1, measuring the distance from Huizhou to Beijing, usually using () as the unit is more appropriate, and can be represented by the letter ().

2. Xiaoyang's height is 8 decimeters. If he is longer than () decimeters, his height is exactly 1 meter.

3, naughty home to school is about 3000 () (fill in? Rice? Or? Kilometers), or () kilometers.

4. 1 cm has () cells, and the length of each cell is ().

5. Fill in the appropriate units.

Xiao Ming is 1 1 (). This vase is about 30 () high.

Knife length 5 (), train speed 120 ().

The thickness of a math textbook is about 1 () and the length of a skipping rope is about 3 ().

Bicycles travel about 500 () miles per minute. A building is 45 () high.

6. Fill in ○? & gt？ 、? & lt？ Or? =? .

8 decimetres, 2 metres, 50 millimetres, 3 centimetres, 4,000 metres, 4 kilometres.

700 cm 7 m 800 m 1 km 37 mm 3 m 7 mm

Second, use vertical calculation. (8 points)

58? 6= 29? 5= 47? 8= 35? 7=

Third, unit conversion. (*** 18)

600 cm = () m 3 m = () decimeter 7 km = () m.

20mm = () cm 5000m = () km 4m = () cm。

5000 meters = () kilometers 8 centimeters = () millimeters 80 decimeters = () meters.

Fourth, the judge. (That's right. Draw in brackets? , wrong painting? ) (* * *12 points)

1, and the width of the math textbook is about 145 cm. ( )

2. 1 km = 10m, 1 m =10 decimeter. ( )

3. Mingming's height is 150cm, which means 15dm. ( )

The plane flies 800 meters per hour. ( )

5. 1 piece is about 2cm thick. ( )

6. The Yangtze River is the largest river in China and the third largest river in the world, with a length of about 6,380 meters. ( )

5. Read, measure and draw a picture. (1 1, of which the third title is 5).

This rubber is () mm long.

1、

2. Measure how long it is.

() cm () mm

3. Draw a line segment with a length of 35mm.

Sixth, from big to small. (12)

56 mm 2 m 4 cm 5 mm 1 km 1002 m 32 DM

Seven, solve the problem. (18)

1, Xiaojun's height is1.45cm, Xiao Qiang's height is1.65cm, and how many centimeters is Xiao Qiang taller than Xiaojun?

A piece of cloth is 60 decimeters long, and it takes 9 decimeters to make a suit. How many suits can you make at most?

Mother cut a ribbon into equal sections and cut it four times, each section is 8 cents long. How long is this ribbon? How many meters?

Eight, additional questions. (10)