( 1)6. 15km =()m 1:45 =()

(2) 34.864864 ... In short, it is (), and the three decimal places are about ().

(3) There are m kilograms of apples in the fruit shop, and 6 kilograms are sold every day, and there are () kilograms left after X days.

(4) The product of 4.6× 0.02 is a decimal (). If the factor of 0.02 is expanded to 100 times, the product should be made.

Constant, the decimal point of another factor should be ().

(5) The area of a triangle with a height of 4cm is equal to the area of a square with a side length of 4cm, and the base of the triangle is ()

(6) A school assigns each student a library card number. If the mantissa is set to 1 for boys and 2 for girls,

For example: 9740 1 1 means 1997, the student in Class 4, 1, is a boy, then 1999.

The card number of the female student No.29 who entered Class One is ().

(7) fill in ">"

7.2 1○7.2 12 4.933○4.93 2.8÷0.6○2.8 0.45× 1.05○0.45

(8) The upper bottom, the lower bottom and the height of the right-angled trapezoid are 10dm, 12dm and 8dm respectively, and its area is

() Square decimeter; Draw the largest square in the trapezoid, and the area of the square is () square decimeter.

(9) Master Wang processes one part and 20 parts in 5 minutes, so Master Wang needs 1 part to process on average.

It takes () minutes, 1 minute to process () pieces of this kind of parts.

(10) There are two white balls, three red balls and five blue balls in a box. Touch a ball from the box, there may be ().

The result is most likely to hit the () ball, and the possibility is ().

(1 1) A road is 2400 meters long. From the starting point to the end point, a pole should be erected every 40 meters.

(12) known1÷ a = 0.0909 ...; 2÷A = 0. 18 18…； 3÷A = 0.2727…； 4÷A = 0.3636…；

Then the quotient of 9÷A is ()

( )

( )

( )

( )

( )

Second, the judgment question

1, a2 and 2a have the same meaning.

2. The graphics seen from the top, front and left are the same.

3, a cube thrown into the air, after landing, the possibility of each face up is

4. Add or subtract the same number on both sides of the equation at the same time, and the equation holds.

5. Two triangles with the same area can be combined into a parallelogram.

Third, multiple choice questions. (5 points)

1, each empty bottle can hold 2.5 kilograms of salad oil. Miss Wang needs at least () bottles to put 25.5 kilograms of salad oil in such bottles.

a、 10 B、 1 1 C、 12

2. A rectangle nailed with four pieces of wood is drawn as a parallelogram, and its () remains unchanged.

Area A, Area B, Perimeter Area C, Area and Perimeter

3, the following graphics can't close shop is ()

A, regular pentagon b, regular hexagon c, regular triangle

4, a figure composed of building blocks, from the front or from the side, this

There are () building blocks.

A, 4 B, 6 C, not necessarily

5. In the picture on the right, two triangles (indicated by shading) are drawn in two squares with equal sides.

Their area is compared with ()

A, A has a large area, B has a large area, and C is equal.

Four, calculation (23 points)

1, the number written directly (5 points)

3.5×0. 1= 43÷0. 1= 200×0.04= 12- 1.2= 1.3×0.5=

0.42÷0.6= 6.3÷0.7= 0.2 1×0.3= 5.69÷0.5= 5.5÷ 1 1=

2, solve the equation (6 points)

5x-2+ 1.8 = 3.6 7(x- 1.2)= 2. 1

3, off-type calculation (can be simplified) (12 points)

17.64÷4.9+6.73 3.4÷〔( 1.2+0.5)×5〕

1.9+ 19.9+ 199.9+0.3 0.25× 12.5×3.2

moon

one

two

three

four

five

six

Power consumption/kWh

8 1

Eighty-five

65

55

47

63

A

B

C

3 meters mile

4 meters and miles

5 meters mile

Five, column comprehensive formula or equation calculation (8 points)

(1), the sum of 3.9 times a number and 2.5 times it is 16. What's this number?

(2) What is the quotient of 8.28 divided by the product of 3.6 and 0.5?

Six, operational problems (7 points)

1. Please draw a shadow map with the same area but different shapes in the second, third and fourth pictures as the shadow part of the first picture.

(3 points)

2. Draw the height on the side of BC first, and then calculate the length of this height.

Seven, statistics and analysis (5 points)

The monthly electricity consumption of Xiaoming's family in the first half of last year is as follows (electricity consumption unit: kWh).

1. What was the average monthly electricity consumption in the first half of the year?

2. What is the median of these data?

3. Why is the median smaller than the average?

Eight, solve the problem. (25 points)

1. The Spring Festival is coming. A supermarket bought 540 small Chinese knots, 60 less than 4 times that of big Chinese knots. How many big Chinese knots did the supermarket buy?

2. A kind of iron wire is 20 meters and weighs 5 kilograms. If a bundle of the same wire is150kg, how long is this bundle of wire?

3. The railway from A city to B city is 312km long. The express train used to take 5.2 hours, but now it only takes 3.9 hours. How many kilometers more than the average hour in the past?

4. The original price of a ballpoint pen is each 4.8 yuan. After the price reduction, each ballpoint pen is cheaper in 0.3 yuan. I used to need 150. How many pens can I buy now?

Below is a wall with a window 2m long and1.5m wide in the middle. If you build this wall with 160 bricks per square meter on average, how many bricks would you use?

4 meters

1.4m

5 meters