I'll fill in (22 points)

1, 1 ton = () kg 1 km = () m.

40 cm = () decimeter 7 cm = () mm

2. Fill in the appropriate unit name.

Xiaoming's height is 140 (), and his math book is 7 ().

A truck can carry 5 (). The Yangtze River is about 6200 () long.

Step 3 put ">"

1 ton ◆ 990kg 96700kg ◆ 7 tons

1 decimeter ○ 1 cm 8000m ○ 8km

4.3000m+4000m = () km 1m-4 decimeter = () decimeter.

3500 kg -500 kg = () kg 800 kg +200 kg = () tons

5. What is the maximum number of words in brackets?

( )×2< 15 9×( )