged. ………………( )

3. Choice: Fill the serial number of the correct answer in brackets. (65438+ 0 points for each question, ***5 points)

1. Among the following figures, the one that doesn't read zero is ().

a、 10 10 10 10 10 B、 1 100 100 C、 1 1 100 10

2. The mantissa after omitting 59296500 and "ten thousand" is about ().

A, 5930 B, 59.29 million C, 59.3 million.

3. It is estimated that the quotient closest to 9 in the following formula is ().

a、434÷5 1 B、632÷7 1 C、520÷60

The remainder of 4.230 ÷ 50 is ().

A, B, C, 300

5. Two identical triangles can definitely be combined into one ().

A, parallelogram b, rectangle c, trapezoid

Part II Basic Skills (***38 points)

Fourth, write numbers directly. (Each question 1, *** 12)

60×8= 24×30= 96÷6= 70× 12=

0÷32 = 540÷6= 18×50= 420÷70=

39×4 1≈ 695×7 1≈ 6294÷7 1≈ 479÷8 1≈

5. Calculate the following questions vertically. (3 points for each question, *** 18 points)

128×25= 8 16÷5 1= 130×70=

2880÷64= 30 1×36= 230÷ 15=

6. Draw a picture and fill it in. (***8 points)

1. Draw a 105 with a protractor? Angle.

2. It is known in the right figure that ∠ 1 = 43, ∠2= () and ∠3= ().

3. Draw the height at the bottom of the parallelogram.

The third part to solve the problem (***32 points)

Seven, solve the following problems. (5 points for each question)

1. There are 52 rows of stands No.5 in Huanglong Gymnasium, with 35 seats in each row. How many people can sit in this stand?

2. A school launched a power-saving activity, saving 424 degrees of electricity in the first four months. According to this calculation, how many kWh can be saved in one year (65438+February)?

3. Fruit shop Li took 2000 yuan to buy apples in the wholesale market, bought 25 boxes, and left 150 yuan. What is the wholesale price of apples per box?

4. Teacher Chen went to the sporting goods store and bought 12 basketballs. The price of each basketball was 63 yuan. She also spent 240 yuan to buy 8 volleyballs. How much did Mr. Chen spend?

The school wants to order 24 TV sets and 45 computers. Each TV set needs 2 100 yuan, and each computer needs 3,400 yuan. The school has prepared 200,000 yuan. Is that enough?

Eight, observe the statistical chart, and then complete the question. (***7 points)

Statistics on the number of boys and girls in extracurricular interest groups in Xinxing Primary School in September 2009

1. It can be seen from the figure that group () has the largest number of boys and group () has the smallest number of girls. Group () has the largest number of people, and group () has the least number of people.

2. Through calculation, the total number of the three interest groups is (), and the number of boys is more than that of girls (). There are () more people in the math team, just as many as the number of people in the science and technology team.

The fourth part of mathematical thinking (additional 10)

1. A pot can bake at most 2 cakes at the same time, each side needs to bake for 3 minutes, and baking 5 cakes needs at least () minutes; It takes at least () minutes to bake 10 cakes.

2. When Xiaodong does multiplication, one of the factors 42 is taken as 24, and the product obtained as a result is 360 less than the correct product. The correct product should be ().

Reference answer:

The first part of the basic knowledge (***30 points)

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

1. It is reported that the severe impact of Typhoon Morakot No.8 caused direct economic losses of 993.7 million yuan to Wenzhou, which was rewritten as (993.7 million) million yuan, and the mantissa after omitting 1 billion yuan was about (10) million yuan.

2. A ten-digit number, seven-digit number, five digits in millions and hundredths, and zero digits in other digits, written as (7005000500), is a (billion) digit number.

Write: 755 on the draft paper first.

75 000500(*** has 8 digits, 2 digits are missing, and 0 is used to supplement between 7 and 5).

7005000500 (finally, check according to the meaning of the question)

3. 1 fillet = (2) right angle = (4) right angle.

4. How much can I fill in the right ()? (4)×24 & lt； 100 53×(5)& lt； 302

5.4 o'clock sharp, the angle between the hour hand and the minute is (120)? ; At 6 o'clock sharp, the angle between the hour hand and the minute is (180)? .

At 4 o'clock sharp, the angle between the hour hand and the minute hand is 30? ×4

6. If the quotient of 4□6÷46 is two digits, the smallest of □ can be filled in (6), and if the quotient is single digits, it can be filled in (5).

7. put ">" in the last line. , "<, or" = ".

365487927 million

480 \ 12 & gt； 480÷30 18×500=50× 180

8. The product of two numbers is 240. If one factor remains the same and the other factor decreases by 10 times, the product is (24).

9. When A ÷ 15 = 14...b, the remainder b can be (14) and the dividend a is (224).

The remainder must be less than the divisor, and the remainder of is a number less than the divisor by 1.

15× 14+ 14=224

10. A dictionary needs 39 yuan, and Mr. Wang Can can buy 9 such dictionaries at most for 376 yuan.

376÷9=9.6

2. Judgment: Put "√" in brackets for the right and "×" for the wrong. (65438+ 0 points for each question, ***5 points)

1. The angle has nothing to do with the length of the side, but with the size of both sides. ……………………( √)

2. In the integer bit sequence table, the advancing rate between any two counting units is 10. ……………( ×)

In the integer bit sequence table, the advancing rate between every two adjacent counting units is 10.

