Class: Name: Student ID: Grade:

First, fill in the blanks. (12)

1. 12 is equivalent to the train speed, and the unit "1" is ().

2. Ton = () kg15min = ()

3. A circle has a diameter of 4cm, a circumference of () and an area of ().

4. 16 is ()% of 20, ()% more than 16.

5.( )÷8 = ( )4 = 0.5 =( )% = ( ):( )。

60% of 6.80 is (); 80% of () is 60.

7. In 3: 2, if the former item is added with 6, the proportion should remain unchanged, and the latter item should be added with ().

8. fill in ">,

2.2× ○2.2 8÷ 12○66.7% 1÷ ○ 1 ×4.4○

9. During the New Year's Day, a sweater with the original price of 100 yuan in a shopping mall was only sold to 85 yuan. After calculation, this sweater is sold at the price of ().

10. Cut the largest circle from a square paper with a side length of 10 decimeter. The circumference of this circle is () decimeter and the area is () square decimeter.

1 1. Coins have 2 cents and 5 cents * * 18, a ***6 yuan dollar. There are () nickels.

12. Divide a circle with a diameter of 4 cm into several equal parts, then cut it open and put it together as shown on the right. The perimeter of the combined figure is () cm longer than the original circle.

Second, judge. (5 points)

1. The ratio of boys to girls in one class is 7: 8, and boys account for the whole class. ( )

The circumference of a circle with a radius of 2 cm is equal to its area. ( )

3.A is more than B 15m, which means B is less than A 15m ... ()

4. A batch of trial-produced products, 120 pieces are qualified, 30 pieces are unqualified, and the qualified rate is 80%. ( )

The ratio of circumference to diameter of all circles is equal. ( )

Third, choose the serial number of the correct answer and fill it in brackets. (5 points)

1. A number is 18, B number is 18, and A number is () B number.

A is greater than b and less than c, equal to

2. Add hundreds of semicolons after the number A (A is not equal to 0), and the number will be ().

A, expand 100 times b, reduce 100 times c, unchanged.

3. Mr. Wang has deposited 3,000 yuan in the bank with a fixed term of 2 years and an annual interest rate of 2.25%, and will receive the principal and after-tax interest of * * * () yuan at maturity.

a、3000 B、3 108 C、 108

4. The figure with the least symmetry axis is ().

A, circle b, rectangle c, square d equilateral triangle

5. There are two circles. The radius of the big circle is 5cm, and the radius of the small circle is 4cm. The area of the small circle is the area of the big circle ().

A, b, c, time

Fourth, calculation. (34 points)

1. Write the number directly. (6 points)

34 ×8 = 23 ÷2 = 9 10 ÷ 35 = 16 × 38 = × = 1÷ =

÷60%= × 15= - = 6.8÷ 10%= 4.5+ = × =

2. Calculate as simply as possible. (18)

49 × 15 ÷ 45 4- - ×58+42÷8

36×(23 + 16 - 34 ) ( 15- 14×47 )×82 1 ÷ - ÷

3. Solve the equation. (6 points)

X \ = X-X = 3

4. Simplify the following ratios. (4 points)

( 1) 12 : 144 (2) 168 (3) 3.6 :7.2 (4)79 :34

Fifth, practical operation. (10)

1. Draw a circle, mark the length of the radius, and then calculate its perimeter and area.

2. Draw the following points in turn to form a closed figure, and then draw its axisymmetric figure according to the axis of symmetry.

A (2.9)

B(0，3)

C (5,2)

Sixth, solve the problem. (34 points)

1. Answer as required. (6 points)

(1) Qianjin Township plans to dig a 300-meter-long canal, which has been dug. How many meters are left to dig? (Draw a line graph first, and then list the formulas without calculation)

(2) Grade six students 160, 120 meet the national physical training standards (children's group). What is the success rate of sixth grade students?

Quantity relationship: _ _ _ _ _ _ _ _ _ _ _ _ Quantity relationship: _ _ _ _ _ _ Quantity relationship: _ _ _ _ _ _ _ Quantity relationship

List the comprehensive formulas without calculation: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

2. Only list, not calculate. (6 points)

(1) There are 250 kilograms of flour. There are more rice than flour. How many kilograms is rice more than flour?

(2) 250 kilograms of flour, with more rice than flour. How many kilograms of rice are there?

(3) There are 250 kilograms of flour, more than rice. How many kilograms of rice are there?

3. Answer the following questions. (22 points)

(1) The total output of vegetables in a certain township last year was 7.2 million Jin, accounting for 62.5% of the total output of vegetables this year. What is the total output of green vegetables this year?

(2) There are 450 students in Dongfeng Primary School, and the number of girls is the number of boys. How many boys and girls are there in this school?

(3) A car factory produced 36,400 cars in the first half of the year, 3,900 more than originally planned. What is the percentage of overproduction?

(4) Circumference of annular flower bed in Xicheng Greening Square18.84m.. What is the area of the flower bed?

(5) There are 250 sixth-grade students in Minmin Primary School, and the distribution of participating in extracurricular interest groups is as follows.

Students who join sports interest groups are better than those who join music groups.

How many students are there?

② How many students have joined other interest groups?

(3) Ask questions according to the topic conditions, and answer in parallel. Answer time: