Fill in the blanks. (57 points) Name

1, the land area is usually measured in (), and the larger land area is calculated in ().

2. The commonly used area units are arranged as () from small to large, in which the ratio between square meters and hectares is () and the ratio between hectares and square kilometers is ().

3. Fill in the appropriate unit name in brackets.

(1) The area of the cover of the math textbook is about 5 ().

(2) The West Lake in Hangzhou covers an area of about 650 ().

(3) Tiananmen Square in Beijing is the largest square in the world, with an area of about 44 ().

(4) The total area of the three northeastern provinces is about 80 ().

(5) The area of a basketball court is 420 ().

4. Fill in the appropriate numbers in the brackets.

3 hectares = () square meters 10000 square meters = () hectares

4000 hectares = () square kilometers 20 square kilometers = () hectares

6500 hectares = () square decimeter 9 square kilometers = () hectares = () square meters.

2 1 m2 = () square decimeter = () square centimeter

Second, judge. (Mark "√" for the right and "×" for the wrong) (18)

1 square land, side length 1000m, area 1km. ( )

2. The propulsion rate between hectares and square meters is 100. ( )

3. A square with a side length of 4m has the same perimeter and area. ( )

4. A square piece of land with a side length of 100 m and an area of 1 hectare. ( )

5, measuring land area commonly used hectares and square kilometers as the unit. ( )

6. The screen area of a computer is about 780 hectares. ( )

Third, solve the problem. (25 points)

1. Uncle Li contracted a 2-hectare peach garden. If you can plant 1 peach tree every 4 square meters,

So how many peach trees can be planted in this peach garden?

A highway is 420km long and 50m wide. How many hectares is this highway? How many square kilometers?

3. A harvester travels 6 kilometers per hour, and the width of harvesting is 2 meters. How many hectares of wheat can this harvester harvest when it works five hours a day?

Tongxiang Street Central Square covers an area of 9 hectares. If the floor is paved with square tiles with a side length of 30 cm, how many tens of thousands of tiles do you need?

A rectangular pasture is 8 kilometers long. It takes uncle Zhang half an hour to drive around at 60 kilometers per hour. How many hectares is this pasture?