Add a () after it.

2. A bag of flour weighs 50 kilograms, and 80 bags of flour weigh () kilograms, which is () tons.

3. The school runway is 400 meters per lap, and Xiao Ming ran five laps, which is () kilometers.

4.3 tons = () kilograms, 5 kilometers = () meters.

400 decimeters = () meters 9000 kilograms = () tons

5. Translation and rotation are the motion modes of objects, for example, () and () are planes.

Displacement phenomenon, (), () is a rotation phenomenon.

6. There are () days in February this year, and () weeks and () days throughout the year.

7. Multiply two numbers, one factor is unchanged, the other factor is expanded by 10 times, and the original product is expanded ().

Times; If these two factors expand 10 times at the same time, then the original product expands () times.

Second, judge. (Mark "√" for the right and "×" for the wrong). (5 points)

The product of 1 has two zeros at the end. 60×50.( )

2. The product of two digits multiplied by two digits must be four digits. ( )

When two numbers are multiplied, the product may be greater than any factor. ( )

The speed of the car is 80 kilograms per hour. ( )

5. 1kg cotton is lighter than 1kg rice. ( )

Third, multiple choice questions. (Fill the letters of the correct answer in brackets) (5 points)

1. The action of raising and lowering the national flag is ().

A. rotation B. translation C. translation and rotation

2. The formula for numbers greater than 1800 and less than 2800 is ().

A.29×53 B. 76×49 C.37×65

3. It is estimated that the answer of 63× 12 may be correct ().

A. 1536

4. A watermelon weighs 5 ().

BP

5. The railway from Beijing to Guangzhou is 23 14 ().

American commercial bank

Four, calculation (35 points)

1. (5 points)

94× 10= 56×50= 30× 15= 50×40= 38×20=

900÷9= 800÷4= 390÷3= 0×50= 9 18÷9=

2. Vertical calculation shall be adopted, and those with "※" shall be checked. (12)

24×25= 15×28

605÷5= 45×60=

※45×28= ※45×28=

3. Off-mold calculation. (18)

4×25×4 87÷3×29 250÷5×80

(85-3 1)×84 168÷4× 19 654÷(56-50)

Fifth, the operation problem.

1. Draw three views of the following stereogram. (3 points)

2. Move and draw a picture. (6 points)

(1). It will move 7 squares to the right.

(2). It will translate 6 squares down and then 8 squares to the left.

Sixth, solve the problem. (1~ 5 points for 4 questions, 6 points for 5 questions, 26 points)

1. The school canteen brought 300 Jin of rice and ate 220 Jin. The remaining rice was eaten in two days on average.

How many kilograms do you eat every day?

Two workers made 576 molds in three days. How many molds does a worker make a day?

There is a road 8000 meters long. How many meters is left for a road repair team to repair for 20 days every day?

A water tower is 30 meters high, and the height of a TV tower is 12 times that of this water tower. How many meters is the TV tower higher than the water tower?

Mingming's home, Lele's home and the school are on the same road. Mingming's home is 2 kilometers away from the school and Lele's home is 800 meters away from the school.

(1). What is the farthest distance between Mingming's home and Lele's home?

(2) What is the nearest distance between Mingming's home and Lele's home?