1， 18÷()= 0.6 =()/20 =():()=()% =()fold

The reciprocal of 2 and 7 is (), and the reciprocal of () is 2/ 1 1.

3.0. 125: 1/6 The simplest integer ratio is (), and the ratio is ().

4. The radius of the big circle is equal to the diameter of the small circle, the ratio of the circumference of the big circle to the circumference of the small circle is (), and the ratio of the area of the big circle to the campus area is ().

5, a job, Party A alone 1/8 hours, Party B alone110 hours, the work efficiency ratio between Party A and Party B is ().

6. After 15% discount, the price of a commodity is 425 yuan, and the original price is () yuan.

7.A number is 5/8 of B number, and B number is ()% more than A number.

8. The average of A and B is 24, the ratio of A and B is 1: 3, A is () and B is ().

8 of 9.400 seeds did not germinate, and the germination rate was (). If the germination rate is 95%, () the seeds germinate.

I'll judge (2 points each, total 10)

1. When water becomes ice, the volume increases111. When it becomes water, its volume decreases111().

2. After a rope is cut by 9/10m, there is still110 ().

3. The radius ratio between the big circle and the small circle is 4: 1, so the area ratio is 16: 1 ().

4. Divide 5/8kg into 5 parts, each part is 1/8 () of the total.

5. The circumference of a circle is 3 1.4m, and the circumference of a semi-circle is 15 and 7m ().

Third, I will choose (2 points for each question, a total of 10)

1. A cup of brine contains salt 10%, and the simplest integer ratio of salt to water is ().

a 1: 10 B 1: 1 1 C 1:9

2.5 is more than 0/6 of 65438+24 ().

A9 B 8 C7 D20

3. Remove 40% percent sign ()

A is expanded to 100 times the original number, and b is reduced to1100 c of the original number.

4. The price of a tape recorder has dropped from 220 yuan to 120 yuan. What is the decrease? The formula is ()

a(220- 120)÷ 120 B 220÷ 120 C(220- 120)÷220

5. The first rope is 24 meters long, 20% longer than the second rope, and the second rope is () meters long.

A20.2 B24 C20

Fourth, I will calculate (36 points)

1, compare who is faster than who (8 points)

5/ 12×3/ 10= 5/ 14×7/25 = 80 ÷20%= 4 ÷ 4/9 =

1 ÷ 9= 4/5÷ 80%= 5/6 × 40% = 1/90 ÷ 1/45=

2. Calculation of parting (8 points for simple method)

27× 1/4+73÷4 1/2-(3/4- 1/2)÷ 1/ 16

1/3÷5/6-(40%+ 1/2) (3/4-3/8- 1/6)×24

3. Be careful when solving equations (6 points)

( 1-40% X)= 240 12X-3/4X = 7.5

4, simplify the following ratio (6 points)

1.25: 3/8 75 minutes: 0. 15: 2/3: 6/7

5. Find the area of the shaded part (8 minutes in cm).

V. Integration into life (25 points)

1. The fruit shop sent a batch of fruits, and after two fifths of them were sold, there were 24 kilograms left. How many kilograms of fruit did the fruit shop send?

My mother deposited 50,000 yuan in the bank for 2 years. The known annual interest rate is 4.68% (interest tax is 5%). How much interest tax does my mother have to pay after it expires?

3. The circumference of a circular flower bed is 12.56 meters, and the area is how many square meters?

There are 24 sets of chess and checkers in the school activity room, just enough for 1 12 people to play chess at the same time, one for every 2 people and one for every 6 people. How many chess and checkers are there in the school?

5. The picture below shows the statistics of the students who won the fifth grade math contest in a primary school.

The number of winners in classes (1) and (1) accounts for ()% of the whole grade.

(2) There are 12 winners in Class 5 (2), and how many winners are there in Class 5 (3)?

(3) What percentage of the winners in Class 5 (3) are more than those in Class 5 (4)?