Name-Class-Grade-

First, fill in the blanks.

1, one percent of the integer part of a decimal is two, one thousandth of the decimal part is 1, one tenth is four, and the rest are all zeros. This decimal is written as ().

2. If the decimal point of 0.057 is removed, its value will be magnified () times.

3. The length of each side of the square is expanded by 3 times, the circumference by () times and the area by () times.

A triangle with three equilateral sides is called a () triangle, and each angle of it is () degrees.

5. When two rays come out from a point, they form a (). This point is called (), and these two rays are called ().

6. The rectangle is 26 cm in circumference, 40 cm in area and () cm in length.

7. If the perimeter of a square is expanded by 2 times, the side length of the new square is () times that of the original square, and the area of the new square is () times that of the original square.

8. Nail a rectangle with a piece of wood and pull the vertices of its two corners by hand to make it a parallelogram, then the area of () will be large.

9. The side length of a square is 10 meter. If the side length is reduced by 2 meters, the area will be reduced by () square meters.

10, the circumference of the rectangle is 32cm, the aspect ratio is 2cm, and the area is () cm^2.

1 1, in the figure on the right, it is known that ∠A=60, ∠B=90, ∠C=30, and A 1.

Find ∠ 1= (), ∠2= ().

2

B.C.

Second, the judgment question.

A quadrilateral with 1 and four equilateral sides must be a square. ( )

Two straight lines intersect, and one of the angles is a right angle. These two straight lines are called perpendicular to each other. ( )

3. If the perimeter of a rectangle is equal to the perimeter of a square, the area of the rectangle is smaller than that of the square. ( )

The circumference of rectangle is 24 cm. If divided into two squares on average, the circumference of each square is 12cm. ( )

Third, the calculation problem.

( 1)28 - [ 19.08 + (3.2 - 0.299 ÷0.23)]×0.5 (2) 64× 1.25×2.5×5

( 3 ) 34.5×9.23-34.5 + 1.77×34.5 (4) (67.8 + 9.48)÷0.96-2.58×3.35

Fourth, draw parallel lines on both sides through a point P in ∠ABC, and then use point P as the vertical line of BC.

A

B.C.

Fifth, the application problem.

1, the average price of three kinds of cloth is 0.45 yuan per foot, A is 8 points more expensive than C, and B is 4 points more expensive than C. How much are all kinds of cloth?

2.5 tractors cultivated for 24 days10.2 million mu. /kloc-how many tractors do you need to plow 54000 mu in 0/8 days?

3. Square banana garden, with side length of 84m, banana trees spacing of 2m and row spacing of 8m. If each banana tree receives 65 kilograms of banana fruit at 0.45 yuan per kilogram, how much can this banana garden earn a year?

4. The transportation speed of Dongfeng truck is 2.5 times that of tractor, and the transportation speed of large truck is 3 times that of Dongfeng truck. It takes six hours for Dongfeng truck to transport a pile of goods. How many hours does it take to transport half by tractor and the other half by truck?