Name score

I. Fill in the blanks (20 points)

1.26048 million is written as (2|6004|8000), and the number rewritten as "10,000" is (260048000) million.

2,0.667,0.76 and 68%, the maximum number is (076) and the minimum number is (0.667).

3. The largest three digits that can be divisible by 2, 3 and 5 at the same time is (960).

4. When the ratio of boys to girls in a class is 4:5, boys account for 4\9 and girls account for 5\9 of the class.

Dad said, "My age is four times that of Xiaoming." Xiao Ming said, "I am one year old." Write (4a+3); By using a formula containing letters, the father's age is expressed; If Xiaoming is 8 years old, then his father is (35) years old.

6. If a number is divided by 6 or 8 is greater than 2, the minimum number is (50); A number divided by 160+4 and 240+6, the maximum number is ().

7.2 ÷ (5) = (24) ÷ 60 = 2: 5 = (40)% = (85).

8. In 3.0 14,3,314% and 3. 1, the maximum number is (π) and the minimum number is (3.014).

9. The circumference of a circle is 12.56 cm and the area is (12.56) cm 2.

10. If a = b/c (c ≠ 0), then (b) is a constant, and (c) is inversely proportional to (a); (c) At a certain moment, (b) and (a) are in direct proportion.

Two, multiple-choice questions (fill in the serial number of the correct answer in brackets) (5 points)

1. A semicircle with a circumference of l and a radius of (c).

a . l÷2÷3÷c . l÷4÷4÷5÷5÷5÷5÷6÷5÷6÷6÷6÷6÷6÷6÷6÷6÷6÷6÷6÷7

The value of 2.3/ 12 is a (c).

A. finite decimals B. cyclic decimals C. infinite acyclic decimals

The original price of a refrigerator is 2400 yuan, and now it is 30% off. What's the current price? The formula is (c). a . 2400÷70% b . 2400×70% c . 2400×( 1-70%)

4. In the next few years, (c) is a leap year. In 2000

5. In the following categories, A and B are inversely proportional to each other (C).

A.a×b= 1 B.a×8=b C.9a=6ab

Three. True or false (tick correctly in brackets, x incorrectly) (5 points)

The ratio of 1.6kg: 7kg is 6/7kg. (√" )

2. Time is fixed, and distance is directly proportional to speed. (√")

3. The false score must be greater than the true score. (10)

The denominator of a fraction contains a prime factor of 2 or 5, and this number must be reduced to a finite decimal. (10)

5. If the volume of a cone is 4 cubic decimeters, then the volume of a cylinder with equal bottom and equal height is 12 cubic decimeters. (√" )

4. Calculation questions (35 points).

1. Numbers written directly (5 points)

127+38= 8.8÷0.2= 2- 1/4 = 12× 1/3 =

1÷7+2 = 1- 1× 1/4= 1.02-0.43= 1÷25%×25=

2. What can be simplified should be simplified (6 points)

①9 -0.64-0.36 ② 1.8× 1/4+2.2×25%

①6.25-40÷ 16×2.5

3, solve the equation (6 points)

7.5:x=24: 12 3x-6 =8.25

4, column calculation (6 points)

(1) What's the difference between 8 and 4 divided by 2?

(8-4)÷2

(2) 15 is four times smaller than a number. What is the number?

4x- 12= 15

Six, the application problem (30 points) (1-5 small 4 points, 6-7 small 5 points)

1, Master Wang processed a batch of parts. It was originally planned to process 30 pieces per hour, which can be completed in 6 hours. In fact, the processing capacity per hour is 20% more than originally planned. How many hours are the actual processing of these parts ahead of schedule?

30x60 ÷ 1+20%

2. Cylindrical oil drums with an inner diameter of 40 cm and a height of 50 cm. If diesel weighs 0.85 kg per cubic decimeter, how many kg of diesel can this oil drum hold?

(40÷2)2X3. 14X0.85

Wang flew to the library in the mountains to borrow books. He climbed the mountain at a speed of 3 kilometers per hour and returned from the original road at a speed of 6 kilometers per hour. Ask him for the average speed of going up and down the mountain.

The bus and truck run in opposite directions from the midpoint of A and B at the same time. Five hours later, the bus arrived at A, and the truck was 60 kilometers away from B. It is known that the speed ratio of the truck to the bus is 5:7. How many kilometers is it between A and B?

5. Hope Primary School originally planned to buy 12 rubber balls at 0.84 yuan each. Of the money spent on this ball, 1.68 yuan spent it on skipping rope. How many rubber balls can I buy with the remaining money?

