Fill in the blanks. ( 16%)

For 1 and 8.745, one decimal place is (8.7), and 0.398 is accurate to one percent (0.40).

2, 3 10.04 pronunciation (310.04); Write it at 0.307 (0.307).

3.5.903 consists of (5) 1, (9) 0. 1 and (3) 0.00 1.

4. Move the decimal point three places to the right and then two places to the left. This number is 40.9. It turns out that this decimal is (40.9).

5. Triangle has (stability); The sum of the interior angles of the triangle is (180).

6. When calculating 48× 98+48× 2, the multiplication distribution law can make the calculation simple.

7. Without changing the number size, rewriting 4.5 into three decimal places is (4.500).

8. The base angle of an isosceles triangle is 35 and the top angle is (1 10).

9. A piece of wood is 6 meters long and needs to be sawed into 4 sections. Saw for 5 minutes in each section, one * * *( 15) minute.

Second, the judgment question. (Correct drawing "√" and incorrect drawing "×") (6%)

When 1. represents an approximation, the zero after the decimal point cannot be deleted. ……………………( × )

2. The multiplication and division method is expressed by letters as (a+b) × c = a× c+b× c ……………………………………………………………………………………………………………………………………………………………………………… (√).

3. Every inner angle of an equilateral triangle is 60 degrees. ………………………………………( √ )

4. The minuend is equal to the minuend, and the difference must be 0. …………………………………………( √ )

Three identical right triangles can be used to form a trapezoid. ……………………( √ )

6,0.078 expansion 100 times is 78. ……………………( × )

Third, multiple choice questions. Fill in the brackets with the correct answers. )(6%)

1, the sum of any two sides of a triangle (②) the third side.

① equal to ② greater than ③ less than ④ greater than or equal to.

2, 0.0385 accurate to (4) is 0.039.

① Decimal ② Percentile ③ Bit ④ thousand.

3. The number less than 6.98 is (④).

① 7 ② 6.980 ③ 6.99 ④ 6.890

4. Calculate 78×99 as (②) by a simple method.

① 78× 100+78× 1 ② 78× 100-78

③ 78× 100+ 1 ④ 78× 100- 1

5. Rewriting 13 0.00 1 into decimal is (③).

① 0. 13 ② 0. 130 ③ 0.0 13 ④ 0.00 13

6. There is a chicken, a duck, a goose and a dog, each weighing 28kg. Chickens are as heavy as ducks, geese are three times as heavy as ducks, and dogs are three times as heavy as geese. Goose weight (③).

① 2kg ② 8kg ③ 6kg ④ 18kg

Fourth, calculation.

1, oral calculation. (13)

0.36+0. 14= 7.2-5.8= 1-0.4=

1-0.08= 4.8+3. 12= 0.0 1+0. 1=

3.9+4.4+5. 1= 4.7-0.47- 1.43= 102×5=

25× 17×4= 120÷5÷2= 20-20÷5=

2, with vertical calculation, and checking. (6%)

48.5+47.25= 20.8-6.48=

3. Use a simple method to calculate. (8%)

6.3+6.44+2.7+3.56 15.35-(5.35+7.2)

600÷ 12 67× 102

4. calculation. ( 16%)

(58+76)× 12 (450- 125)×(82-64)

(200+350)÷ 1 1×38 720-(750÷ 15+248)

5. Column calculation. (8%)

(1) 148 and the sum of 48 divided by their difference. (2) A number is 3.2 more than 13.86. this

What is the quotient? What is the number?

Fifth, solve the problem. (28%)

(1) A road maintenance team will build 630m roads in three days. According to this calculation, how many kilometers of roads can be built in 15 days? (4%)

(2) Universal Travel Agency organized a five-day tour of Jiuzhaigou, with 360 people in the morning and 240 people signing up in the afternoon. If every 60 people take a car, how many station wagons do you need this time? (4%)

(3) When Children's Day arrived, the school put a square flower bed. There are 20 pots of flowers on both sides of the outermost layer of this flower bed. How many pots of flowers are put on the outermost layer? (4%)

(4) Mark the location of each building on the floor plan. (100 m is represented by 1 cm) (8%)

(1) The school is just south of the railway station 150m.

(2) The cinema is 300 meters east of the railway station, with a distance of 250 meters.

(3) The post office is 400 meters northwest of the railway station platform, with a distance of 200 meters.

(4) The supermarket is just north of the railway station 100 meters away.

(5)

The table below shows the home computer ownership of the students in Class One, Grade Four.

2006, 2007, 2008 and 2009

Have a computer (Taiwan Province) 8 15 26 40

According to the mathematics in the table, complete the following statistical chart.

2006 2007 2008 2009