Fill in the blanks. (20 points)

1. Divide a 3-meter-long iron wire into 7 segments on average, each segment is the length of the iron wire (), and each segment is the length of ().

2. (): () = 0.75 = (-) = ()% = () Cheng ().

3. In the same circle, the ratio of diameter to radius is (), and the ratio of circumference to radius is ().

4.6 (2) Class attended 48 people a day, and 2 people were absent. The attendance rate of this day is ().

5. For a certain distance, A walks for 4 hours and B walks for 3 hours. The speed ratio of a and b is (). If Party A and Party B face each other from two places, it will take () hours to meet.

6. Turn (1 ton): (250kg) into the simplest integer. The ratio is (): (), and the ratio is ().

7, 3: 20 = () minutes, 2 tons = () tons () kilograms.

8. () The statistical chart can clearly reflect the change of quantity.

The smallest number between 9.33.3% and 0 .33 is ().

10, number A is 20% more than number B, and the ratio of number A to number B is (): ().

1 1. In a subtraction, the minuend is 96, the ratio of the minuend to the difference is 7:9, the minuend is (), and the difference is ().

Second, judge. (5 points)

1 and the reciprocal of natural numbers are less than 1. ( )

Li Hua's money increased by 30%, and then spent 30%. Now she has as much money left as she used to have. ( )

3. The ratio of the number of cows to calves is 4:5, which means that cows are less than calves. ( )

4. The perimeters of two circles are equal, and the areas must be equal. ( )

5. Dividend: (divisor× quotient) = 1. ( )

Third, choose. Fill in the number of the correct answer in the brackets. 6 points)

Put 1 and 1 g of drugs into 100 g of water, and the ratio of drugs to liquid medicine is (). ① 1:99② 1: 100③ 1: 10 1④ 100: 10 1

2. Let c be the circumference of a circle, then x = ().

① Radius of a circle ② Diameter of a circle ③ Area of a circle.

3. If 25% of A is equal to B, then A is () B..① greater than ② less than ③ equal to.

4, 60 is equivalent to 80 (). ① ② ③

5. Among the following axisymmetric figures, the figure with numerous symmetrical axes is ().

① rectangle ② square ③ equilateral triangle ④ circle

6. Xiaohong walks several kilometers an hour, and the formula for how many kilometers an hour is ().

① ÷ ② ÷ ③ ×

Fourth, the calculation problem. (29 points)

1, write grades directly (5 points)

― = × 1.2= 5― 1― 1.6 = ÷ = 2 × 0 = ÷9 = (+ )× 12 = 0.2 5 ×4 = ÷ = 2 ×+ 8×20% =

2, off-type calculation (can simplify the complex. 12 points)

+ × + [ - 0 ÷ ( + )] ×

12×( + — ) 5÷- ÷5

3, solve the equation (6 points)

X―=62.5% X+ X= X―80% X = 1.6

4, text questions (6 points)

What is the quotient of the sum of 0.2 divided by 2? ② A number plus 50% of it equals 7.5. What's this number?

Fifth, the operation problem. (5 points)

Draw a semicircle with a radius of 2 cm and calculate its area and perimeter.

Six, application questions: (35 points)

1, only column type (comprehensive type or equation type), not calculated. (10)

(1) The school bought 100 kg of Chinese cabbage. How many catties are left after eating?

(2) A bucket of water is exactly 15 kg. How much does this bucket of water weigh?

(3) There is a kind of clothes in the shop, the price is 34 yuan, which is cheaper than the original 15%. How much did this dress cost?

The shop brought some fruit. The number of pears is the number of apples, and the number of apples is the number of oranges. How many baskets of oranges were shipped?

(5) Last year, a township planned to afforest 12 hectares, but actually afforested 14 hectares. What percentage is the actual afforestation more than the original plan?

2, the first column type (or equation), after the solution (choose 5 questions 25 points)

(1), a disinfectant, is prepared from liquid medicine and water according to the ratio of 1: 50. If you want to configure153kg disinfectant now, how many kilograms of liquid medicine do you need?

(2) Gao Bojia regularly buys 1 1,000 yuan three-year construction bonds. If the annual interest rate is 2.70%, how much can I withdraw at maturity?

(3) Build a canal around the mountain. The first phase of the project is completed, and the second phase accounts for 30% of the total length, leaving 800 meters untreated. How long is the canal around the mountain?

(4) There are 40 more peach trees than apricot trees in the orchard, and the number of apricot trees belongs to peach trees. How many peach and apricot trees are there?

(5), a pile of goods, a car can be shipped alone for 4 hours; Car B can be delivered in six hours by one person. Now, how many hours does it take for A and B to transport this pile of goods together?

(6) A road is 30 kilometers long, and it takes 15 days for Party A to repair it alone, and 15 days for Party B to repair it alone. How many days does it take for the two teams to repair it together?

(7) There are 12 boys on the playground, and how many girls are there on the playground? (Fill in the conditions on the horizontal line below without explicit calculation. Note: 1, the calculation result must be an integer; 2. Fill in at least five full marks correctly. )

1、 2、 3、

4、 5、 6、