1, a number written directly.

1÷ 1+0÷ 1+2÷ 1= 36×25%= 1÷0.25= 25 ÷5=

0.3? = 1÷0.75= (0.25+ )× 12= 0.75÷25%=

2. Recursive equation calculation. 3 Solve the equation.

[0.5 times (+0.8)] 5x-5x =0.8

4. Simple calculation.

( + )×5÷ 17 999 +99 +9 +

5. Column calculation.

(1) Add 1.2 to the product of 1.8 and 4, and (2) subtract 15% from a number to get 5. 1.

What is the divisor? What's this number?

Fill in the blanks.

1、3∶( )= ( )20 =24÷( )=( )%= 0.6

2. At present, the total area of China and Hongkong is1052 million square meters, which is rewritten as () square meters, and the mantissa after omitting "100000" is about () square meters.

3. Divide 3kg of salt into 5 packages on average, with 3kg of salt () in each package and () kg in each package.

Xiao Ming finishes reading a book in 8 days and reads 2 more pages every day. This book has () pages.

5.A number is 150, B number is more than A number 15%, C number is less than B number by 20%, and C number is ().

6. In the case that the market is in short supply, the price of antiviral drugs operated by a pharmacy has increased by 100%. According to the investigation by the price department, the price increase is limited to 10% of the original price, so the drug needs to be reduced by ()% now.

7, the area of a right triangle is 18 square centimeters, then this triangle ()

Axisymmetric graph. (Fill in Yes or No)

8.A = 2× 2× 3× 5, B = 2× 3× 7, and the least common multiple of A and B is ().

9. It takes 1.2 yuan to saw a piece of wood into four sections, and () yuan if it is sawed into 12 sections.

10 As shown in the figure, in the parallelogram, the area of A is 36 square centimeters, and the area of B is 36 square centimeters.

The area is 63 square centimeters, so the area of C is () square centimeters.

1 1. Xiao Wang is going to apply for a job in a courier company. Company A pays 20 yuan first every day, and then pays 2 yuan every email. Company B pays 3 yuan for every mail delivered. Use m to indicate the number of copies of mail delivered on the same day. If you apply in the company, you can get a salary of () yuan every day; When m & gt20 o'clock, it is more cost-effective to apply for a job in () company.

Third, the judge.

(1) Any line segment is an axisymmetric figure. ( )

(2) if a= b, then A: B = 4: 3. ( )

(3) The circumference of a semicircle is equal to half the circumference of a circle with the same radius. ( )

(4) One straight line is 2 cm long and two straight lines are 4 cm long. ( )

(5) The product of two composite numbers must be greater than their least common multiple. ( )

Fourth, choose.

(1) A rope is divided into two sections, the first section is meters long, and the second section occupies the whole length. Comparing the lengths of these two pieces of rope, it is ().

A, the first paragraph length b, the second paragraph length c and the same length d are not comparable.

(2)a, B and C are three nonzero natural numbers. In A = B× C, the statement that can be established is ().

A, b and c are prime numbers, and b, b and c are all prime factors of a.

C, b and c are all divisors of a, and d and b must be multiples of C.

(3) 3 1 ÷ 7 = 4 ...3. If the dividend and divisor are expanded by 10 times, then its result is ().

A, quotient 4 3 B, quotient 40 3 C, quotient 4 30 D, quotient 40 3.

(4) Look at only one corner of a triangle, and (4) Judge what triangle it is.

A, can b, can't c, not necessarily can d, definitely can't.

(5) Given that the sum of the greatest common factor and the least common multiple of two composite numbers is 143, then these two composite numbers are ().

A, 33 and 44 B, 100 and 43 C, 26 and 65 D, 90 and 53.

Fifth, solve the problem.

(1) Three kinds of fruit trees were planted in the comprehensive practice base of a school. The sum of pear trees and apple trees is 180, and the ratio of apple trees to other two trees is 1: 5. How many of these three kinds of fruit trees are there?

(2) Aunt Zhou sold two sets of fashions in the morning. Each set of 480 yuan was 20% higher than the original price and 20% lower than the original price. Q: How much did Aunt Zhou actually earn or lose after selling these two sets of fashions?

(3) An institution has three departments. There are 84 civil servants in department A, 56 civil servants in department B and 60 civil servants in department C. If all departments lay off employees in the same proportion, leaving *** 150 civil servants, how many civil servants are left in departments A, B and C?

(4) The bus and truck set off from Station A and bilibili at the same time, and met five hours later. After the encounter, the two cars still kept the original speed. When they are 196 km apart, the truck has traveled 80% of the whole journey, and the ratio of the distance that the bus has not traveled to the distance that it has traveled is 2: 3. Find the distance between Station A and bilibili.

(5) Team A needs 24 days to complete a project alone, and Team B needs 30 days. Now team A and team B have cooperated for four days, and team C has joined in, and the whole project has been completed in seven days. If three teams work together at the beginning, how many days can the whole project be completed?

(6) Two equilateral triangles overlap to find the area of the shadow part.