12X0.84- 1.68÷0.84

6. There is a batch of goods in the warehouse, and the weight ratio of the transported goods to the remaining goods is 2:7. If 64 tons are transported, the remaining goods are only 1/9 of the original goods in the warehouse. How many tons are there in the warehouse?

2+7=9 64- 1x9

7. Party A and Party B jointly completed 242 machine parts. A it takes 6 minutes to make a part, and B it takes 5 minutes to make a part. When they finished this batch of parts, how many parts did each of them make?

242÷ 1/6 242÷ 1/5

Fill in the blanks

The unit of 1 and 2065 10000 is (2065 10000), rounded to "1 100 million" is (200 million).

2. The smallest number divisible by15 and 18 is (3), which is called the (common factor) of these two numbers.

3. Triangles and parallelograms with equal bases and equal heights, with an area of 25m2 for triangles and 50m2 for parallelograms.

4.A number is 25% of B number, and B number is (4) of A number.

5. The largest six-digit number consisting of three "0s" and three "6s" is (660), which is pronounced as (660).

Numbers that read only one zero are (606) and (6006).

6, a fraction, the numerator is smaller than the denominator 18, and the fraction is followed by 2. The original score was (42 minutes and 24 minutes).

7. There were * * () days in the first quarter of 2008 and * * () days in 2 100.

8、0.875=( ):40= =2 1÷( )=( )%

9, three consecutive even numbers, the middle number is m, then the two adjacent numbers are () and () respectively.

10. In a proportion, two internal terms are reciprocal, one is the smallest prime number and the other is ().

1 1, A× 3 = B×, then A: B = (): (), if 4x = Y, then the relationship between x and y is ().

12,, 33.3%, 0. ">" connection,, is ().

Second, the judgment question.

1 and coprime may not be prime numbers. ( )

2. The approximation of two numbers must be less than either of them. ( )

3. If A is divisible by B, then A is a multiple and B is a divisor. ( )

The price of a commodity will increase by 20% first, then decrease by 20%, and the price will remain unchanged. ( )

5. An angle less than180 is called an obtuse angle. ( )

6. The false score is greater than 1. ( )

7. If A is greater than B and B is less than A .. ()

8. The radius of a circle is half its diameter. ( )

9. Axisymmetric graphics are folded in half along any straight line, and the two parts can overlap. ( )

Third, multiple choice questions

1, a fractional molecule is enlarged by 6 times, and the denominator () and fractional value will decrease.

A, expand 8 times b, shrink 8 times c, shrink d, expand.

The prime factor of 2, 50 decomposition can be written as ()

a、50= 1×2×5×5 B、2×5×5 = 50°C、50=2×5×5 D、50=2×25

3. A gear with a diameter of 48cm drives a gear with a diameter of 26cm (meshing with each other). If the big gear turns 12 turn, the small gear turns () turn.

a、24 B、 16 C、 12 D、9、

4. The simplest fraction with denominator of 9 is ().

a、8 B、6 C、9

The highest rank of the quotient of 5.7.56 ÷ 0.85 is ().

A, unit B, tenth C, tenth D, percentile

Fourth, the calculation problem

1, the number is written directly.

0.5÷0.0 1= 42× 10%= 2.9+7. 1=

0÷ 1 = × + = 1-0.025÷ =

1- -0.25= 100 1×99-99= 1.25× 1.5×8=

2. Off-mold calculation can be simplified.

×〔 ÷( - )〕 3 ×3 +3.4×6.625

1 ×7.3×5 + 1 ×7.3×2 ( + )÷

2005× 2004 ÷4

3. find the unknown X.

= (4-x)×2=8

0.4x+3×0.4=30× : =:

4, column calculation

& lt2> The sum of a number is 1 less than the maximum two digits. What's this number?

1, the radius of the circle is equal to the radius of the sector. It is known that the area of a circle is 30 square centimeters and the central angle of a sector is 36o. Find the area of the sector.

(30÷3. 14÷2)2x 3. 14x 360÷360

2. For a project, Party A will do it for 2 days and Party B will do it for 3 days. If the whole project is completed, Party A will do it for 3 days. If the rest of the projects are completed, Party B will do it last. How many days does it take Party B to finish this work?

2+3=5 5÷( 1/2+ 1/3)

A motorcade carrying a batch of relief materials was originally planned to travel at a speed of 40 kilometers per hour and arrive at the disaster area after 7.5 hours. Actually, it is 10 km per hour, so how many hours did it take to reach the disaster area?

÷

4. Make a cylindrical water tank without a cover with iron sheet. The bottom is 20 cm in diameter and 24 cm in height. How many square decimetres of iron do you need to make this water tank? What is the volume of this water tank?

Volume: (20÷2)x3. 14X24 surface area: 20x3.14x24+(20 ÷ 2) x3.14.