3. The obtuse angle must be greater than the right angle, and the angle greater than the right angle must be obtuse. …………………………( ×)

Right angles and rounded corners are larger than right angles.

4. Rectangle is a special parallelogram. ………………………………………………( √)

5. When two numbers are divided, the divisor is multiplied by 10, and the divisor is divided by 10, and the quotient remains unchanged. ………………( ×)

The chamber of commerce has expanded 100 times.

3. Choice: Fill the serial number of the correct answer in brackets. (65438+ 0 points for each question, ***5 points)

1. Among the following figures, the one that doesn't read zero is (b).

a、 10 10 10 10 10 B、 1 100 100 C、 1 1 100 10

1010101010, pronounced: one hundred and eleven thousand one hundred and ten.

11001100, pronunciation: 1110.

11100010, pronunciation:110/0.

2. Omit 59296500 and the mantissa after "ten thousand" is about (c).

A, 5930 B, 59.29 million C, 59.3 million.

Thousand digits is 6, rounded to ten thousand digits, and ten thousand digits is 9+ 1.

3. It is estimated that the quotient in the following formula is closest to 9 (b).

a、434÷5 1 B、632÷7 1 C、520÷60

The remainder of 4.230-50 is (b).

A, B, C, 300

5. Two identical triangles can definitely be merged into one (A).

A, parallelogram b, rectangle c, trapezoid

Such two triangles can only be combined into a parallelogram.

Part II Basic Skills (***38 points)

Fourth, write numbers directly. (Each question 1, *** 12)

60×8=480 24×30=720 96÷6= 16 70× 12=840

0÷32 =0 540÷6= 90 18×50=9000 420÷70=6

420÷70=42÷7=6 39×4 1≈ 1600 695×7 1≈49000 700×70≈49000

6294÷7 1≈ 90 6300÷70=630÷7=90 479÷8 1≈6 480÷80=6

5. Calculate the following questions vertically. (3 points for each question, *** 18 points)

128×25=3200 8 16÷5 1= 16 130×70=9 100

2880÷64=45 30 1×36= 10836 230÷ 15= 15……5

6. Draw a picture and fill it in. (***8 points)

1.2.4 omitted

3. It is known in the right figure that ∠ 1 = 43, ∠ 2 = (47) and ∠ 3 = (133).

The third part to solve the problem (***32 points)

Seven, solve the following problems. (5 points for each question)

1. There are 52 rows of stands No.5 in Huanglong Gymnasium, with 35 seats in each row. How many people can sit in this stand?

Solution: 52×35= 1820 (person)

Answer: It can take 1820 people.

2. A school launched a power-saving activity, saving 424 degrees of electricity in the first four months. According to this calculation, how many kWh can be saved in one year (65438+February)?

Solution: 12÷4×424

=3×424

= 1272 (degree)

A: It can save electricity 1272 kWh a year.

3. Fruit shop Li took 2000 yuan to buy apples in the wholesale market, bought 25 boxes, and left 150 yuan. What is the wholesale price of apples per box?

Answer: (2000- 150)÷25

= 1850÷25

=74 (yuan)

A: The wholesale price of apples per box is 74 yuan.

4. Teacher Chen went to the sporting goods store and bought 12 basketballs. The price of each basketball was 63 yuan. She also spent 240 yuan to buy 8 volleyballs. How much did Mr. Chen spend?

Solution: 63× 12+240

=756+240

=996 yuan

A: Teacher Chen spent 996 yuan.

The school wants to order 24 TV sets and 45 computers. Each TV set needs 2 100 yuan, and each computer needs 3,400 yuan. The school has prepared 200,000 yuan. Is that enough?

Solution: 2 100×24+3400×45

=50400+ 15300

= 203,400 yuan (RMB) < 200,000 yuan, and the money is not enough.

Not enough money.

Eight, observe the statistical chart, and then complete the question. (***7 points)

Statistics on the number of boys and girls in extracurricular interest groups in Xinxing Primary School in September 2009

1. As can be seen from the figure, the group with the largest number of boys is the (science and technology) group, while the group with the smallest number of girls is the (mathematics) group, with the largest number of students in the (science and technology) group and the smallest number in the (mathematics) group.

2. Through calculation, the total number of the three interest groups is (139), and the number of boys is more than that of girls (15). Add (22) more people to the math team, which will be as many as the number of people in the science and technology team.

The fourth part of mathematical thinking (additional 10)

1. A pot can bake at most two cakes at the same time, which takes 3 minutes on both sides, and it takes at least (18) minutes to bake five cakes; It takes at least (30) minutes to bake 10 cakes.

Solution: It takes 6 minutes to bake 2 cakes in one pot.

It takes three pots to bake five cakes. (Note that this is not 2.5 pots) It takes 6×3= 18 minutes.

It takes 5 pots to bake 10 cakes. It takes 6×5=30 minutes.

2. When Xiaodong does multiplication, one of the factors 42 is taken as 24, and the product obtained as a result is 360 less than the correct product. The correct product should be (840).

Solution: let's assume that the factor is a.

Then 42A-24A=360

18A=360

A=20

Correct product: 42A=42×20=840.