Name score

I. Fill in the blanks (20 points)

1.26048 million is written as (), and if it is rewritten as "ten thousand", it means () ten thousand.

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

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

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

Dad said, "My age is four times that of Xiaoming." Xiao Ming said, "I am one year old." Use a formula containing letters to represent dad's age, write (); If Xiaoming is 8 years old this year, then Dad is () years old this year.

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

7.⊙()=()⊙60 = 2:5 =()% = ().

8. In 3.0 14, 3.3 14%, 3. 1 and Uyghur, the maximum number is () and the minimum number is ().

9. The circumference of a circle is 12.56 cm, and its area is () square cm.

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

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

1. The radius of a semicircle with circumference l is ().

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. 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 (). a . 2400÷70% b . 2400×70% c . 2400×( 1-70%)

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

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

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. ( )

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

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?

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

Five, first look at the chart, and then ask questions (5 points)

The output value of a factory in the fourth quarter is 200 1 1.

Question 1:

Column type:

Question 2:

Column type:

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?

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?

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?

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?

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?